Every 500 Hours Service; Replace Fuel Pre-Filter Cartridge - Komatsu D155A-6 Operation & Maintenance Manual

SERVICE PROCEDURE

EVERY 500 HOURS SERVICE

Maintenance for every 250 hours should be performed at the same time.

REPLACE FUEL PRE-FILTER CARTRIDGE

After the engine has been operated, all parts are at high temperature, so do not replace the filter immediately. Wait for all parts
to cool down before starting the operation.
High pressure is generated inside the engine fuel piping system when the engine is running.
When replacing the filter, wait for at least 30 seconds after stopping the engine to let the internal pressure go down before
replacing the filter.
Do not bring any fire or flame close.
NOTICE
Genuine Komatsu fuel filter cartridges use a special filter that has highly efficient filtering ability. When replacing the filter
cartridge, always use a genuine Komatsu part.
The common rail fuel injection system used on this machine consists of more precise parts than the conventional injection
pump and nozzle.
If any part other than a genuine Komatsu filter cartridge is used, dust or dirt may get in and cause problems with the injection
system. Always avoid using substitute parts.
When carrying out inspection or maintenance of the fuel system, pay more attention than normal to the entry of dirt. If dirt is
stuck to any part, use fuel to wash it off completely.
Container to catch the oil
Prepare a filter wrench
1. Set a container to catch the oil under filter cartridge (1).
2. Using the filter wrench, turn transparent cap (2) to the left.
(This cap is used again.)
3. Using the filter wrench, turn filter cartridge (1) to the left to
remove it.
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WARNING
MAINTENANCE