50 Hz: G625 - G690 - G750XW/XF
OPERATION & MAINTENANCE MANUAL
59
60 Hz: G655 - G750 - G800 - G850XW/XF
2.
Tightening cylinder head bolts after a repair. (Engine
cold).
1.
Tighten temporarily 1~2 threads by hands.
2.
1st step: Tighten to approximately 8kgf•m with a
wrench.
3.
2nd step: Tighten to approximately 15kgf•m with a
wrench.
4.
3rd step: Rotate 90° with a wrench.
5.
Final step: Rotate 90° with a wrench.
CAUTION
Excessive torque may damage the cylinder head
gasket, cylinder liner flange and cylinder head bolt.
Ensure to use the specified torque settings.
When tightening cylinder head bolts after a repair,
always adjust the valve clearance.
6.
After the first 10 to 20 hours of operation after a repair
turn the cylinder head bolts by a further 90° (1/4
revolution).
CAUTION
Do
not
loosen
cylinder
head
bolts
before
re-tightening. Tighten them by turning by a further
90° (1/4 revolution) from their actual position.
7.
After 400 hours of operation turn the cylinder head
bolts by a further 90° (1/4 revolution).
CAUTION
The two outside screws (intake and exhaust side)
must not be retightened.
Do
not
loosen
cylinder
head
bolts
before
re-tightening. Tighten them by turning by a further
90° (1/4 revolution) from their actual position.
When a cylinder head has been removed the cylinder
head gasket must always be changed.
CYLINDER COMPRESSION PRESSURE
1.
Start and warm up the engine.
2.
Stop the engine and disassemble the fuel injection
nozzle holder assembly.
3.
Install a special tool, compression pressure gauge
adapter (EU.2-0532), in the fuel injection nozzle
holder hole.
4.
Connect the compression pressure gauge to the
adapter.
DV2213045A_E
Intake side injector
Exhaust side
Standard
Above 28kg/cm
2
Tolerance limit
24kg/cm
2
Difference between each
cylinder
Within ±10%
DV2213046A
