Komatsu WA20-2, Operation & Maintenance Manual

Page: 170 / 195

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24.7 EVERY 1000 HOURS SERVICE
Maintenance for every 50, 250 and 500 hours service should be
carried out at the same time.
24.7.1 CHANGE OIL IN HYDRAULIC TANK, REPLACE
HYDRAULIC OIL FILTER CARTRIDGE AND HST
FILTER ELEMENT

WARNING
The oil is at high temperature immediately after the machine
has been operated.
Wait for the oil to cool down before changing the oil.
When removing the oil filler cap, turn it slowly to release the
internal pressure, then remove it carefully.
Prepare the following.
‡
Container to catch drained oil:
WA20 Min. 15 ¬ capacity
WA30, 40, 50 Min. 28 ¬ capacity
‡ Refill capacity: WA20 15 ¬ (4.0 US gal, 3.3 UK gal)
WA30, 40, 50 28 ¬ (7.4 US gal, 6.2 UK gal)
1. Lower the bucket horizontally to the ground and apply the
parking brake, then stop the engine.
2. When removing the oil filler cap 2 , turn it slowly to release the
internal pressure, then remove it carefully.
3. Set a container under drain plug P to catch the oil.
4. Remove drain plug P to drain oil.
5. After draining the oil, tighten drain plug P .
6. Remove filter cartridge 1 by turning with a wrench.
7. Clean the filter holder, fill the new filter cartridge with engine oil,
then coat the packing of cartridge with engine oil or grease and
install the cartridge.
24. SERVICE PROCEDURE 24. SERVICE PROCEDURE