Air Bleeding Procedure

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 Steering and winch brake pilot pressure pump (double gear pump)

1. Fill the oil tank with hydraulic oil.

2. With the engine stopped, loosen the air-bleed plug (G1/4) on the suction flange of the pump. After bleeding air from the suction side, tighten the plug again.

3. Start the engine (with air conditioner, oil cooler and PTO OFF) and run it at idle (approximately 700 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 Main pump

1. Fill the oil tank with hydraulic oil. (If the suction section was disassembled for repair or other reasons, bleed air from the air-bleed plug on the suction side, as described above.)

2. Bleed the pump case. Remove the drain plug or the drain hose of the pump. Pour the hydraulic oil into this drain port until the oil overflows, then tighten the plug.

3. Start the engine with PTO ON, and run-in the pump at idle for 5 minutes.