Jib Cylinder Holding Valve - JLG TOUCAN 10E Service And Maintenance Manual

SECTION 7 - HYDRAULICS

Jib Cylinder Holding Valve

Figure 7-14. Jib Cylinder Holding Valve - Removal/Instal-
Valve Removal
ENSURE THAT THE JIB IS FULLY LOWERED (OR SAFELY SUP-
PORTED) BEFORE DISMOUNTING THE VALVE. DISCONNECT
BATTERY PLUG TILL THE REPAIRS ARE COMPLETED.
1. Ensure the jib is lowered (or safely supported - Refer
to Section 5). Turn power off at ground controls. Dis-
connect battery plug.
2. Tag and disconnect electric lines from the solenoid
valve coils.
3. Disconnect and cap the cylinder hydraulic line and
port (1).
4. Remove the coil from the Jib Up solenoid valve (2).
5. Unscrew the hardware (3) securing the valve protec-
tor (4) and remove the protector.
6. Unscrew the valve banjo bolt (5) and plug the cylin-
der port (3/8" BSPP).
Valve Installation
1. Remove the coil from the Jib Up solenoid valve (2).
2. Check presence and condition of the two BS rings.
Install the valve onto the cylinder. Keep the block in
line with the cylinder and torque the banjo bolt (5) 38
to 42 Nm (28 to 31 ft lbs).
DO NOT OVER-TORQUE THE VALVE BANJO BOLT.
3. Slide the valve protector onto the Jib Up solenoid
valve (2) and secure with hardware (3).
4. Install the coil onto the solenoid valve. Install the O-
ring and tighten the coil nut 4 to 5 Nm (2.8 to 3.7 ft
lbs).
5. Remove port plug and hydraulic line cap. Correctly
connect line to valve port.
7-8
lation
6. Connect electric lines to solenoid valve coils as pre-
viously tagged.
7. Connect battery plug.
8. From platform console, perform at least 5 (five) Jib
Up/Down movement (full stroke) to bleed the air
from the circuit and to check for proper operation.
9. Raise the jib to horizontal position and stop. Perform
a Jib Lowering movement. If there is a jerk upwards
before the jib begins to go down, the circuit is not
correctly bled. Perform additional Jib Up/Down
movements (full stroke).
10. Check hydraulic fluid level and adjust accordingly.
Figure 7-15. Jib Cylinder Holding Valve - Schematic/
1. Ported Body
2. Banjo Bolt w/ Built-in Flow Regulator
3. BS Ring
4. Jib Down Solenoid Valve
5. Coil - 24 VDC
6. O-Ring
7. Coil Nut
8. Manual Override Boot
9. Jib Up Solenoid Valve
10. Coil Nut
11. Check Valve
12. Plug - 1/4" BSPP
13. Elbow Adapter
– JLG Lift –
Exploded View
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