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BHL 2004.02 1(4)

Backhoe Loader BL71

2 Engine

Make / Model / Product No. .............................Volvo D4DCBE2 Turbo

Idling speed, r/s (rpm)

 – low...............................................................15.1 (900)

 – high .............................................................39.9 (2380)

 – hand throttle control position 1 ....................15.0 (900)

 – hand throttle control position 2 ....................38.8 (2330)

Economic working range, r/s (rpm)..................20–26.7 (1200–1600)

Valve clearance

 – inlet, mm (in) ...............................................0.35 (0.014) ± 0.05 (0.002)

 – exhaust, mm (in) .........................................0.55 (0.022) ± 0.05 (0.002)

Lubricating oil pressure > 1100 rpm,MPa (psi) .........................................................0.45 (65.3)

3 Electrical system

System voltage, V............................................12

 Alternator, output, kW (hp)...............................1.3

 Alternator charging current intensity/voltage, A / V.................................................................95 / 14

Battery capacity, Ah.........................................110

4 Transmission

Model / Product No. ........................................Powershuttle with torque converter 

Disengagement pressure, MPa (psi)

 – neutral .........................................................0.03 (4.4)

 – clutch pressure, high idling..........................1.1–1.3 (160–189)

 – torque converter output pressure................0.05–0.9 (7.3–13.1)

 – lubricating oil pressure ................................0.5 (72.5)

Drive axles

Model

 – front .............................................................Steer axle

 – rear..............................................................Non steer SAHR

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2(4) BHL 2004.02

BL71

5 Brakes

Service brakes, type ........................................Single circuit, oil immersed

 – number of discs per side, rear.....................3

 – number of brake counter discs, rear............4 – brake friction area per wheel, cm2 (in2).......178.4 (27.7)

 – brake disc thickness, new, mm (in) .............4.8 (0.19)

 – brake disc thickness, min., mm (in) .............4.4 (0.17)

 – brake disc counter discs, new, mm (in) .......5.9 (0.23)

 – maximum operating pressure MPa (psi) .....4.3 (624)

Parking brake, type..........................................Self adjusting oil immersed multidisc

6 Steering

Type.................................................................Load sensing hydrostatic

Flow (in common with working hydraulics)at 16.4 r/s (1000 rpm) (1152 Hz),litres/min. (US gal/min.) ...................................12.5 (3.3)

Max working pressure, MPa (psi) ....................17.5 (2538)

Operating time between full locks

at 16.7 r/s (1000 rpm) (1152 Hz), seconds......2.2Overload relief valves (shock valves),opening pressure, MPa (psi)............................24.0 (3480)

Air condition

Filling amount of refrigerant R134a,kg (lb)............................................................... 1.45 (3.2)

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BHL 2004.02 3(4)

BL71

9 Hydraulic system

Type.................................................................Variable flow, closed centre, loadsensing, flow sharing system

Hydraulic pumpType.................................................................Axial piston pump,variable displacement

Flow at 36.7 r/s (2200 rpm) and at apressure of 25 MPa (3626 psi)per minute, litres (US gal) ................................160 (42)

Return pressure MPa (psi)...............................0.8–1.0 (116–145)

Max working pressure, MPa (psi) ....................25 (3626)

Stand-by pressure function, MPa (psi) ............3.0 (435)

Displacement, cm3 (in3) ...................................74 (4.52)

Servo system

Type.................................................................Gear pump

Displacement, cm3 (in3) ...................................8 (0.5)

Flow at 36.7 r/s (2200 rpm), litres (US gal)......16 (4.2)

Servo pressure, MPa (psi) ...............................3.9 (566)

Main control valve

Type.................................................................Backhoe and loader valve block,10 spools. Optional valve blockto operate extendible dipper andmulti-purpose bucket, 2 spools.Compensated flow sharing.

Shock valves opening pressure, MPa (psi)

 – A1 loader bucket .........................................30.0 (4351)

 – B1 loader bucket .........................................30.0 (4351) – A2 slew movement......................................25.0 (3626)

 – B2 slew movement......................................25.0 (3626)

 – A3 boom......................................................26.0 (3771)

 – B3 boom......................................................35.0 (5076)

 – A6 dipper arm..............................................30.0 (4351)

 – B6 dipper arm..............................................30.0 (4351)

 – A7 backhoe bucket......................................30.0 (4351)

 – B7 backhoe bucket......................................30.0 (4351)

 – B10 multi-purpose bucket ...........................30.0 (4351)

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4(4) BHL 2004.02

BL71

Operating times, seconds

Operating times at 25 r/s (2200 rpm) (1725 Hz) with SAE load

Loader unit

 – lifting............................................................4.5 – lowering.......................................................3.0

 – forward tilting...............................................1.7

 – backward tilting............................................1.9

Backhoe unit

 – slew not including damping .........................1.6

 – dipper arm out .............................................2.8

 – dipper arm in ...............................................2.7

 – bucket open.................................................1.7

 – bucket close ................................................2.2

 – boom up ......................................................3.9

 – boom down..................................................4.1

 – stabilisers, up ..............................................2.1

 – stabilisers, down..........................................2.1

 – extendible dipper arm, in.............................3.3

 – extendible dipper arm, out...........................3.2

Tightening torques

See torque chart in Service Manual under Specifications.

Wheel nuts, Nm (lbf ft)

 – front .............................................................300 ±15 (221 ±11)

 – rear ..............................................................600 ±50 (443 ±37)

Service capacities, litres (US gal)

Engine incl. filter ..............................................13.0 ±0.5 (3.4 ±0.1)

Transmission ...................................................14.5 ±0.5 (3.8 ±0.1)

Front axle

 – housing........................................................6.5 ±0.5 (1.7 ±0.1)

 – hubs (in each) .............................................0.8 (0.2)

Rear axle

 – housing........................................................13.0 ±0.5 (3.4 ±0.1) – hubs (in each) .............................................1.5 (0.4)

Hydraulic oil tank .............................................42.0 ±1.0 (11.1 ±0.3)

Fuel tank ..........................................................120.0 (31.7)

Cooling system ................................................15.0 (4.0)