Cylinder Repair - JLG TOUCAN 8E Service And Maintenance Manual

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.
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) and repeat this step until all
air is bled from the circuit.
10. Check hydraulic fluid level and adjust accordingly.
Figure 7-17. Jib Cylinder Holding Valve - Schematic/
Exploded View
31210090
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

7.6 CYLINDER REPAIR

NOTE: The following are general procedures that apply to
all the cylinders of the machine. Procedures that
apply to a specific cylinder will be so noted.
NOTE: After cylinder removal, it is recommended to replace
bushings (if fitted). Refer to Section 1 for bushings
installation procedure.
Figure 7-18. Steer Cylinder
1. Barrel
2. Rod
3. Gland
4. Piston (a-b)
5. O-Ring
6. Piston Angled guide
7. Split Back-up Ring
8. O-Ring
9. Locknut
10. O-Ring + Back-up Ring
11. O-Ring
12. Rod Seal
13. Wiper Seal
14. Flange Bushing
– JLG Lift –
SECTION 7 - HYDRAULICS
7-9