Lull 944E-42 Service Manual - Manual (Page 158)

Axles, Drive Shafts, Wheels, Tires and Brakes
5.12 Model 644E-42/944E-42 Rev. 6/04
5.3.7 Axle Service and Troubleshooting
This section provides an easy reference guide covering
the most common problems that may occur during
operation of the axles.
Note: Contact your local Lull distributor or the JLG
Service Department at (877) 554-5438 or
(717) 485-6657, if internal axle repair is required during
the warranty period.
Detailed axle service instructions (covering axle, brakes
and wheel end safety, repair, disassembly, reassembly
and adjustment information) are provided in the ZF Axle
Repair Manual, Model MS-T 3045, JLG P/N 8990419 (ZF
P/N 5871 550 002).
The axle should be checked, serviced and repaired only
by experienced service technicians who are aware of all
safety instructions and particular component features.
5.3.8 Axle Assembly and Drive Shaft Troubleshooting
Problem Cause Remedy
1. Excessive axle noise while
driving.
1. Oil level too low.
2. Axle and/or wheel end housings
filled with incorrect oil, or oil
level low.
3. Incorrect alignment of ring and
pinion gears.
4. Incorrect pinion (input) shaft
bearing preload.
5. Worn or damaged bearings.
6. Worn or broken gear teeth.
7. Contamination in the axle.
8. Axle housing damaged.
1. Fill oil to correct level. (Refer to
the appropriate Owners/
Operators Manual.)
2. Drain axle and/or wheel end
housings and fill to correct level
with Universal Tractor Fluid.
(Refer to the appropriate
Owners/Operators Manual.)
3. Correct alignment by adding or
removing shims as needed.
4. Correct bearing preload by
adding or removing shims as
needed.
5. Replace bearings as needed.
6. Replace gears as needed.
7. Drain axle and/or wheel end
housings and fill to correct level
with Universal Tractor Fluid.
(Refer to the appropriate
Owners/Operators Manual.)
8. Replace damaged parts.
2. Intermittent noise when
travelling.
1. Universal joint(s) worn or
damaged.
2. Differential ring and/or pinion
gears damaged.
1. Repair or replace universal
joints as needed.
2. Determine cause and repair as
needed.
3. Vibration or intermittent noise
when travelling.
1. Drive shaft universal joint
assembly(ies) incorrectly
tightened.
2. Drive shaft universal joint(s)
worn or damaged.
3. Drive shaft(s) damaged/
unbalanced.
1. Tighten capscrews to correct
torque.
2. Repair or replace universal
joints as needed.
3. Replace drive shaft(s) as
needed.