S06 THC 560 Axera 5

(104)

MAINTENANCE MANUAL

AXERA 5 THC 560 DRILLING HYDRAULICS

04-03-2005 GP-RL-FL

SANDVIK MINING AND CONSTRUCTION LYON S.A.S.19, av. De Lattre de TassignyB.P. 46 - 69881 MEYZIEU cedex, FRANCETel: +33 (0)4 72 45 22 00 Fax: +33 (0)4 78 31 79 80

(104) 04-03-2005 GP-RL-FLAXERA 5 THC 560 DRILLING HYDRAULICS


(104)04-03-2005 GP-RL-FL AXERA 5 THC 560 DRILLING HYDRAULICS


CONTENTS

1. GENERAL 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. SAFETY 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3. CONTROLS OF THE THC 560 DRILLING SYSTEM 8. . . . . . . . . . . . . . . . . . . . . 3.1. Controls of the THC 560 drilling system, TB and B26 boom 8. . . . . 3.2. Controls of the THC 560 drilling system, B26NV boom 9. . . . . . . . . . 3.3. Common functions 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4. TB and B26 boom 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5. B26NV boom 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4. HYDRAULIC COMPONENTS 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1. General 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2. Layout of the valve blocks 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3. Percussion and feed control block 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4. Antijamming and return automatics control block 25. . . . . . . . . . . . . 4.5. Rotation control block 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6. Feed pressure control block 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.7. Rotation speed adjusting block 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.8. Impulse cylinders control block 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5. HYDRAULIC SYSTEM 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1. Filtering of hydraulic fluid 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2. Air filtering of hydraulic oil tank 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3. Cooling of hydraulic system 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6. COMPONENTS 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7. OPERATION OF SYSTEM 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.1. Oil temperature of drilling 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2. Reading diagrams 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2.1. Valves 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3. Free circulation 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3.1. Rotation circuit 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3.2. Percussion and feed circuits 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.4. Rotation, feed and percussion 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.4.1. Rotation 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.4.2. Feed 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.4.3. Percussion 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5. Drilling 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5.1. Collaring 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5.2. Drilling 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



7.6. Antijamming automatics 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.7. Flushing flow control (option) 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.7.1. General 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.7.2. Function 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.8. Impulse cylinder controlled return automatics 55. . . . . . . . . . . . . . . . . . 7.8.1. The function of the return automatics 56. . . . . . . . . . . . . . . . . . . . . . . . . . . 7.9. Manual control of fast feed 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8. SPECIAL FUNCTIONS 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1. Threading 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2. Loosen the bit 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3. Separate flushing 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.4. Using diesel engine for running rock drill 67. . . . . . . . . . . . . . . . . . . . . . 8.5. Optional controls 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9. ADJUSTMENTS OF HYDRAULIC COMPONENTS 69. . . . . . . . . . . . . . . . . . . . . 9.1. Adjusting percussion main valve 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.2. Adjustments of variable displacement pump (1) 70. . . . . . . . . . . . . . . . 9.3. Adjusting pilot control pressure 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.4. Adjusting the max. pressure of rotation circuit 73. . . . . . . . . . . . . . . . . 9.5. Adjusting antijamming pressure 74. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.6. Adjusting percussion halfpower 76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.7. Adjusting percussion fullpower 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.8. Adjusting feed pressure 78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.9. Adjusting feed pressure 78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.10. Adjusting feedpercussion monitoring 79. . . . . . . . . . . . . . . . . . . . . . . . 9.11. Adjusting fast feed max. pressure 81. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.12. Adjusting fast feed max. speed 82. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.13. Adjusting rotation speed 83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.14. Bleeding of the impulse cylinder block 84. . . . . . . . . . . . . . . . . . . . . . . . . 9.14.1. Adjusting the pressure switch 84. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.14.2. Bleeding of the impulse cylinders 85. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.15. Bleeding of the pressure switch (12) 85. . . . . . . . . . . . . . . . . . . . . . . . . . . 9.16. Adjusting percussion hour meter pressure switch 86. . . . . . . . . . . . . . 9.17. Adjustment of stabilizer pressure 87. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



10. TROUBLESHOOTING 88. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.1. General 88. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.2. Pumps (1) and (50) do not rotate at all, or their speed is not

normal 88. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.3. Variable displacement pump (1) rotates normally, but the settings

of its regulator are not normal 89. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.3.1. Flow regulator (A) value deviates from the set value 22 bar 89. . . . . . . . 10.3.2. Pressure regulator (B) value deviates from the set value 225 bar 91. . . 10.4. Percussion not working at all 91. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.5. Percussion is on always when the powerpack or the diesel engine

is running 92. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.6. Percussion fullpower max. pressure too high 92. . . . . . . . . . . . . . . . . 10.7. Percussion fullpower max. pressure too low 93. . . . . . . . . . . . . . . . . . 10.8. Percussion halfpower pressure too high 94. . . . . . . . . . . . . . . . . . . . . . 10.9. Percussion halfpower pressure too low 95. . . . . . . . . . . . . . . . . . . . . . . 10.10. Feed not working at all (drilling) 95. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11. Drilling feed pressure too low 96. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.12. Drilling feed pressure too high 97. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.13. Manually controlled fast feed not working 98. . . . . . . . . . . . . . . . . . . . . 10.14. Manually controlled fast feed too slow 99. . . . . . . . . . . . . . . . . . . . . . . . 10.15. Manually controlled fast feed too fast 99. . . . . . . . . . . . . . . . . . . . . . . . . 10.16. Rotation pressure too low 100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.17. Rotation pressure too high during drilling 101. . . . . . . . . . . . . . . . . . . . . 10.18. Rotation speed regulation not working 101. . . . . . . . . . . . . . . . . . . . . . . . 10.19. Return automatics fast feed not working 102. . . . . . . . . . . . . . . . . . . . . . 10.20. Electric system troubleshooting 103. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.21. Main reference values (factory settings) for troubleshooting 104. . . .



1. GENERAL

These instructions describe the testing and adjusting procedures, and the operatingprinciple of the THC 560 drilling hydraulic system.To clarify the operating principle in different situations, flowcharts with colour codesaccompany the explanations.Tamrock Service is always willing to give advice and help in any service problems.

2. SAFETY

Always follow

!

" "

"!"

# $ !" "

$ " " !

%! ! !" !" &' # ( !!"

$" "

WARNING

WARNING

WARNING

WARNING

)*$%

)*$%



3. CONTROLS OF THE THC 560 DRILLING SYSTEM

3.1. Controls of the THC 560 drilling system, TB and B26 boom

05 06 07 08

01 02 03 04

09

16

17

18

10 11 12 13 14

15

Rotation pressure gauge Rotation control lever

Percution pressure gauge Percussion control lever

Feed pressure gauge Feed control lever

Water pressure gauge Air / water flushing control lever

Boom lift and swing lever Fast feed control lever

Boom zoom and head rotation lever Feed force regulating knob

Feed tilt and swing lever Automatic return switch

Feed extention and divergence lever Power pack switch

Rotation speed control knob Emergency stop push button

01 10

02 11

03 12

04 13

05 14

06 15

07 16

08 17

09 18

04 01 02 030807060509

12 11 1015 14 1318 17 16



3.2. Controls of the THC 560 drilling system, B26NV boom

05 06 07 08

01 02 03 04

09

16

17

18

10 11 12 13 14

15

19

Rotation pressure gauge Percussion control lever

Percution pressure gauge Feed control lever

Feed pressure gauge Air / water flushing control lever

Water pressure gauge Fast feed control lever

Boom lift and swing lever Feed force regulating knob

Boom zoom and head rotation lever Automatic return switch

Feed tilt and swing lever Power pack switch

Feed extention and angle lever Emergency stop push button

Rotation speed control knob Divergence lever

Rotation control lever

01 11

02 12

03 13

04 14

05 15

06 16

07 17

08 18

09 19

10

04 01 02 030807060509

12 11 1015 14 1318 17 16

19



3.3. Common functions

Turn the switch into the STARTposition andrelease to start the powerpack.

Powerpack running.

Turn the switch into the Oposition to stopthe powerpack.

Drilling without returnautomatics selected.

Drilling with returnautomatics selected.

Automatic return before reaching front limit.Turn the selector switch right and release itto middle position.



Push emergency stop button to stop thepowerpacks, the compressor and the water-pump



Push lever forward to rotating clockwise (threadopening).

Pull lever backwards to rotating counterclock-wise (drilling).

Push lever for full percussion (used to loosenthe bit).

Pull lever backwards to activate percussion indrilling.

Push lever forward to activate feed backwards.

Pull lever backwards to activate feed forward.



Push lever forward to activate air flushing.

Pull lever backwards to activate water flushing.

Push lever forward to activate fast feed back-wards.

Pull lever backwards to activate fast feed for-wards.



Turn clockwise to increase rotation speed.

Turn counterclockwise to decrease rotationspeed.

Turn clockwise to increase feed pressure.

Turn counterclockwise to decrease feed pres-sure.



3.4. TB and B26 boom

Boom swing left

Boom lifting

Boom lowering

Boom swing right

Boom head rotationcounterclockwise

Boom zoom in

Boom zoom out

Boom head rotationclockwise



Feed swing left

Feed tilt down

Feed tilt up

Feed swing right

Bolting cylinder out

Divergence down

Feed transfer forward

Feed transferbackwards

Bolting cylinder in

Divergence up



Push lever forward to close Pito jaws

Pull lever backwards to open Pito jaws

(OPTION)



3.5. B26NV boom

Boom swing left

Boom lifting

Boom lowering

Boom swing right

Boom head rotationcounterclockwise

Boom zoom in

Boom zoom out

Boom head rotationclockwise



Feed swing left

Feed tilt down

Feed tilt up

Feed swing right

Feed angle left

Feed transfer forward

Feed transferbackwards

Feed angle right



Push lever forward to divergence down

Pull lever backwards to divergence up



4. HYDRAULIC COMPONENTS

4.1. General

The return automatics system has been controlled by impulse cylinders.Before any maintenance or adjusting operations, identify the construction of the returnautomatics (see the picture below).

HH SM

Impulse cylinders



4.2. Layout of the valve blocks

Main valve blocks :

- Percussion and feed control block- Anti jamming and return automatics control block- Rotation control block- Feed pressure control block- Impulse cylinders control block

These valve blocks are located on machines carrier, see following pages for details.



4.3. Percussion and feed control block

432

910 6

15

23

8

25

9M7

M9

M2

M1

M6

M2

M8

M3

16

A

136137

No Component Tightening torque[Nm] (for the cap)

2. Percussion line pressure compensator 2002156. Percussion halfpower pressure relief valve 508. Feed / percussion monitoring valve 33,99. Orifice (percussion)

10. Shuttle valve 33.915. Shuttle valve 33.916. Shuttle valve 33.923. Feed directional valve 2225. Max. pressure relief valve for feed line A 4043. Pilot pressure regulating valve 33.9

136. Pressure reducing and relieving valve for stabilizer pressure(option)

33.9

137. Control valve for stabilizer pressure (option) 33.9



42

5

293 4

24

307

19

M3

M6

M2M8

B

LS1

M4

LS2

X3

X4

X2X1

M5A1

P5P1

T3

X6

X5

18


3. Percussion main valve 504. Percussion selector valve 33,95. Percussion pressure selector valve 33,97. Percussion max. pressure relief valve 33.9

18. Sequence valve 33.919. Nonreturn valve 33,924. Max. pressure relief valve for feed line B 4029. Feed LS line selector valve 33.930. Fast feed max. pressure relief valve 33.942. Shuttle valve 33.9



4.4. Antijamming and return automatics control block

39 36 37 38 35

34

M1

M3

M2

Y47

No Component Tighteningtorque NmCoil tighten-

ing torque Nm

34. Antijamming valve 8.9 35. Shuttle valve 33.9

36. Shuttle valve 33.9 37. Shuttle valve 33.9

38. Shuttle valve 33.9

39. Return automatics selector valve 33.9 6.8



4.5. Rotation control block

52. Pressure compensator53. Rotation directional valve55. Rotation max pressure relief valve56. Flow control valve57. Nonreturn valve

Tightening torques of valves

Valve number Tightening torque

55 45 Nm

57

2 11 : Entry element

2 : Controls element

3 : Locker plate

56

53

56

55

52

3



4.6. Feed pressure control block


20. Feed pressure regulating valve 33,932. Return circuit selector valve for feed LS line 33,944. Directional valve 33,9

4.7. Rotation speed adjusting block


59. Rotation speed regulating valve 33,960. Shuttle valve 33,9

20

44

32



4.8. Impulse cylinders control block

123125

124

126127

118119

120

121

T

P

MFMR

R1F1


118. Pressure relief valve (rear) 22119. Pressure relief valve (front) 22120. Orifice / impulse circuit (rear) 10121. Orifice / impulse circuit (front) 10123. Pressure switch (front) 124. Nonreturn valve (front) 20125. Pressure switch (rear) 126. Nonreturn valve (rear) 20127. Pressure regulator / relief valve 65



5. HYDRAULIC SYSTEM

5.1. Filtering of hydraulic fluid

The system uses pressure and return filtering. Pressure filtering is used in the pump (1)circuit only, but return flow filtering is common to both pumps (1 and 50).Hosemounted filter (112) with filtering capacity of 20 m abs. is used for pressurefiltering. If the pressure difference over the filter rises over 2.5 bar, the indicator light H611on the indicator light panel goes on, indicating that the filter element should be replaced.The filtering unit body is also equipped with bypass valve that opens if the pressuredifference exceeds 3.5 bar.The return flow of both pumps passes through the return filter (113). The return filter ismounted on the tank. The filtering capacity of the return filter element is 10 m abs. If thepressure difference over the filter rises higher than 2 bar, the indicator light H607 on theindicator light panel goes on, indicating that the filtering element should be replaced. Thefiltering unit body is also equipped with bypass valve that opens if the pressure differenceexceeds 2.4 bar.The manufacturers recommendation for the purity class of the system is 17/13 accordingto the ISO standard.

If the oil is cold (below +30C), both pressure and return oil filtermonitoring are bypassed to avoid unnecessary alarms caused by thehigh viscosity of cold oil.

5.2. Air filtering of hydraulic oil tank

The hydraulic oil tank is also equipped with an air filter. Its filtering capacity is 5 m. Thisfilter has no monitoring indicators but, to ensure the cleanness of hydraulic oil, it shouldbe replaced according to the service instructions.

5.3. Cooling of hydraulic system

The oil returning from the various actuators (except leakage oil) is gathered together incommon return line using a collector tube (115). From the collector tube (115) the return oilis led through the cooler (114) and the return oil filter (113) into the hydraulic oil tank (110).The oil cooler (114) is always in operation when water flushing is on. The cooling capacityof the cooler can be increased by opening the ball valve (132) at the cooler.The hydraulic system is also equipped with monitoring system for the hydraulic oiltemperature. The oil temperature in the tank is measured by sensor (111). Thistemperature sensor stops the powerpack if the temperature rises higher than +75C. Atthe same time, the signal light H610 in the warning light panel goes on.

)*$%



18

125123

124 126

127

129 130

121 120

TP

F1F2

MF MR R1

118

S80

S81

50

16

15

2 3 9 7

10

428

6

5

4

2622

23

25

24

11

21

132114

115 1351

116

117

13

28

32

20

33102

103

101

100

31

14

6258

61

60

59

112FROM CARRIERCIRCUIT

39

38

37

363534

2930

19

43

137136

138

12

THE PRESSURE SWITCH OF THEPERCUSSIONHOUR METER

TO THE BOOMCONTROL (PI)

FROMTHEBOOMCONTROLVALVE

S126

SLX

IN

OUT

IN

OUT

OUT

IN

B IN

OUT

44

A2/B2 K2/K4 A1/B1 T1/T3 T4

119

122

111

110

133

113R1

TO SHANK LU-BRICATION(ALTERNATIVE)

53

57

5552

56

5154

6. COMPONENTS Hydraulic system with impulse cylinder controlled return automatics

18

125123

124 126

127121 120

TP

F1F2

MF MR R1

118

S80

S81

50

16

15

2 3 9 7

10

428

6

5

4

2622

23

25

24

11

21

132114

1151

116

117

13

28

32

20

33102

103

101

100

31

14

62

58

61

60

59

112

FROM CARRIERCIRCUIT

39

38

37

363534

2930

19

43

137136

138

12

THE PRESSURESWITCH OF THEPERCUSSIONHOUR METER



S126

SLX

IN

OUT

IN

OUT

OUT

IN

BIN

OUT

44

A2/B2 K2/K4 A1/B1 T1/T3T4

119

122

111

110

133

113R1


5451

57

5352

56

55

135

129 130



1 Variable displacement pump Output for percussion, feed, boom hydraulics,and pilot control2 Percussion line pressure compen-

satorKeeps percussion pressure constant, irrespective of variationsin input pressure

3 Percussion main valve Control oil flow to rock drill, controlled by percussion selectorvalve (4)

4 Percussion selector valve Opens and closes percussion main valve (3) according to pilotcontrol valve (14)

5 Percussion pressure selector valve Selects half or full power percussion6 Percussion halfpower pressure

relief valveDetermines pressure level for percussion half power

7 Percussion max. pressure reliefvalve

Determines percussion max. pressure

8 Feed/percussion monitoring valve Determines pressure difference between feed and percussion9 Orifice Restricts oil flow in percussion LS line10 Shuttle valve Directs percussion, feed, or boom LS signal to variable displ.

pump11 Percussion pressure gauge Indicates percussion line pressure12 Pressure switch Switches on percussion hour meter13 Percussion mechanism14 Percussion pilot control valve Turns percussion on for drilling and threadloosening15 Shuttle valve Directs pressure from percussion pilot valve (14) to percussion

selector valve (4)16 Shuttle valve Directs pressure from percussion pilot valve (14) or feed pilot

valve (31) to percussion pressure selector valve (5)18 Sequence valve Determines min. percussion pressure when drilling at full pow-

er

19 Nonreturn valve Prevents oil flow from feed pressure to percussion LS line20 Feed pressure regulating valve Determines feed pressure for collaring and in full power dril-

ling, affects not only feed pressure but also percussion pres-sure (feed/percussion monitoring)

21 Feed pressure gauge Indicates feed pressure22 Feed line pressure compensator Keep feed pressure constant, irrespective of input pressure

variations23 Feed directional valve Directs oil flow to feed according to pilot valves (31) and (33)24 Feed line B max. pressure relief

valve25 Feed line A max. pressure relief

valve26 Shuttle valve Directs oil flow in LS line of feed directional valve28 Feed cylinder29 Feed LS line selector valve Selects normal feed pressure or fast feed pressure according

to pilot valves (31) and (33)30 Fast feed max. pressure relief

valveDetermines max. pressure for fast feed movement



18

125123

124 126

127121 120

TP

F1F2

MF MR R1

118

S80

S81

50

16

15

2 3 9 7

10

428

6

5

4

2622

23

25

24

11

21

132114

1151

116

117

13

28

32

20

33102

103

101

100

31

14

62

58

61

60

59

112

FROM CARRIERCIRCUIT

39

38

37

363534

2930

19

43

137136

138

12




S126

SLX

IN

OUT

IN

OUT

OUT

IN

BIN

OUT

44

A2/B2 K2/K4 A1/B1 T1/T3T4

119

122

111

110

133

113R1


5451

57

5352

56

55

135

129 130



31 Feed pilot control valve Determines feed speed and direction, and sets percussion to fullpower for drilling

32 Selector valve for feed LS linereturn circuit

Selects correct return line automatically for forward/reverse feed

33 Fast feed pilot control valve Determines fast feed speed and direction34 Antijamming valve Controls feed direction in an antijamming situation35 Shuttle valve Directs pressure information of feed pilot valve (31) to percus-

sion pressure selector valve (5) and to feed LS line selectorvalve (29)

36 Shuttle valve Directs pressure information of feed pilot valve (31) to percus-sion pressure selector valve (5) and to feed LS line selectorvalve (29)

37 Shuttle valve Directs pressure information of feed pilot valve (31) or fast feedcontrol valve (33) to feed directional valve (23) (reverse feed)

38 Shuttle valve Directs pressure information of feed pilot valve (31), fast feedpilot valve (33), or return automatic to feed directional valve (23)

39 Return automatics selectorvalve

Controls feed directional valve (23) according to the value set bypilot pressure regulating valve (43)

42 Shuttle valve Directs LS signal of feed or boom circuit to variable displ. pump43 Pilot pressure regulating valve Sets pilot circuit pressure44 Directional valve Directs oil flow into the tank or into the feed circuit50 Gear pump Output of oil flow to rotation circuit51 Rotation pressure gauge Indicates rotation pressure52 Pressure compensator Keeps rotation speend constant, irrespective of load53 Rotation directional valve Controls oil flow to rotation motor (54)54 Rotation mechanism55 Rotation max. pressure relief

valveDetermines max. pressure in rotation line

56 Flow control valve57 Nonreturn valve Prevents oil flow back to pump (50)58 Rotation pilot control valve Determines direction of rotation59 Rotation speed regulating valve Sets rotation speed to desired value60 Shuttle valve Directs pilot control pressure info to rot. speed regul. valve (59)61 Orifice Restricts oil flow to directional valve of rotation (53) and to rota-62 Orifice

Restricts oil flow to directional valve of rotation (53) and to rota-tion speed regulating valve (59)

100 Water control valve Controls water flow to rock drill101 Air control valve Controls air flow to rock drill102 Selector valve for separate

flushingOpens/closes water or air control valve

103 Shuttle valve Activates either automatic or separate water flushing110 Hydraulic oil tank111 Hydraulic oil temperature gauge112 Pressure filter Filters oil coming from variable displacement pump (1)



18

125123

124 126

127121 120

TP

F1F2

MF MR R1

118

S80

S81

50

16

15

2 3 9 7

10

428

6

5

4

2622

23

25

24

11

21

132114

1151

116

117

13

28

32

20

33102

103

101

100

31

14

62

58

61

60

59

112

FROM CARRIERCIRCUIT

39

38

37

363534

2930

19

43

137136

138

12




S126

SLX

IN

OUT

IN

OUT

OUT

IN

BIN

OUT

44

A2/B2 K2/K4 A1/B1 T1/T3T4

119

122

111

110

133

113R1


5451

57

5352

56

55

135

129 130



113 Return oil filter Filters return oil coming from drilling and carrier hydraulics114 Cooler Oil cooler for drilling and carrier hydraulics return flows115 Collecting piece For drilling and carrier hydraulics return flows116 Nonreturn valve Prevents oil flow back to variable displacement pump117 Nonreturn valve Prevents oil flow from drilling control circuit to carrier circuit118 Pressure relief valve Determines pressure level for rear limit impulse cylinder119 Pressure relief valve Determines pressure level for front limit impulse cylinder120 Orifice Stabilizes rear limit impulse cylinder pressure121 Orifice Stabilizes front limit impulse cylinder pressure122 Air filter / hydraulic tank123 Pressure switch Monitors pressure of the front limit impulse cylinder124 Nonreturn valve Prevents return flow from front limit impulse cylinder125 Pressure switch Monitors pressure of the rear limit impulse cylinder126 Nonreturn valve Prevents return flow from rear limit impulse cylinder127 Pressure regulator / relief valve Limits feed pressure for front and rear limit impulse circuit129 Front impulse cylinder130 Rear impulse cylinder132 Ball valve For extra cooling133 Pressure switch Monitors minimum pressure in pressure chamber135 Collecting piece For nonpressure circuit hydraulic return flows136 Pressure reducing and relieving

valve (option)Sets desired stabilizer pressure

137 Control valve (option) Controls stabilizer pressure138 Pressure switch Monitors stabilizer pressure



7. OPERATION OF SYSTEM

7.1. Oil temperature of drilling

After cold start, hydraulic oil should be warmed up to drilling temperature before drillingis started. This can be accomplished, for instance, by using an electric oil heater in thetank.The recommended oil temperature of the drilling is between 40 60 degrees (dependingon the type of the oil).

7.2. Reading diagrams

The following colors has been used in hydraulic diagrams for explaining different drillingoperations.Blue percussion Dash blue percussion return line

Short dash blue percussion LSlineRed feed Dash red feed return line

Short dash red feed LSlineGreen rotation Dash green rotation return line

Short dash green rotation LSlineYellow pilot control Dash yellow pilot return line

Short dash yellow pilot lineBrown return automatics Dash brown return automatics return lineViolet stabilizer Dash violet stabilizer return line

7.2.1. Valves

The number of the coil is colored red when the coil is activated.+,



117

125123

124 126

127

129 130

121 120

TP

F1

F2

MFMR R1

S80

S81

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

115

13

28

33102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12

THE PRESSURESWITCH OF THEPERCUSSION HOURMETER



S126

100

50

1

116

188

OUT

OUT

OUT

OUT

IN

IN

IN

B

IN

32

20

44

A2/B2 K2/K4 A1/B1 T1/T3 T4

122

111

110

133

113R1


5451

57

5352

56

55

62

58

118119

135



7.3. Free circulation

Free circulation means a situation where the powerpack is running, but no hydraulicactuators are used.7.3.1. Rotation circuit

The rotation pump (50) sucks the oil from the tank (110) and gives the flow out into therotation circuit. The oil flow produced by the rotation pump (50) flows through the freecirculation valve (52) of the rotation directional valve (53), the oil collector (115), the cooler(114) and the return oil filter (113) into the tank (110).

7.3.2. Percussion and feed circuits

The variable displacement pump (1) takes oil in through the intake connection of the tank(110) and pumps it into the percussion and feed circuits. As there is no consumption ofoil in these circuits during free circulation, it means that there is no pressure in the loadsensing line, either. The swash plate of the pump (1) is at 0 angle and the pump (1) ismerely maintaining a certain pressure (standby pressure) in the pressure line. Thestandby pressure is regulated by the flow controller of the pump (1).The pressure regulator / relief valve (43) regulates the pilot line pressure.



50

125123

124 126

127

129 130

121 120

TP

F1F2

MFMR R1

S80

S81

111

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

28

33102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12




S126

100

1

116

117

188

OUT

OUT

OUT

OUT

IN

IN

ININ

B

32

20

44

A2/B2 K2/K4 A1/B1 T1/T3T4

122

111

110

133

113R1


5451

57

5352

56

55

62

58

118119

115 135



7.4. Rotation, feed and percussion

7.4.1. Rotation

When the control lever of the rotation pilot control valve (58) is locked into a back position(rotation to counterclockwise), pilot pressure will be able to affect the port a of the rotationdirectional valve (53) and to the port P1 of the rotation speed regulating valve (59).When the rotation pilot control valve (58) is locked into the back position, pilot pressureaffects the port a of the rotation directional valve (53) and the port P1 of the rotation speedregulating valve (59). The oil produced by the rotation pump now flows to the rotationdirectional valve (53), the 3way compensator (52), the rotation pressure gauge (51), theantijamming valve (34) and the rock drill rotation motor (54). In this situation, the 3waycompensator (52) is activated and it tries to keep the rotation speed of the rock drill at thevalue set with the regulating valve (59)The return flow from the rotation motor (54) passes through the connections B and T ofrotation directional valve (53), the collecting piece (115), the cooler (114), and the returnoil filter (113), and ends up in the tank (110).The leak oil from rotation pilot control valve (58) and rotation speed regulating valve (59)will be first directed to the collecting piece (135) and from there to the hydraulic oil tank(110).Oil flows also from the connection (X) of the rotation directional valve (53) to theconnection (P) of the control block of return automatics. From there oil flows through thepressure reducing and relieving valve (127) and the check valve (124) to the pressureswitch (123), to the pressure relief valve (119) and to the front impulse cylinder (129),through the check valve (126) to the pressure switch (125), to the pressure relief valve(118) and to the rear impulse cylinder (130). Oil flows also through the orifices (121) and(120) to the oil collector (135). From there oil flows to the hydraulic oil tank (110).



501

116

117

125123

124 126

127

129 130

121 120

TP

F1F2

MF MR R1

S80

S81

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

28

33102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12




S126

100

188

OUT

OUT

OUT

OUT

IN

IN

ININ

B

32

20

44

A2/B2 K2/K4A1/B1T1/T3 T4

122

111

110

133

113R1


62

58

118119

115 135

5451

57

5352

56

55



7.4.2. Feed

When the control lever of the feed pilot control valve (31) is locked into a back position,(feed forward) pilot control pressure will be able to affect to control line d of the feeddirectional valve (23) through the antijamming valve (34) and the shuttle valve (36). Inaddition, the pilot pressure affects to the feed LS line selector valve (29) through theshuttle valve (35), and to the percussion pressure selector valve (5) through the shuttlevalve (16). The pilot pressure affects also to the directional valve (44) via shuttle valve(35).The oil produced by the variable displacement pump (1) flows through the nonreturnvalve (116) and the pressure filter (112) to the port P1 of control block of drilling. From herethe oil continues to flow through the feed line pressure compesator (22) to the controlspool of feed directional valve (23) and from there to the feed line A max. pressure reliefvalve (25) and through the connector A to the feed cylinder (28). From feed directionalvalve (23) oil flows also to the spring housing of the feed line pressure compensator (22)and through the shuttle valve (26) and the feed LS line selector valve (29) to the feedpressure regulating valve (20). After the shuttle valve (26) the oil is able also to flow to thefeed pressure gauge (21) and through the shuttle valves (42) and (10) to the flow controlvalve of variable displacement pump (1).From connector P1 of control block of drilling the oil is able to flow to the pilot pressureregulating valve (43) and from there to the rotation pilot control valve (58), the percussionpilot control valve (14), the feed pilot control valve (31), the selector valve for separateflushing (102), the fast feed pilot control valve (33) and the return automatics selectorvalve (39) and the shank lubrication unit.Oil from the feed cylinder (28) flows to the connection B of feed directional valve (23) andfrom there still to feed line B max. pressure relief valve (24). From here oil flows throughthe tank connector T3 of control block of drilling to the collecting piece (115), via the oilcooler (114) to the return oil filter (113) and the oil tank (110)The leak oil from the feed pilot control valve (31) is first directed to the collecting piece(135) and from there to the hydraulic oil tank (110).



117

100

125123

124 126

127

129 130

121 120

TP

F1F2

MF MR R1

S80

S81

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

28

33102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12


TO THE BOOM CONTROL(PI)


S126

501

116

188

OUT

OUT

OUT

OUT

IN

IN

IN

IN

32

20

44

A2/B2 K2/K4 A1/B1 T1/T3 T4

122

111

110

133

113R1


62

58

118119

115 135

5451

57

5352

56

55



7.4.3. Percussion

When the percussion pilot control valve (14) is locked into the back position, pilot controlpressure affects the water control valve (100) through the shuttle valve (103), and turnswater flushing on.Pilot control pressure also activates the pressure switch (12) of the operating hour meter,and affects the percussion selector valve (4) through the shuttle valve (15). Thepercussion selector valve (4) opens the percussion main valve (3), and the output of thevariable displacement pump flows through the nonreturn valve (116), the pressure filter(112), the compensator (2), and the percussion main valve (3) to the percussionmechanism (13). In addition, the percussion circuit pressure reaches the pressure reliefvalve (6) for halfpower percussion, passing through the orifice (9) and the percussionselector valve (5). After the orifice (9), the pressure also affects the pressure compensator(2), and reaches the loadsensing line of the variable displacement pump (1) through thethe shuttle valve (10).The pressure after the percussion main valve (3) also affects the percussion pressuregauge (11).The return flow from the rock drill (13) passes via the collecting piece (115), the cooler(114), and the return oil filter (113) to the hydraulic oil tank (110). Leak oil from thepercussion pilot control valve (14) is directed first to the collecting piece (135) and fromthere to the hydraulic oil tank (110).When using rock drill with stabilizer oil flows also from the connection (P1) of the drillingcontrol block to the pressure reducing and relieving valve (136) and to the control valve(137) of the stabilizer. The control valve (137) of the stabilizer is activated when usingloosening the thread function (the control lever of percussion in front position). In thissituation there is no control pressure in the stabilizer and the oil flows from the stabilizervia the oil collector (115), the oil cooler (114), and the return filter (113) into the hydraulicoil tank (110).



117

125123

124 126

127

129 130

121 120

TP

F1F2

MF MRR1

S80

S81

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

28

33102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12




S126

100

501

116

188

OUT

OUT

OUT

OUT

IN

IN

IN

IN

B

32

20

44

A2/B2 K2/K4 A1/B1T1/T3T4

122

111

110

133

113R1


62

58

118119

115 135

5451

57

5352

56

55



7.5. Drilling

7.5.1. Collaring

Collaring is composition of rotation, feed and percussion. All these functions are describedin the chapter Rotation, feed and percussion.With the THC 560 system, collaring can be done accurately and smoothly by using thestepless feed and rotation speed, and feed pressure adjustments. In collaring, feed andpercussion are connected in parallel.The control lever of feed pilot control valve (31) is used for selecting collaring andfullpower drilling. The lever offers two operating ranges: halfpower and fullpowerdrilling. On the lever movement, these two ranges are separated from one another by anoticeable step. Fullpower drilling starts when this step is passed.Drilling is started by locking the levers of the pilot control valves for rotation (58) andpercussion (14) into the back position. When the lever for the feed pilot control valve (31)is pulled backwards, the rock drill moves at the desired speed until the drill bit hassufficiently penetrated the rock. Fullpower drilling is started by locking the control leverof the feed pilot control valve (31) into the back position.Another method for collaring is to turn the feed pressure regulating valve (20) fully open(counterclockwise) and then lock all three control levers (rotation, percussion and feed)into the back position. Drilling starts now with half power, and continues so until the drillingvalues are returned to correspond to fullpower drilling by turning the feed pressureregulating valve (20). In this collaring method, percussion and feed are also all timeconnected in series.When using rock drill with stabilizer oil flows also from the connection (P1) of the drillingcontrol block to the pressure reducing and relieving valve (136) and to the control valve(137) of the stabilizer. The control valve (137) of the stabilizer is not activated duringcollaring, drilling, antijamming automatics, return automatics or threading. In thesesituation the oil flows through the control valve (137) to the pressure switch (138) and tothe stabilizer of the rock drill.



125123

124 126

127

129 130

121 120

TP

F1

F2

MF MR R1

S80

S81

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

28

33102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12



FROM THEBOOMCONTROLVALVE

S126

100

117

50

1

116

188

OUT

OUT

OUT

OUT

IN

IN

IN

B

IN

32

20

44

A2/B2 K2/K4 A1/B1 T1/T3 T4

122

111

110

133

113R1


62

58

118119

115 135

5451

57

5352

56

55



7.5.2. Drilling

After successful collaring, fullpower drilling is started by locking the control lever of thefeed pilot control valve (31) into the back position. The percussion pressure selector valve(5) changes its position and opens a connection through the sequence valve (18),feed/percussion monitoring valve (8), and nonreturn valve (19) to the feed LS circuit.Now, percussion and feed are connected in series, and percussion pressure depends onfeed pressure. The pressure difference between feed and percussion is determined bythe feed/percussion monitoring valve (8) and the sequence valve (18). The min. pressureof percussion is determined by the sequence valve (18). The max. pressure of percussionis determined by the percussion max. pressure relief valve (7).When using rock drill with stabilizer oil flows also from the connection (P1) of the drillingcontrol block to the pressure reducing and relieving valve (136) and to the control valve(137) of the stabilizer. The control valve (137) of the stabilizer is not activated duringcollaring, drilling, antijamming automatics, return automatics or threading. In thissituation the oil flows through the control valve (137) to the pressure switch (138) and tothe stabilizer of the rock drill.

percussion

Collaring Full power drilling

max

min

Adjusting rangeof feedpercus-sion monitoring

Pressure differencebetween feed andpercussion



117

50

1

116

125123

124 126

127

129 130

121 120

TP

F1F2

MF MR R1

S80

S81

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

28

33102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12




S126

100

188

OUT

OUT

OUT

OUT

IN

IN

IN

IN

B

32

20

44

A2/B2 K2/K4A1/B1T1/T3 T4

122

111

110

133

113R1


62

58

118119

115 135

5451

57

5352

56

55



7.6. Antijamming automaticsThe antijamming system operates in a situation where the rotation pressure of the drillrod rises above a set value due to, for instance, a fissure in the rock. In this situation, theoperation of the hydraulic system differs from normal as follows:When rotation pressure rises above the value set with the antijamming valve (34), thevalve (34) changes its position. The pilot control pressure now reaches the port c of thefeed directional valve (23) through the shuttle valves (37) and (38). This means that thefeed directional valve (23) also changes its position, and feed pressure enters the feedline B, and feed starts pulling backwards. Feed pressure also reaches the loadsensingline of the variable displacement pump (1) through the LS channel of the feed directionalvalve (23) and the shuttle valves (26), (42), and (10). After the nonreturn valve (26), thepressure in the feed LS line also reaches the pressure gauge (21). As feed backwards ison, the reversing pressure affects the tank line T1 of the feed pressure regulating valve(20). In this situation, the feed pressure regulating valve (20) does not determine the max.reversing pressure but it is determined by the max. pressure regulating valve (24) of thefeed line B of the feed directional valve (23).During the reversing phase, the rock drill (13) operates with fullpower percussion. Thepercussion pressure is restricted by the percussion max. pressure relief valve (7).Feed reversing stays on until rotation pressure drops below the value set with theantijamming valve (34). After this, the antijamming valve (34) changes its position andthe control pressure from the pilot control valve (31) reaches the control line d of the feeddirectional valve (23) through the shuttle valve (36). The feed directional valve (23)changes its position and feed pressure reaches the feed line A, whereby feed startsforwards. Feed and percussion pressures are lower than normal, which is caused by thelower feed resistance and the feed/percussion monitoring. Sequence valve (18) doesntallow the percussion pressure go under the setting value. The feed and percussionpressures return to their normal set values as the feed resistance rises normal.The return flow from the rock drill rotation motor (54) passes through the rotationdirectional valve (53), the collecting piece (115), the cooler (114), and the return oil filter(113), and ends up into the hydraulic oil tank (110).The return flow from the percussion mechanism (13) passes through the collecting piece(115), the cooler (114), and the return oil filter (113), ending up into the hydraulic oil tank(110).The return flow from the feed cylinder (28) passes through the feed directional valve (23),the collecting piece (115), the cooler (114), and the return oil filter (113), and ends up intothe hydraulic oil tank (110).The return flow from the control block of return automatics passes through the collectingpiece (135) and ends up into the hydraulic oil tank (110).The leak oil of the pilot control valves (14), (31) and (58) is directed first to the collectingpiece (135) and from there to the hydraulic oil tank (110).When using rock drill with stabilizer oil flows also from the connection (P1) of the drillingcontrol block to the pressure reducing and relieving valve (136) and to the control valve(137) of the stabilizer. The control valve (137) of the stabilizer is not activated duringcollaring, drilling, antijamming automatics, return automatics or threading. In thissituation the oil flows through the control valve (137) to the pressure switch (138) and tothe stabilizer of the rock drill.



125123

124 126

127

129 130

121 120

TP

F1

F2

MF MR R1

S80

S81

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

28

33102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12




S126

100

117

501

116

188

OUT

OUT

OUT

OUT

IN

IN

IN

IN

B

32

20

44

A2/B2 K2/K4A1/B1T1/T3 T4

122

111

110

133

113R1


62

58

118119

115 135

5451

57

5352

56

55



7.7. Flushing flow control (option)

7.7.1. General

Flushing flow control is an optional function. When this function is required, the rig will besupplied with a water flow meter in the flushing circuit. Each boom has its own separateflushing flow meter.7.7.2. Function

When the water flow in the flushing circuit drops below the set value of the flow meter (forexample, due to lack of water or blocked drilling bit), the return automatics selector valve(39) is activated which lets the pilot pressure affect the connection (C) of the feeddirectional valve (23) via the shuttle valve (38).Now there is pilot pressure at both connection (c) and (d) of the feed directional valve (23).The pilot pressure at the connection (c) is higher than at the connection (d). The spool ofthe directional valve (23) changes its position so that the rock drill starts to reverse untilthe water flow is normal.



125123

124 126

127

129 130

121 120

TP

F1

F2

MF MR R1

S80

S81

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

28

33102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12




S126

100

117

501

116

188

OUT

OUT

OUT

OUT

IN

IN

IN

IN

B

32

20

44

A2/B2 K2/K4A1/B1 T1/T3 T4

122

111

110

133

113R1


62

58

118119

115 135

5451

57

5352

56

55



7.8. Impulse cylinder controlled return automaticsWhen return automatics is on and the rock drill reaches the front limit, starts the returnmovement, with rotation turned on. As the rock drill reaches the rear limit, fast feed isswitched off and relay K70 is delaying by 0.2 sec and during this time the rotation of drillrod stops. If the return automatics is desired to use without rotation, the control diode V19in the JB 102box must be removed.

JB 102box

V19

V10

18

29

310

410

510

611

712

712

712

1512

V20

V11V17V18V19

1714

1612

1613 14

18

K76

FLUSH.OPT.

K73

TMSOPTION

X102B

K74 X1

K71K72

K70

K75

Return automatics can also be used as an auxiliary function. In this case, the selectorswitch S73 for return automatics must be turned to the right and then back, whereby therock drill starts return movement with rotation.When the rock drill reaches the front impulse cylinder (129), the pressure switch (123/S80)is activated, whereby percussion and feed control valves (14) and (31) are centralized (therotation pilot control valve (58) remains on). After that the control pressure in the saidcontrol lines disappears, and the percussion selector valve (4) changes its position andcloses the percussion main valve (3).Control pressure is also removed from the water control valve (100), and water flushingis shuts off. The pressure switch (123/S80) activates the coil Y47 of the return automaticsselector valve (39), whereby the pilot control pressure regulated by the pilot controlpressure regulating valve (43) is able to reach the control line c of the feed directional valve(23) through the return automatics selector valve (39) and the shuttle valve (38). In thissituation, the feed directional valve (23) immediately changes its position, and fast feedis switched on.Feed pressure also reaches the load sensing line of the variable displacement pump (1)through the shuttle valve (26), (42), and (10), and after the shuttle valve (26), also the feedpressure gauge (21). Fast feed backwards is on until the rear impulse cylinder (130) isactivated the limit switch (125/S81) . At the same time, the rotation pilot control valve (58)is centralized, and rotation is turned off, also fast feed to backwards stops.The return flow from the rock drill rotation motor (54) passes through the rotationdirectional valve (53), the collecting piece (115), the cooler (114), and the return oil filter(113), into the hydraulic oil tank (110).



The return flow from the feed cylinder (28) passes through the feed directional valve (23),the collecting piece (115), the cooler (114), and the return oil filter (113), into the hydraulicoil tank (110).The return flow from the control block of return automatics passes trough the collectingpiece (135) and ends up into hydraulic oil tank (110).The leak oil of the pilot control valves (14), (31) and (58) is directed first to the collectingpiece (135) and from there to the hydraulic oil tank (110).

7.8.1. The function of the return automatics

ON

OFFPERCUSSION

FEED

ROTATION

FRONT LIMIT

START OFDRILLING FRONT LIMIT REAR LIMIT

REAR LIMIT

FAST FEEDBACKWARDS

S70

S71

S72

S80

S81

Y47

ROCK DRILLMOVEMENT

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

FORWARDS

BACKWARDS

START OFDRILLING

FAST FEEDBACKWARDS

DRILLING



When using rock drill with stabilizer oil flows from the connection (P1) of the drillingcontrol block to the pressure reducing and relieving valve (136) and to the control valve(137) of the stabilizer. The control valve (137) of the stabilizer is not activated duringcollaring, drilling, anti jamming automatics, return automatics or threading. In thesesituations the oil flows through the control valve (137) to the pressure switch (138) andto the stabilizer of the rock drill.



117

125123

124 126

127

129 130

121 120

TP

F1

F2

MF MR R1

S80

S81

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

2833102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12




S126

100

50

1

116

188

OUT

OUT

OUT

OUT

IN

IN

IN

IN

B

32

20

44

A2/B2 K2/K4A1/B1 T1/T3 T4

122

111

110

133

113R1


62

58

118119

115 135

5451

57

5352

56

55



7.9. Manual control of fast feed

The manual control of fast feed is a proportional function, i.e. the inclination angle of thecontrol lever for the fast feed pilot control valve (33) determines the speed of fast feed (thebigger the angle the faster the speed). The control lever of the fast feed pilot control valve(33) centralized by a spring. Manual control of fast feed can, for instance, be used forflushing drilled holes.During fast feed (forwards) the system operates as follows:Rotation and percussion are not on in this situation, as the rotation pilot control valve (58)and the percussion pilot control valve (14) are in the central position. Free circulation ofrotation is explained in chapter Free circulation.When the control lever of the fast feed pilot control valve (33) is pulled to the back position,pilot control pressure passes through the shuttle valve (36) to the control line d of the feeddirectional valve (23). Now, the spool of the feed directional valve (23) changes itsposition, and the pressure from the percussion circuit passes through the compensator(22) and the feed directional valve (23) to the feed line A, and to the feed cylinder (28).Feed pressure also passes through the shuttle valves (26), (42), and (10) to the loadsensing line of the variable displacement pump (1), and after the shuttle valve (26) to thefeed pressure gauge (21). The max. feed pressure of fast feed forwards is restricted bythe max. pressure relief valve (25) for the feed line A of the feed directional valve, and bythe fast feed max. pressure relief valve (30) for fast feed backwards.The return flow from the feed cylinder (28) passes through the feed directional valve (23),the collecting piece (115), the cooler (114), and the return oil filter (113), and ends up intothe hydraulic oil tank (110).The leak oil of the pilot control valve (33) is directed first to the collecting piece (135) andfrom there to the hydraulic oil tank (110).When using rock drill with stabilizer oil flows also from the connection (P1) of the drillingcontrol block to the pressure reducing and relieving valve (136) and to the control valve(137) of the stabilizer. The control valve (137) of the stabilizer is not activated duringcollaring, drilling, antijamming automatics, return automatics or threading. In thesesituation the oil flows through the control valve (137) to the pressure switch (138) and tothe stabilizer of the rock drill.



125123

124 126

127

129 130

121 120

TP

F1

F2

MF MR R1

S80

S81

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

28

33102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12




S126

100

117

50

1

116

188

OUT

OUT

OUT

OUT

IN

ININ

B IN

32

20

44

A2/B2 K2/K4A1/B1 T1/T3T4

R1

122

111

110

133

113


62

58

118119

115 135

5451

57

5352

56

55



8. SPECIAL FUNCTIONS

8.1. Threading

Threading means a situation where the drill rod is threaded on or off with a rock drill shank.Threading is done with the control levers for the rotation pilot control valve (58) and thefeed pilot control valve (31).In threading, the system operates as follows:Rotation is turned on by pulling back the control lever of the rotation pilot control valve (58)(if required, the speed of rotation can be adjusted with the regulating valve (59) for rotationspeed). Pull the control lever of the feed pilot control valve (31) backwards to feed the rockdrill forwards at a speed that corresponds to the thread pitch. Keep the feed speedconstant throughout the threading operation. Feed pressure can be adjusted suitable withthe feed pressure regulating valve (20) (normal feed pressure for drilling can be used asthe basic setting).The hydraulic functions of rotation and feed are explained in chapter Rotation, feed andpercussion.When using rock drill with stabilizer oil flows from the connection (P1) of the drillingcontrol block to the pressure reducing and relieving valve (136) and to the control valve(137) of the stabilizer. The control valve (137) of the stabilizer is not activated duringcollaring, drilling, antijamming automatics, return automatics or threading. In thissituation the oil flows through the control valve (137) to the pressure switch (138) and tothe stabilizer of the rock drill.

During threading, rotation pressure must be kept below theantijamming activation pressure. If the pressure rises to this value, feeddirection is reversed.

)*$%



125123

124 126

127

129 130

121 120

TP

F1

F2

MF MR R1

S80

S81

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

28

33102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12




S126

100

117

501

116

188

OUT

OUT

OUT

OUT

IN

IN IN

INB

32

20

44

A2/B2 K2/K4 A1/B1 T1/T3 T4

R1

122

111

110

133

113


62

58

118119

115 135

5451

57

5352

56

55



8.2. Loosen the bit

When the percussion pilot control valve (14) is locked into the front position, pilot controlpressure affects into the percussion selector valve (4) through the shuttle valve (15) andalso into the percussion pressure selector valve (5) through the shuttle valve (16). Thepercussion pressure selector valve (5) changes position and opens the serie connectionbetween feed and percussion. The percussion selector valve (4) opens the percussionmain valve (3), and the output of the variable displacement pump (1) flows through thenonreturn valve (116), the pressure filter (112), the compensator (2), and the percussionmain valve (3) into the percussion mechanism (13). After the orifice (9), the pressureaffects into the pressure compensator (2), and reaches the loadsensing line of thevariable displacement pump (1) through the the shuttle valve (10). The oil flows also viasequense valve (18), monitoring valve (8) and nonreturn valve (19) to the feed pressureregulating valve (20). The pressure level of the percussion depends on now theadjustment of the feed regulating valve (20).The pressure after the percussion main valve also affects into the percussion pressuregauge (11).The return flow from the percussion mechanism (13) passes through the collecting piece(115), the cooler (114), and the return oil filter (113), ending up into the hydraulic oil tank(110).Return flow from the feed regulating valve (20) passes through the directional valve (44),the collecting piece (115), the cooler (114) and the return oil filter (113) ending up into thehydraulic oil tank (110).The leak oil of the pilot control valve (14) is directed first to the collecting piece (135) andfrom there to the hydraulic oil tank (110).When using rock drill with stabilizer oil flows also from the connection (P1) of the drillingcontrol block to the pressure reducing and relieving valve (136) and to the control valve(137) of the stabilizer. The control valve (137) of the stabilizer is activated when usingloosening the thread function (the control lever of percussion in front position). In thissituation there is no pressure in the stabilizer and the oil flows from the stabilizer via theoil collector (115), the oil cooler (114), and the return filter (113) into the hydraulic oil tank(110).



125123

124 126

127

129 130

121 120

TP

F1

F2

MF MR R1

S80

S81

16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

28

33102

103

101

31

14

61

60

59


39

38

37

363534

2930

19

43

137136

138

12




S126

100

117

50

1

116

18 8

OUT

OUT

OUT

OUT

IN

IN

IN

B

IN

32

20

44

A2/B2 K2/K4A1/B1 T1/T3 T4

R1

122

111

110

133

113


62

58

118119

115 135

5451

57

5352

56

55



8.3. Separate flushing

The THC 560 drilling system is equipped with a selector valve (102) for separate flushing.This makes it possible to flush the drilled hole with air or water as a separate function afterthe actual drilling.The selector valve (102) for separate flushing can be locked, so that flushing can be lefton for longer periods. When the separate flushing selector valve is locked into the rearposition, water flushing is turned on, while the front position is for air flushing.When water flushing (selector valve 102) is selected, the separate flushing function is asfollows:When the selector valve is locked to the rear position, the pressure from the pilot controlpressure regulating valve (43) passes through the separate flushing selector valve (102)and the shuttle valve (103) to the water control valve (100), and water flushing is turnedon.

The leak oil of the pilot control valve (102) is directed first to the collecting piece (135) andfrom there to the hydraulic oil tank (110).



16

15

2 3 9 7

10

426

5

4

2622

23

25

24

11

21

132114

13

28

33102

103

101

31

14

61

60

59

112 FROM CARRIERCIRCUIT

39

38

37

363534

2930

19

43

137136

138

12




S126

100

125123

124 126

127

129 130

121 120

TP

F1F2

MFMRR1

S80

S81

501

116

117

188

OUT

OUT

OU

S06 THC 560 Axera 5

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Transcript of S06 THC 560 Axera 5