Komatsu WA480-8, Руководство по эксплуатации и техническому обслуживанию

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9.
When installing the cartridge, tighten it until the packing surface contacts the sealing surface of the filter
head, then tighten it 1/2 to 3/4 turn.
REMARK
If the filter cartridge is fastened too much, the packing will be damaged and this leads to leakage of fuel. If
the filter cartridge is too loose, fuel will also leak from the packing. Therefore, be sure to observe the tight-
ening angle.
When tightening with a filter wrench, be extremely careful not to dent or damage the filter.
10. Install drain hose.
11. Check that drain valve (1) is closed securely.
12. After replacing the filter cartridge, start the engine and run it at low idle for 10 minutes.
13. Check for leakage of fuel from the filter seal surface and transparent cup mounting face.
If there is any leakage, check the tightening condition of the filter cartridge.
If there is still fuel leakage, perform steps 1 to 5 to remove the filter cartridge, and if any damage or pinched
foreign material on the packing surface is found, replace it with a new cartridge and repeat steps 6 to 12.
EVERY 1000 HOURS MAINTENANCE
Maintenance for every 50, 100, 250 and 500 hours service should be performed at the same time.
METHOD FOR REPLACING FUEL MAIN FILTER CARTRIDGE
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WARNING
• Immediately after the engine is stopped, the parts are still very hot. Do not replace the filter immedi-
ately. Wait until all of parts cool down before starting the work.
• 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 open flame close.
• When using the fuel feed pump, do not loosen the air bleeding plug of the fuel circuit. The fuel cir-
cuit is pressurized while the fuel feed pump is operated. If the air bleeding plug is loosened at this
time, fuel may spout out and it is dangerous.
NOTICE
• Komatsu genuine fuel filter cartridges use a special filter that has highly efficient filtering ability.
When replacing parts, Komatsu recommends using Komatsu genuine parts.
• The common rail fuel injection system used on this machine consists of more precise parts than
those in the conventional injection pump and nozzles. If any cartridge other than a Komatsu genu-
ine filter cartridge is used, dust or dirt may get in and cause problems with the injection system.
Never use a substitute.
• When performing inspection and maintenance of the fuel system, be careful not to let any dirt or
dust get in, more than ever before. If dust sticks to the fuel system, wash it off thoroughly with fuel.
Items to be prepared
• Container to catch drained oil
• Filter wrench
MAINTENANCE MAINTENANCE PROCEDURE
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