JLG G12-55A Service Manual - Manual (Page 81)

5-5 G10-55A, G12-55A
Axles, Drive Shafts, Wheels and Tires
3. Using a suitable jack, hoist or overhead crane and
sling, remove the axle from its support or holding
stand. Balance the axle and prevent it from tipping,
turning or falling while positioning it beneath the
machine. DO NOT raise or otherwise disturb the
machine while installing the axle. Keep the axle
supported and balanced on the jack, hoist or
overhead crane and sling throughout the installation
procedure.
4. Position the axle under the frame, and align the axle
housings with the holes in the frame.
5. Install the four axle bolts and nuts. Tighten and
torque to 530-565 lb-ft (718-766 Nm).
6. Move the cylinder into position on the axle cylinder
anchor. Insert a cylinder-mount pin through the
cylinder and cylinder anchor. Secure the cylinder-
mount pin with one capscrew and a new locknut.
7. Apply multi-purpose grease through the self-tapping
lube fitting to lubricate the self-align bearing and the
cylinder-mount pin.
8. Install the drive shaft assemblies. (Refer to Section
5.4.5, “Drive Shaft Installation.”)
9. If reinstalling an axle previously removed from the
machine, position the driveshaft yoke on the axle
according to the alignment marks made earlier. If
installing a new axle, note the position of the
driveshaft yoke at the transmission. Align the
driveshaft yoke on the axle in the same plane as the
yoke on the transmission.
10. Tighten the axle oil drain plug, loosen and remove
the axle oil fill plug (1). (Refer to Section 2.4, “Fluid
and Lubricant Capacities,” for proper oil and
capacities.
11. Rotate wheel hubs 90 degrees so the drain plug (2)
becomes the fill plug (3). Refer to Section 2.4, “Fluid
and Lubricant Capacities,” for proper oil and
capacities.
12. Install the wheel and tire assemblies. Refer to
Section 5.5.2, “Installing Wheel and Tire Assembly
onto Machine.”
13. Carefully remove the jack, hoist or overhead crane
and sling supporting the axle.
14. Carefully raise the machine using a suitable jack or
hoist. Remove the supports from beneath the frame
and lower the machine to the ground.
15. Remove the blocks from the front and rear of both
tires on the other axle.
Note: ALWAYS use new o-rings when servicing the
machine.
16. Install new o-rings into the fittings. Lubricate the
o-rings with clean hydraulic oil.
17. Uncap and connect the steering and brake lines at
their axle fittings.
18. Check the hydraulic reservoir oil level.
19. Start the engine. Turn the steering wheel several
times lock to lock, operate the frame tilt function
several times in both directions and check the
function of the brakes. Check for hydraulic leaks,
and tighten or repair as necessary.
20. Install the optional fender assembly.
21. Close and secure the engine cover.
22. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
Note: The service brake and parking brake circuits will
need to bled after axle installation. Refer to Section
8.7.4, “Service Brake Bleeding.”
MY4180
2 1 1 2
MY0220
3
LEVEL