Lull 944E-42 Service Manual - Manual (Page 79)

5-7 944E-42
Axles, Drive Shafts, Wheels and Tires
5.3.7 Axle Assembly and Drive Shaft Troubleshooting
Problem Cause Remedy
1. Excessive axle noise while
driving.
1. Oil level too low. 1. Fill oil to correct level. Refer to
Section 2.4, “Fluid and
Lubricant Capacities.”
2. Axle and/or wheel end housings
filled with incorrect oil or oil level
low.
2. Drain axle and/or wheel end
housings and fill to correct level
with Mobilfluid 424
®
(ISO 46). Refer to Section 2.4,
“Fluid and Lubricant Capacities.”
3. Incorrect alignment of ring and
pinion gears.
3. Correct alignment by adding or
removing shims as needed.
4. Incorrect pinion (input) shaft
bearing preload.
4. Correct bearing preload by
adding or removing shims as
needed.
5. Worn or damaged bearings. 5. Replace bearings as needed.
6. Worn or broken gear teeth. 6. Replace gears as needed.
7. Contamination in the axle. 7. Drain axle and/or wheel end
housings and fill to correct level
with Mobilfluid 424
® (ISO 46).
Refer to Section 2.4, “Fluid and
Lubricant Capacities.”
8. Axle housing damaged. 8. Replace damaged parts.
2. Intermittent noise when
traveling.
1. Universal joint(s) worn or
damaged.
1. Repair or replace universal
joints as needed.
2. Differential ring and/or pinion
gears damaged.
2. Determine cause and repair as
needed.
3. Vibration or intermittent noise
when traveling.
1. Drive shaft universal joint
assembly(ies) incorrectly
tightened.
1. Tighten capscrews to correct
torque.
2. Drive shaft universal joint(s)
worn or damaged.
2. Repair or replace universal
joints as needed.
3. Drive shaft(s) damaged/
unbalanced.
3. Replace drive shaft(s) as
needed.