Replace Hydraulic Oil Filter Element - Komatsu PC18MR-3 Operation & Maintenance Manual

MAINTENANCE PROCEDURE

REPLACE HYDRAULIC OIL FILTER ELEMENT

When this maintenance is carried out, it is necessary to open (tilt) the floor.
Before starting the operation to open the floor, read the precautions in "CAUTIONS FOR OPENING (TILTING) FLOOR (PAGE
2-34)" in the safety and maintenance sections thoroughly, and refer to the explanation for each part in "METHOD OF OPENING
(TILTING) FLOOR (PAGE 3-23)" when carrying out the operation. Or ask your Komatsu distributor to carry out the
maintenance.
Immediately after the engine is stopped, the parts and oil are at a high temperature, and will cause burns. Wait for the
temperature to go down before starting the operation.
When removing the oil filler cap, oil may spurt out, so turn it slowly to release the internal pressure before removing it.
NOTICE
If the machine is equipped with a hydraulic breaker, the hydraulic oil will deteriorate much faster than during normal bucket
operations. For details, see "MAINTENANCE INTERVAL FOR HYDRAULIC BREAKER (PAGE 4-15)" when carrying out
maintenance.
1. When opening (tilting) the floor, see "When Opening (tilt open) (PAGE 3-23)" for details.
2. Loosen bolt (1), then remove plate (2).
3. Remove the cap from oil filler (F), and release the internal
pressure.
4. Remove bolts (3), then remove cover (4). When this is done,
the cover may fly off under the force of spring (5), so keep the
cover pushed down when removing the bolts.
5. After removing spring (5) and valve (6), take out element (7).
6. Clean the removed parts in diesel oil.
7. Install the new element where old element (7) was installed.
Inspect the O-ring set between the hydraulic tank and cover
(4). If there are any scratches, replace the O-ring.
8. Set valve (6) and spring (5) on top of the element.
9. Set cover (4) in position, hold it down by hand, and tighten
cover mounting bolts (3) to install cover (4).
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WARNING
MAINTENANCE