Y-4
Y-4
Air Bleeding Procedure
26
WY05-4550E
5. Slewing control valve
(back-pressure valve)
[NOTICE]
Conditions
Engine speed : Max. (2150 min
-1
)
PTO
: ON
Slewing brake : ON
1. Open the air-bleed plug and rapidly move the
slewing lever repeatedly between left slewing and
right slewing.
2. When there are no more bubbles in the oil that
flows out, tighten the plug while the oil continues
to flow.
6. Pilot circuit
(hydraulic pilot control valve)
[NOTICE]
Conditions
Engine speed : idling (670 min
-1
)
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 Elevating
Pull out the connector (CN100) of the AML vent
solenoid valve.
Move the boom 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 boom elevating lever to
the boom raising side.
3 Telescoping
Pull out the connector (CN100) of the AML vent
solenoid valve.
Move the boom 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 boom telescoping lever
to the boom extension side.
4 Winch (main and auxiliary)
Pull out the connector (CN100) of the AML vent
solenoid valve.
Move the winch lever fully to the hoist-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 hoist-down side.
Summary of Contents for GR-500EXL-3
Page 1: ......
Page 8: ...7 WA04 4610E 6 Group index System Diagrams Data Adjustment and Checks Y Z Y Z...
Page 102: ...Z 7 Z 7 Hydraulic Parts Location Diagram Lower 31 WZ07 3950E 2 Steering 2 346 418 02000...
Page 108: ...37 WZ08 0590E Z 9 Z 9 Pneumatic Parts Location Diagram 3 Control parts lower 4 349 232 60000...
