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Assembly process No.
A-10
a After disassembling for transpotatiton, changing the oil in the hydraulic tank, or removing hydraulic
cylinders or work equipment piping, bleed the air from the hydraulic circuit as follows.
1. Blade lift cylinder (with piston valve)
1) Start the engine and run at low idling for approx. 5 minutes.
2) With the engine at low idling, extend and retract the cylinder four or five times without operating
it to the end of its stroke.
a Operate the piston rod to approx. 100 mm form the end of the stroke; do not releive the cir-
cuit under any circumstances.
3) Keeping the engine at low idling, extend the cylinder to a point approx. 100 mm before the end of
the stroke, then use fine control (at least 10 seconds) to operate the cylinder to the end of its
stroke. Hold it in this position for 3 minute.
4) With the engine at high idling, extend the cylinder to a point approx. 100 mm before the end of
the stroke, then use fine control (at least 10 seconds) to operate the cylinder to the end of its
stroke. Hold it in this position for 1 minutes.
2. Blade tilt cylinder (without piston valve)
1) Start the engine and run at low idling for approx. 5 minutes.
2) With the engine at low idling, raise and lower the blade four or five times without operating the
cylinder to the end of its stroke.
a Operate the piston rod to approx. 100 mm form the end of the stroke; do not relieve the cir-
cuit under any circumstances.
3) Repeat this operation with the engine at full throttle, the run the engine at low idling and operate
the piston rod to the end of its stroke to relieve the circuit.
k
If from the beginning the engine is run at full throttle; or the cylinders are operated to the end
of their stroke, the piston packing may be damaged, so never operate in this way.
k
Check the oil level, and add oil to the specified level if necessary.
Precautions
Bleeding air from hydraulic cylinders
Necessary tools
Name
Other remarks
46
Necessary equipment
Q'ty
Name
Q'ty
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