Tadano GR-500EXL-3, Руководство по обслуживанию

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Y-4 Y-4
Air Bleeding Procedure
24
WY05-4550E
2. Winch brake
[NOTICE]

When hoisting down or hoisting up the winch, pay
attention to the hook block position.

Conditions
Engine speed : Idling (670 min
-1
)
PTO : ON
Bleed the main and auxiliary winch brakes according
to the procedure below.
1. Operate the lever by inching operation within the
range that the drum can rotate.
Pay attention to prevent the operating pressure
from exceeding the value described below.
• 2.5 MPa {25.5 kgf/cm
2
} (360 psi)
(during hoisting up)
• 4.5 MPa {46.0 kgf/cm
2
} (650 psi)
(during hoisting down)
2. 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]

If a winch brake is bled while the winch drum rotates
fast, the winch brake may be damaged. When
bleeding 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.
3. 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.
Booster
[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.