SERVICE PROCEDURE MAINTENANCE
302
EVERY 5000 HOURS SERVICE
Maintenance for every 100, 250, 500 and 1000 hours should
be carried out at the same time.
CHANGE OIL IN HYDRAULIC TANK
WARNING
● The parts and oil are still at high temperature after the
engine is stopped, and may cause serious burns. Wait for
the temperature to go down before servicing the hydrau-
lic tank.
● When the oil filler cap is removed, oil may spurt out, so
turn the cap slowly to release the internal pressure, then
remove it carefully.
Prepare the following.
● Refill, capacity: 120 litres
● Prepare a handle for the socket wrench set.
1. Retract the arm and bucket cylinders to the stroke end, then
lower the boom and put the bucket teeth in contact with the
ground.
2. Lock the safety lock lever and stop the engine.
3. After the tank has cooled, remove the cap from oil filler (F) on
the hydraulic tank.
4. Set an empty oil container under the drain plug under the
machine. Remove drain plug (P) and drain the oil.
Check the O-ring installed on plug (P). If it is damaged,
replace the O-ring. After draining the oil, tighten drain plug
(P).
Tightening torque: 69 ± 10 N•m.
When removing drain plug (P), be careful not to get oil on your-
self.
5. Add the specified amount of engine oil through oil filler port
(F).
Check that the oil level is midway between H and L on the
sight gauge.
For details of the method of bleeding the air, see "CHECK
OIL LEVEL IN HYDRAULIC TANK, ADD OIL (272)".
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