Y-4
Y-4
Air Bleeding Procedure 2. Winch brake
3. Service brake
[NOTICE]
[NOTICE] The vehicle has two boosters; one for the front wheel brakes and the other for the rear wheel brakes.
Bleed the main and auxiliary winch circuits by following the procedures below. The procedures are common to the both circuits. 1. Engine speed: Idling (700 min )
Take care of spattering the brake fluid and the fluid level in the fluid reservoir while bleeding.
2. Lever operation: Operate the lever by inching
1. With the sufficient compressed air in the air
-1
operation within the range that the drum can fun.
reservoir, depress the brake pedal and loosen the
Operate the lever so that the working pressure
air-bleed plug on the booster to bleed the circuit.
does not exceed the value described below.
2. Then tighten the air-bleed plug before releasing
2
2.5 MPa (25.5 kgf/cm ) (360 psi)
the brake pedal.
(during hoisting up) 2
4.5 MPa (45.9 kgf/cm ) (650 psi)
3. Repeat the above steps until the flowing brake
(during hoisting down)
fluid contains no air bubbles. After the air bubbles go out, tighten the air-bleed plug while letting the
3. Bleeding will be completed when the oil flowing
fluid flow out.
out of the air-bleed plug hole contains no bubbles.
[NOTICE] The vehicle has each 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.
22
WY05-3162E
