Y-4
Y-4
Air Bleeding Procedure
23
WY05-5140E
Y-4 Air Bleeding Procedure
1. Hydraulic pump
[NOTICE]
Be sure that the following conditions are met before
starting the engine.
•
PTO
: OFF
•
Air conditioner : OFF
•
Oil cooler
: OFF
The following is also possible:
After performing step 3. under 1.1, perform step 2.
under 1.2. Start the engine, then turn ON the PTO,
and run-in the pump for 10 minutes.
1.1 Gear pump
1. Fill the hydraulic oil tank with the hydraulic oil.
2. With the engine stopped, loosen the air-bleed plug
(G1/4) on the suction flange of the variable piston
pump. After bleeding the suction side, tighten the
plug again.
3. Start the engine (with air conditioner and oil cooler
OFF and PTO OFF), and run it at idle
(approximately 770 min
-1
) for 1 minute to bleed
the circuit.
4. Start the engine, and run-in the pump for 10
minutes at idle.
1.2 Variable piston pump
1. Fill the hydraulic oil tank with the hydraulic oil. (If
the suction section is disassembled due to repair
or other reasons, bleed the suction side from the
air-bleed plug on the suction side as described
above.)
2. Bleed the pump case. Remove the air-bleed plug
(G3/8) on top of the pump.
Pour the hydraulic oil into this plug until the oil
overflows, then tighten the plug again.
3. Start the engine with the PTO ON, and run-in the
pump at idle for 5 minutes.
Содержание GR-130EX
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