4. Regular inspection
61
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 resistance
should be small as possible.
2. Exhaust system
For the exhaust system, when exhaust gas leaks from
the exhaust pipe or turbocharger joint, supercharging effi-
ciency 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 operation,
such as the turbine seal, and the nuts should not be
mixed with other nuts. The screw burn prevention 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.
Do not let dust come into the end of air filter.
Be careful not to bend it.
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