7/29/2019 6WG1-TQA Workshop Manual N2223 Ex

1/3

GENERAL INFORMATION

ENGINE EXTERNAL VIEW

Oil filler cap

PCV

SM7700

Crank pulleyAlternator

Thermostat housing

Water pump

Oil port cover

Inlet duct

Fuel filter

Oil dipstickFuel pump

Injection pump

Coupling cover

Oil drain plugBreather hose

Starter motor

Fan pulley

Water outlet pipe

Water draing plug Water inlet pipe

TurbochargerExhaust manifold

Cooling fan

7/29/2019 6WG1-TQA Workshop Manual N2223 Ex

2/3

GENERAL INFORMATION

MAIN DATA AND SPECIFICATIONS

ITEMS 6WG1TQA

Engine type Four cycle, water cooled, in-line, overhead camshaft,direct injection

Combustion chamber Open type in piston crown

Cylinder liner Dry type

Timing drive system Gear drive

No. of cylinders - bore x stroke mm (in) 6 - 147 x 154 (5.79 x 6.06)

Rated output kW/min-1 235.4/1800

Max. torque Nm/min-1 1274.9/1500

No. of piston rings Four rings (Compression rings: 3, Oil ring: 1)

Total piston displacement L (cid) 15.681 (956.9)Compression ratio (to 1) 16.4

Compression pressure at 200 min-1

MPa (kg/cm2/psi) 2.94 (30/426) or more

Engine dimensions mm (in) 1,642 x 1007 x 1,287 (64.6 x 39.6 x 50.7)

Engine weight (Dry) kg (lb) 1,252 (2,764)

Fuel injection order 1 - 5 - 3 - 6 - 2 - 4

Fuel injection timing (TDC) deg 10

Specified fuel type SAE No.2 diesel fuel

Idling speed min-1 900

Valve clearances Intake mm (in) 0.40 (0.016)Exhaust mm (in) 0.40 (0.016)

Intake valves Open at (BTDC) deg 21

Close at (ABDC) deg 27

Exhaust valves Open at (BBDC) deg 52

Close at (ATDC) deg 17

Injection pump Bosch, in-line P-Type

Governor type Mechanical

Injection nozzle Multi-hole type

Injection nozzle opening pressure

MPa (kg/cm2/psi) 19.9 (203/2,886)Main fuel filter type Paper element

Lubrication system

Lubrication method Full flow pressure circulation

Specified engine oil (API grade) CD

Oil pressure (at oil gallery)

kPa (kg/cm2/psi)/min-1 300 (3.1/44.1)/1,200

390 (4.0/56.9)/2,000

Condition: SAE 30 API CD grade engine oil at an

oil temperature of 80 C (176 F)

Oil pump type Gear (Timing gear drive)

7/29/2019 6WG1-TQA Workshop Manual N2223 Ex

3/3

ENGINE OVERHAUL

SM7785

Inspection and Repair

Make the necessary adjustments, repair and partreplacements if excessive wear or damage is discov-ered during inspection.

BRIDGE

Inspect any cracking, damage on bridge and inspectany separation wear out and damage on the surface ofbridge

CLEARANCE BETWEEN CAMSHAFT AND

BRACKET

Measure the clearance between the camshaft andcamshaft bracket.

Standard: 0.065 - 0.125 mm (0.0026 - 0.0049 in)

Limit: 0.15 mm (0.0059 in)

SHAFT IDLE GEAR "C" AND IDLE GEAR "C"

1. Measure the outside diameter of shaft idle gearC.

Standard: 48.93 - 48.96 mm (1.9264 - 1.9286 in)

Limit: 48.85 mm (1.9232 in)2. Measure the clearance between the shaft and idle

gear "C".

Standard: 0.04 - 0.105 mm (0.0016 - 0.0041 in)

Limit: 0.2 mm (0.0079 in.)

SM7784 SM7786

VALVE SPRING

1. Use a vernier calmer to measure the valve springfree height. If the measured value is less than thespecified limit, the valve spring must be replaced.Valve spring free height

Inlet spring:

Standard: 79.3 mm (3.122 in)

Limit: 75.3 mm (2.965 in)

Exhaust spring: outer

Standard: 102.7 mm (4.0433 in)

Limit: 97.6 mm (3.0843 in)

Exhaust spring: inner

Standard: 96.4 mm (3.0795 in)

Limit: 91.7 mm (3.0610 in)