JLG 340AJ, Service And Maintenance Manual

Page: 97 / 370

SECTION 3 - CHASSIS & TURNTABLE
3121259 – JLG Lift – 3-55
15. Remove the bolts securing the bearing to the frame. It
may be necessary to disconnect more hoses on the flow
divider valve. If so, tag and disconnect all hoses and cap
or plug all openings to prevent dirt from entering the
hydraulic system.
NOTE: The swing bearing assembly weighs approximately 125
lbs. (56.6 kg).
16. Remove the bearing assembly from the frame.
Installation
NOTE: The swing bearing assembly weighs approximately 125
lbs. (56.6 kg).
1. Using an adequate lifting device, place the bearing
assembly onto the frame.
2. Install the bearing in the position shown in Figure 3-36.,
Bearing Placement. Coat the bearing bolts with JLG
Threadlocker P/N 0100019 and secure the bearing
assembly to the frame with the bolts. Following the
torque sequence diagram in Figure 3-37., Swing Bearing
Torque Sequence, tighten the bolts to an initial torque
of 95 ft.lbs. (130 Nm). Next, following the same
sequence, tighten to a final torque of 133 ft.lbs. (180
Nm).
3. If any hydraulic hoses were disconnected to remove the
swing bearing assembly, reconnect them as tagged dur-
ing removal.
NOTE: The turntable assembly weighs approximately 7000 lbs.
(3175 kg).
4. Using an adequate lifting device, lift the turntable
assembly from the blocking it is resting on and lower it
down onto the swing bearing assembly. Refer to the
removal instructions for chain placement.
5. Install several bearing bolts snuggly to secure the turn-
table’s position on the swing bearing assembly, but do
not torque them at this time and keep the lifting device
in place to support the weight of the turntable.
6. Coat the bearing bolts with JLG Threadlocker P/N
0100019 and install the remaining bolts securing the
turntable to the swing bearing. Tighten the bolts snugly
but do not torque them at this time. Remove the bolts
installed to secure the turntable’s position and apply
threadlocker to them. Reinstall them in the same man-
ner as the other bolts.
7. Following the torque sequence diagram in Figure 3-37.,
Swing Bearing Torque Sequence, tighten the bolts to an
initial torque of 95 ft.lbs. (130 Nm). Next, following the
same sequence, tighten to a final torque of 133 ft.lbs.
(180 Nm).
8. Install the drive orientation and lockout switches.
9. Route the hydraulic hoses down through the turntable
and reconnect them as they were tagged during
removal.
10. Secure the charge filter bracket.
11. Install the access covers on the side of the frame.
12. If removed, install the LP tank retaining brackets and LP
fuel tank.
13. Remove the lifting device from the machine.
14. Remove any straps that had been on the boom to pre-
vent movement of the boom sections.
15. Remove the eyebolts from the counterweight.
16. Connect the negative terminal on the battery.
17. Install the battery cover.
18. Push the engine tray back into place and secure it.
19. Start the machine and run it through several operating
cycles. Swing the machine in both directions.
20. Check for any leaks and that all functions are operating
properly. Top off the hydraulic oil level if necessary.