MAINTENANCE PROCEDURE MAINTENANCE
4-80
REPLACE PILOT FILTER CARTRIDGE 4
Immediately after the engine is stopped, the oil and parts are at high temperature, and this will cause
burns. Wait for the temperature to go down before starting the operation.
1. Using the filter wrench, turn filter cartridge (1) to the left
and remove it.
2. Fill the new filter cartridge with hydraulic oil, coat the pack-
ing surface with oil, then install. When installing, bring the
packing surface into contact with the seal surface of the fil-
ter holder, then tighten a further 1/2-3/4 turns.
When replacing the cartridge, check if there are any iron
particles or foreign material stuck to the bottom of the fil-
ter case or the outside of the cartridge. If such materials
are stuck to the cartridge of filter case, there is probably
an abnormality in the hydraulic circuit.
Please ask your Komatsu distributor to carry out inspec-
tion and repair.
CHECK OIL LEVEL IN SWING MACHINERY CASE, ADD OIL 4
(Front, rear swing machinery case)
For details of the method of draining and adding swing machinery case oil to machines equipped with a service
center (option), see “Method of Draining, Adding Swing Machinery Case Oil (Front) (6-22), Method of Draining,
Adding Swing Machinery Case Oil (Rear) (6-23)“.
1. Check the oil level with dipstick (G).
2. Add power train oil through the inserting port of oil level gauge (G) if the oil level does not come between H
and L marks.
q Front swing machinery
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