5-55
MAINTENANCE
EVERY 4000 HOURS
4. Hold the hose fitting (A) in place with a
wrench and slowly loosen the hose nut (1).
5. Slowly move the boom in the “Boom
lower” direction a little until there are no
more air bubbles coming from the hose
nut (1) joint.
6. Hold the hose fitting (A) in place with a
wrench and tighten the hose nut (1).
4. Loosen the hose (B) slowly.
5. Slowly move the arm in the “Arm in”
direction a little until there are no more air
bubbles coming from the hose (B) joint.
6. Tighten the hose (B).
• Emergency shut-off valve
This operation is dangerous and requires
experience. Ask your sales or service
dealer for help.
If air is not released, the working
equipment could become slow in reacting
to the operation of the operator and show
unexpected behavior.
When removing plugs or screws, or when
disconnecting hoses, stand to the side
and loosen them slowly to gradually
release the internal pressure before
removing.
1. Place a pan under the hose (A) or (B) to
catch the waste oil.
2. Start the engine and run it at low idle.
3. Fully lower the safety lock lever to the
unlock position.
Boom
Arm
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