Method For Replacing Air Conditioner Fresh/Recirc Filters - Komatsu D37EX-24 Operation & Maintenance Manual

MAINTENANCE
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. Be sure to observe the tight-
ening angle.
• When tightening by using a filter wrench, be extremely careful not to dent or damage the filter.
14. Confirm that the drain valve (4) at the bottom of the transparent cup (5) is tightened securely.
15. Turn the fuel supply valve (1) to OPEN position (O).
16. Bleed the air.
1)
Fill up the fuel tank with fuel (to the level where the
float is at the highest position).
2)
Loosen the knob of feed pump (7), pull it out, then
pump it in and out until the movement becomes
heavy.
REMARK
• It is not necessary to remove the plugs at the fuel
prefilter head and at the fuel main filter head.
• When the engine runs out of fuel, use the same
procedure to operate the feed pump (7) and bleed
the air.
3)
After bleeding air, push in the knob of feed pump (7)
and tighten it.
17. Turn the starting switch key to START position (C) and
start the engine.
18. Check the filter seal surface and the mounting face of the
transparent cup for fuel leakage.
If there is any leakage of fuel, check the tightening condi-
tion of the filter cartridge.
If the fuel still leaks, remove the filter cartridge again, and
check the packing surface for damage or foreign material.
If the packing surface is damaged or there is any foreign
material on it, replace the filter cartridge with a new one,
install the filter cartridge according to the preceding procedure, and then bleed air from the fuel circuit.
19. Run the engine at low idle for approximately 10 minutes.
20. After the replacement is completed, close the engine side cover and the fuel tank inspection cover.

METHOD FOR REPLACING AIR CONDITIONER FRESH/RECIRC FILTERS

Since the filtering ability of the filters decreases as they are aged, replace them every 500 operating hours or
every year.
MAINTENANCE PROCEDURE
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