Clean Engine Breather Element; Check Alternator, Starting Motor - Komatsu D155A-6 Operation & Maintenance Manual

MAINTENANCE MAINTENANCE
3. Loosen 6 bolts, then remove cover (3). When doing this, the
cover may fly out under the force of spring (4), so push the
cover down when removing the bolts.
4. After removing spring (4), valve (5) and strainer (6), take out
element (7).
Inspect the bottom of the filter case for dirt, and remove it, if
any. Take good care then not to let fall the dirt into the
hydraulic tank.
5. Clean the removed parts in flushing oil.
6. Install the new element in the place where old element (7) was
installed.
7. Set valve (5), strainer (6) and spring (4) on top of the element.
8. Set cover (3) in position, push it down by hand, and install the
cover with the mouning bolts.
9. Screw in the oil filler cap and install the cover.
10. To bleed the air, start the engine according to "STARTING
ENGINE (PAGE 3-116)" and run the engine at low idle for 10
minutes.
11. Stop the engine.
12. After filling with oil, check that the oil is at the specified level. For details, see "CHECK OIL LEVEL IN
HYDRAULIC TANK, ADD OIL (PAGE 3-105)".

CLEAN ENGINE BREATHER ELEMENT

1. Wipe off all the dirt from around the breather (1).
2. Remove breather (1).
3. Rinse the breather unit in diesel oil or flushing oil, then dry with
compressed air.
4. Replace the breather O-ring with a new part, coat with engine
oil, then install.

CHECK ALTERNATOR, STARTING MOTOR

The brushes may be worn or the bearing may have run out of grease, contact your Komatsu distributor for inspection
and repairs.
If the engine is started frequently, have this inspection carried out every 1000 hours.
SERVICE PROCEDURE SERVICE PROCEDURE
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