. MAINTENANCE SERVICE PROCEDURE REPLACE FUEL PRE-FILTER CARTRIDGE WARNING 4 - 52 After the engine has bee n operated, all parts are at high t emperature, s o do not replace the filter imm ediately. Wait for all parts to cool down before star ting the operation. ed inside the engine fuel piping system when the engine is running. High pressure is generat ed inside the engine fuel piping system whe When replacing the filte r, wait for at least 30 seconds a fter stopping the engine to let the internal pressure go down before replacing the filter. lame close.
Do not bring any fire or f NOTICE Genuine Komatsu fuel fi lter cartridges use a special filt er that has h ighly efficient filtering ability. When replacing the filter cartridge, always use a g enuine Komatsu part. The common rail fuel inj ection system used on this ma chine consist s of more precise parts than the conventional injection pump and nozzle. If any part other than a g enuine Komatsu filter cartridge is used, dust or dirt may get in and cause p roblems with the injection system. Always avoid u sing substitute parts. When carrying out inspe ction or maintenance of the fue l system, pay more attention than normal t o the entry of dirt.
If dirt is stuck to any part, use fu el to wash it off completely. Container to catch the Prepare a filter wrenc 1. Open the engine sid e cover on the right side of t he chassis. 2. The fuel pre-filter for ms one unit with the water s eparator an d is installed at the center 3. Set a container to ca tch the oil under filter cartrid ge (1). separator t 4. Using the filter wren ch, turn cap (2) of the water the left to remove it. or broken, replace it 5. Using a filter wrenc remove it. (This cap is used again. If it is damage with a new part.) h, turn the filter cartridge (1) to the left t 6.
Install cup (2) to the When doing this, alw Tightening torque fo When replacing the before installing it. bottom of the new fuel pre-filter cartridg ays replace the seal ring with a new par r cup: 10 Nm {1.0 kgm} ith clean fu 7. Check that drain plu pre-filter is tightened Tightening torque: 0 .2 - 0.45 Nm {0.02 - 0.046 k 8. Clean the filter holde