4. Regular inspection
63
Changing the air filter element
1. Remove the hex nut, remove the dirty element.
DV2213030A
2. Replace with a new one or wash it.
3. Using a wet rag, wipe the inside of the filter housing.
4. The sealing contact of element.
Turbocharger
The Turbocharger does not need a specific maintenance.
Whenever replacing the engine oil, check oil pipe for
leakage or clogging.
•
You should handle the air filter with special care to
prevent foreign substance from getting in.
•
The turbocharged compressed air and exhaust gas
pipe should be checked periodically. Air leakage
causes engine overheat, so repair is required.
•
If the impeller is severely contaminated, soak only the
wheel in a solvent and clean it with a rigid brush thor-
oughly. Here, be sure to soak only impeller, and the
turbocharger should be supported by a bearing
housing, not by an impeller.
Routine check and serving the turbocharger
The turbocharger performance is determined by mainte-
nance state of the engine. So you should regularly
perform inspection and check as specified.
1. Intake system
For the intake system, the air filter should be carefully
managed. For a wet type air filter, the intake resis-
tance should be small as possible.
2. Exhaust system
For the exhaust system, when exhaust gas leaks from
the exhaust pipe or turbocharger joint, supercharging
efficiency is lowered. So you need to pay attention to
prevent gas leakage and burn. Heat resistant nuts are
used for parts which are highly heated during opera-
tion, such as the turbine seal, and the nuts should
not be mixed with other nuts. The screw burn preven-
tion paint should be applied to the assembly nuts of
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. So, the nozzle should be tested.
4. Lubrication system
For the lubrication system, pay attention with the oil
quality and the replacement time of the cartridge of
the oil filter. Degradation of engine oil has bad effect
on the turbocharger, as well as the engine body.
Disassembly and cleaning a turbocharger
You can disassemble the turbocharger from the engine
to clean or inspect it. Here, be sure to seal the oil inlet
and oulet with a tape, etc.
DANGER
Do not let dust come into the end of air filter.
CAUTION
Be careful not to bend it.
