50 Hz: G625 - G690 - G750XW/XF
OPERATION & MAINTENANCE MANUAL
56
60 Hz: G655 - G750 - G800 - G850XW/XF
CHANGING THE AIR FILTER ELEMENT
1.
Remove the hex nut, remove the dirty element.
2.
Clean or replace with a new element.
3.
Clean the inside of the filter housing with a damp
cloth.
4.
Replace end cap.
DANGER
Do not let dust enter the end of the air filter.
TURBOCHARGER
The Turbocharger does not need specific maintenance.
When replacing the engine oil, check the oil pipe for
leakage or clogging.
•
Handle the air filter with special care to prevent
foreign substances from getting in.
•
The turbocharged compressed air and exhaust gas
pipe should be checked periodically for air leakage.
Any air can cause the engine to overheat.
CAUTION
Be careful not to bend the turbocharged compressed
air and exhaust gas pipe.
•
If the impeller is severely contaminated, soak only the
wheel in a solvent and clean it thoroughly with a rigid
brush. Be sure to soak only impeller. The
turbocharger should be supported by a bearing
housing, not by an impeller.
ROUTINE CHECK AND SERVING THE
TURBOCHARGER
The turbocharger performance is affected by the
maintenance state of the engine. Regularly perform
inspection and maintenance as specified in order to
maintain turbocharger performance.
1.
Intake system
The air filter should be carefully managed. For a wet
type air filter, the intake resistance should be as small
as possible.
2.
Exhaust system
When exhaust gas leaks from the exhaust pipe or
turbocharger joint, supercharging efficiency is
lowered. Ensure there is no gas leakage as this can
cause serious burns. Heat resistant nuts are used for
parts which become hot during operation, such as the
turbine seal. These nuts must not be mixed with other
nuts. The screw burn prevention paint should be
applied to the assembly nuts at the specified
positions.
3.
Fuel system
If the spray status of the fuel injection nozzle is not
good, or the injection timing is not correct, the exhaust
gas temperature increases to give a negative impact
on the turbocharger. Ensure that the nozzle is tested.
4.
Lubrication system
Ensure that the correct grade of oil is used and the oil
filter cartridge is replaced according to the
maintenance schedule. Degradation of engine oil has
a negative effect on the turbocharger, as well as the
engine body.
DISASSEMBLY AND CLEANING A TURBOCHARGER
Remove the turbocharger from the engine to clean or
inspect it. Be sure to seal the oil inlet and outlet with tape,
etc.
DV2213030A
