Air Bleeding Procedure

2. Service brake circuit

[NOTICE]

The vehicle has two boosters; one for the front wheel brakes and the other for the rear wheel brakes.

Two air bleeder screws are on the calipers for the front wheel brakes, and two are on those for the rear wheel brakes.

Take care of the spill of the brake fluid and the fluid level in the fluid reservoir while bleeding.

1. With the sufficient air in the air reservoir, depress the brake pedal and loosen the air bleeder screw on the booster.

2. Then tighten the air bleeder screw before releasing the brake pedal.

3. Repeat the above steps until the flowing brake fluid contains no air bubbles. After the air bubbles go out, tighten the air bleeder screw while letting the oil flow out.

3. Swing circuit

3.1 Swing motor

[NOTICE]

Do not apply any load to the motor before performing air bleeding.

Bleed the swing motor by following either (1), (2) or (3).

1. Pour the hydraulic oil through the drain port into the casing until the oil flows out.

2. Perform the right or left swing operation slowly for approx. one minute.

3. Set the swing brake switch to ON. Perform the right or left swing operation and keep the swing circuit hydraulic pressure at approx. 4.9MPa (710 psi) for approx. 30 seconds.

Swing motor

Drain port (G 3/8)

IWY05-0130E04

3.2 Swing control back-pressure valve

[NOTICE]

4. Bleed the calipers of the axles as the step 1 above.

Conditions

Engine speed : Max. PTO : ON

Swing brake : ON

1. Open the air-bleed plug and rapidly switch the swing lever repeatedly between swing left and swing right.

2. When there are no more bubbles in the oil that flows out, close the plug while the oil continues to flow.