Operation & Maintenance Manual──LG968 /969Wheel Loader
82
shut the engine.
z Operate the working equipment control handle to let the bucket tilt forward freely by its weight,
release the oil in bucket cylinder. After the bucket tilt to the position, push the working equipment
control handle forward to let the lift arm fall down by freely by its weight, release the oil in lift
arm cylinder.
z Clean the oil drain port at the bottom of hydraulic oil box, rotate to open the oil releasing
spherical valve to release the oil to container. Open the oil inlet cover at the same time to quicken
draining.
△
! WARNING
The temperature of hydraulic oil may be high please wear
protective clothes, and operate carefully to prevent self
hurt.
z Disassemble the flange cover of oil box, clean the inner part and the oil inlet port and oil recycle
elements, if the elements are broken please replace with new one.
z Assemble the flange cover and oil releasing spherical valve again tightly.
z Add prescriptive oil from oil inlet port at the left top side of bench frame, until the oil lever reach
the middle of oil lever indicator. Rotate the oil inlet port cover. Never add oil directly to oil tank
without oil filter elements.
z Start engine, raise and lower lift arm, tilt forward and backward the bucket to the most position
2~3 times to let the hydraulic oil fill the cylinders and pipes sufficiently. And run the engine at
idle status for 5 minutes to release the air of system.
z Shut the engine, check the oil level, if there is not enough oil, add some more.
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