Spicer Tandem Drive Axles Service Manual D170, D190, and D590 Series - Manual (Page 10)

6
Inspection
Inspection
Clean
1. Wash steel parts with ground or polished surfaces
in solvent. There are many suitable commercial
solvents available. Kerosene and diesel fuel are
acceptable.
Gasoline is not an acceptable solvent because of its
extreme combustibility. It is unsafe in the workshop envi-
ronment.
2. Wash castings or other rough parts in solvent or
clean in hot solution tanks using mild alkali solu-
tions.
Note: If a hot solution tank is used, make sure parts are
heated thoroughly before rinsing.
3. Rinse thoroughly to remove all traces of the cleaning
solution.
4. Dry parts immediately with clean rags.
5. Oil parts.
• If parts are to be reused immediately: Lightly oil.
• If parts are to be stored: Coat with oil, wrap in
corrosion resistant paper and store in a clean,
dry place.
Inspect Axle Housing
Axle housing inspection and repairs are limited to the
following checks or repairs.
• Visually inspect axle housing for cracks, nicks, and
burrs on machined surfaces.
• Check carrier bolt holes and studs for foreign
material.
• Replace damaged fasteners. Look for loose studs or
cross threaded holes.
Any damage which affects the alignment or structural integ-
rity of the housing requires housing replacement. Do not
repair by bending or straightening. This process can affect
the material's properties and cause it to fail completely
under load.
• Check all seals and gaskets.
Note: Replace conventional gaskets with silicone rubber
gasket compound (included in many repair kits). The
compound provides a more effective seal against lube
seepage and is easier to remove from mating surfaces
when replacing parts.
Inspect Components
Inspect all steel parts for:
• Notches, visible steps or grooves created by wear
• Pitting or cracking along gear contact lines
• Scuffing, deformation, or discolorations. These are
signs of excessive heat in the axle and are usually
related to low lubrication levels or improper lubrica-
tion practices.
In addition, inspect the following for damage:
• Differential gearing.
• Bearings for loose fit on drive pinion, pilot bearing,
and differential bearings.
• All fasteners for rounded heads, bends, cracks, or
damaged threads.
• Inspect machined surfaces of cast or malleable
parts. They must be free of nicks, burrs, cracks,
scoring, and wear.
• Look for elongation of drilled holes, wear on sur-
faces machined for bearing fits and nicks or burrs in
mating surfaces.
Inspect Primary Gearing
Before reusing a primary gearset, inspect teeth for signs of
excessive wear. Check tooth contact pattern for evidence of
incorrect adjustment.
WARNING
CAUTION
1
2
1 - Axle housing
2 - Machined surface