Axle Service And Troubleshooting - JLG Lull 1044C-54 II Series Service Manual

Axles and Brakes

Axle Service and Troubleshooting

9-6
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.
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.
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. Install the wheel and tire assemblies.
11. Carefully remove the jack, hoist or overhead crane and sling
supporting the axle.
12. Carefully raise the machine using a suitable jack or hoist. Remove the
supports from beneath the frame and lower the machine to the ground.
13. 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.
14. Install new o-rings into the fittings. Lubricate the o-rings with clean
hydraulic oil.
15. Uncap and connect the steering and brake lines at their axle fittings.
16. Check the hydraulic reservoir oil level.
17. 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.
This section provides an easy reference guide covering the most common
problems that may occur during operation of the axles.
Note: Contact the JLG distributor or the JLG Service Department at
1-877-554-5438 ext.6657, if internal axle repair is required during the
warranty period.
31200079