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MAINTENANCE
Bleed the air as follows:
16. Fill the fuel tank with fuel (to the position where the float is at the highest position).
17. 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 plug at the top of the fuel pre-filter and fuel main filter.
After the engine runs out of fuel, use the same procedure to operate feed pump (7) and bleed the air.
18. After finishing to bleed air, push in the knob of feed pump (7) and tighten it.
19. After replacing the filter cartridge, start the engine and run it at low idling for 10 minutes.
Check for leakage of oil from the filter seal surface and tranparent cap mounting. If any oil is leaking, check the
tightening of the filter cartridge.
If there is still oil leakage, repeat Steps 1 - 7 to remove the filter cartridge, and if any damage or embedded
foreign material in the packing surface is found, replace it with a new cartridge and repeat Steps 8 - 19 to install
it.
REMARK
Sometimes some air is still left inside water separator (3) after air bleeding, but the engine can be started by
operating feed pump (7) until its motion gets hard. The remaining air is naturally bled when the water separator is
left as it is for some time after the engine comes to a stop.
CHECK SWING PINION GREASE LEVEL, ADD GREASE
Prepare a scale.
1. Remove bolts (1) (2 bolts) on the top of the revolving frame and
remove cover (2).
2. Insert scale (3) into the grease through inspection and
adjustment hole (A). Check that the height of grease (S) in the
area passing the pinion is at least 9 mm (0.355 in). Add grease
if the level is low.
3. Check if the grease is milky white. If it is milky white, it is
necessary to change the grease. Please contact your
Komatsu distributor.
Total amount of grease
PC200: 14.6 liters (3.86 US gal)
PC220: 15.8 liters (4.17 US gal)
4. Install cover (2) with bolts (1).
MAINTENANCE PROCEDURE
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