Axle Internal Component Troubleshooting - JLG sky trak mmv Service Manual

Axles, Wheels and Tires
5.2.10 Axle Internal Component
Troubleshooting
Note: The following conditions may be noticed when
inspecting parts during axle repair. Perform all remedies
that apply to the conditions noticed.
Problem
1. Differential ring gear teeth
broken on the heel of the
tooth.
2. Differential ring gear teeth
broken on the toe of the
tooth.
3. Rapid differential ring and
pinion gear teeth wear.
4. Differential ring and pinion
gear teeth overheated.
5. Gear teeth pitted.
6. Worn or pitted bearings.
5.16
Cause
1. Incorrect alignment of ring and
pinion gears (excessive play).
2. Incorrect pinion (input) shaft
bearing preload.
1. Incorrect alignment of ring and
pinion gears (insufficient play).
2. Incorrect pinion (input) shaft
bearing preload.
1. Insufficient lubrication.
2. Lubricant contaminated.
3. Incorrect lubricant.
1. Insufficient lubrication.
2. Lubricant contaminated.
3. Incorrect lubricant or level.
1. Insufficient lubrication.
2. Lubricant contaminated.
3. Foreign objects in oil.
1. Incorrect bearing preload.
2. Insufficient lubrication.
3. Lubricant contaminated.
Remedy (See Note)
• Replace ring and pinion gears.
• Adjust ring and pinion alignment
and bearing preload as described
in the ZF Repair Manuals.
• Replace ring and pinions gears.
• Adjust ring and pinion alignment
and bearing preload as described
in the ZF Repair Manuals.
• Replace ring and pinion gears.
• Drain axle and fill to correct level with
Universal Tractor Fluid (refer to Sec-
tion 2.13.11, b. Axle Oil Change ).
• Determine the cause of the prob-
lem and correct.
• Replace ring and pinions gears.
• Drain axle and fill to correct level
with Universal Tractor Fluid (refer
to Section 2.13.11, b. Axle Oil
Change and/or Section 2.13.13, b.
Wheel End Oil Change ).
• Determine the cause of the prob-
lem and correct.
• Replace gears.
• Drain axle and fill to correct level
with Universal Tractor Fluid (refer
to Section 2.13.11, b. Axle Oil
Change and/or Section 2.13.13, b.
Wheel End Oil Change ).
• Determine the cause of the prob-
lem and correct.
• Replace bearings.
• Adjust bearing preload as described
in the ZF Repair Manuals.
• Drain axle and fill to correct level
with Universal Tractor Fluid (refer
to Section 2.13.11, b. Axle Oil
Change and/or Section 2.13.13, b.
Wheel End Oil Change ).
Model MMV Rev. 12/04