Air Bleeding Procedure

2. Bleeding procedure

2.1 Service brake

[NOTICE]

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

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

1. With the sufficient compressed air in the air reservoir, depress the brake pedal and loosen the air-bleed plug on the booster to bleed the circuit

2. Then tighten the air-bleed plug 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-bleed plug while letting the fluid flow out.

2.2. Winch brake

[NOTICE]

When winding or unwinding the winch, pay attention to the hook position.

Conditions

Engine speed : Idling PTO : ON

Bleed the main and aux. winch brakes following the procedure below.

Operate the lever by inching operation within the range that the drum can rotate. Pay attention to prevent the working pressure from exceeding the value described below.

2.5 MPa {25.5 kgf/cm²} (360 psi) (during hoisting up)

4.5 MPa {46 kgf/cm²} (650 psi) (during hoisting down)

While operating the lever, loosen the air-bleed plug. When the flowing oil contains no more bubbles, tighten the plug while the oil is flowing out.

[NOTICE]

The vehicle has two air-bleed plugs for the front axle and two for the rear axle.

4. Bleed the wheel cylinders in the calipers of the axles in the steps same as above.

[NOTICE]

If a winch brake is bled while the winch drum rotates fast, the winch brake may be damaged. When bleeding a winch brake, reduce the winch speed as far as the drum can rotate. Once you start bleeding a winch brake, you need not move the winch lever to and fro. Keep the lever to the position so that the drum rotates at the lowest speed as possible.