Tadano GR-300EX-3, Service Manual

Page: 42 / 157

Y-4. Y-4.
Air Bleeding Procedure
29
WY05-4181E
7. Positive control circuit
While any of the crane operations described in 6.
is performed, loosen the air-bleed plug near the
lower pump to bleed the positive control circuit.
You can bleed the circuit at the same time with
pilot circuit bleeding.
8. Hydraulic valve (winch brake)
[NOTICE]

Bleed this valve after the pilot circuit (hydraulic pilot
control valve) (See the section 6.) and the positive
control (See the section 7.) are bled.

Conditions
Engine speed : idling (700 min
-1
)
PTO : ON
1. Open the air-bleed plug and move the winch lever
fully to the end of its stroke in the direction
corresponding to the plug.
2. When there are no more bubbles in the oil that flows
out, tighten the plug while the oil continues to flow.
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