Tadano GR-700N, Service Manual

Page: 44 / 200

Y-4 Y-4
Air Bleeding Procedure
31
WY05-3900E
7. Pilot circuit
(hydraulic pilot control valve)
[NOTICE]

Conditions
Engine speed : idling
PTO : ON
Oil temperature : 50°C (122°F) or higher
1 Slewing
With the slewing brake being actuated, move the
slewing lever fully to the right slewing side. Keep
the above conditions for 30 seconds or more for
bleeding. Proceed on the same steps by moving
the slewing lever to the left slewing side.
2 Jib
(Jib tilt)
Mount the jib, then set the boom/jib operation
selector switch to the "Jib tilt" side.
Pull out the connector (CN100) of the AML vent
solenoid valve.
Move the telescoping lever fully to the jib tilt
lowering side. Keep the above conditions for 30
seconds or more for bleeding. Proceed on the
same steps by moving the telescoping lever to the
jib tilt raising side.
(Jib telescoping)
Mount the jib, then set the boom/jib operation
selector switch to the "Jib telescoping" side.
Pull out the connector (CN100) of the AML vent
solenoid valve.
Move the telescoping lever fully to the jib
retracting side. Keep the above conditions for 30
seconds or more for bleeding. Proceed on the
same steps by moving the telescoping lever to the
jib extending side.
3 Elevating
Pull out the connector (CN100) sof the AML vent
solenoid valve.
Move the elevating lever fully to the boom
lowering side. Keep the above conditions for 30
seconds or more for bleeding. Proceed on the
same steps by moving the elevating lever to the
boom raising side.
4 Telescoping
Set the boom/jib operation selector switch to the
"Boom telescoping" side.
Pull out the connector (CN100) of the AML vent
solenoid valve.
Move the telescoping lever fully to the retraction
side. Keep the above conditions for 30 seconds or
more for bleeding. Proceed on the same steps by
moving the telescoping lever to the boom
extension side.
5 Winch (main and auxiliary)
Pull out the connector (CN100) of the AML vent
solenoid valve.
Move the winch lever fully to the hoisting up side.
Keep the above conditions for 30 seconds or
more for bleeding. Proceed on the same steps by
moving the winch lever to the hoisting down side.
Detail A
Solenoid valve (for AML vent) (CN100)