Yuchai YC135, Operation And Maintenance Manual

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19.5.4. Replacing the hydraulic oil return filter
P
RECAUTION WITH OIL AT HIGH TEMPERATURE
•
After the machine operated, hydraulic oil is at high
temperature, so wait for temperature cool down.
•
Unfasten the top slowly to reduce the pressure inside
the oil tank.
1. Park the machine on a level and solid ground.
2. Start the engine and keep it at he low idling,
lower down the dozer blade, then raise the
boom and extend the arm and bucket
cylinders, until the machine will be as
showed beside.
3. Let the engine run for 5 minutes, then stop it.
4. Demount the 4 bolt on the oil tank top (1).
5. Unscrew the cover (2) of oil tank.
6. Remove the hood (3) of the hydraulic oil tank.
7. Remove the spring (4), the valve (5) and the return filter from the tank.