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5 Prepare Parts for Assembly
17
ArvinMeritor Maintenance Manual MM-0361 (Revised 04-10)
5 Prepare Parts for Assembly
Hazard Alert Messages
Read and observe all Warning and Caution hazard alert messages in
this publication. They provide information that can help prevent
serious personal injury, damage to components, or both.
WARNING
To prevent serious eye injury, always wear safe eye protection
when you perform vehicle maintenance or service.
Solvent cleaners can be flammable, poisonous and cause
burns. Examples of solvent cleaners are carbon tetrachloride,
and emulsion-type and petroleum-base cleaners. Read the
manufacturer’s instructions before using a solvent cleaner,
then carefully follow the instructions. Also follow the
procedures below.
Wear safe eye protection.
Wear clothing that protects your skin.
Work in a well-ventilated area.
Do not use gasoline or solvents that contain gasoline.
Gasoline can explode.
You must use hot solution tanks or alkaline solutions
correctly. Read the manufacturer’s instructions before
using hot solution tanks and alkaline solutions. Then
carefully follow the instructions.
Clean, Dry and Inspect Parts
Ground and Polished Parts
Use a cleaning solvent to clean ground or polished parts or surfaces.
Kerosene or diesel fuel oil can be used for this purpose. DO NOT
USE GASOLINE.
Do NOT clean ground or polished parts in a hot solution tank,
water, steam or alkaline solutions.
Use a knife, if required, to remove gasket material from parts. Be
careful not to damage the ground or polished surfaces.
Rough Parts
Rough parts can be cleaned with cleaning solvent or in a hot
solution tank with a weak alkaline solution.
Parts must remain in hot solution tanks until completely cleaned
and heated.
When removed from the hot solution, wash the parts with water
until the alkaline solution is removed.
Axle Assemblies
A completely assembled axle assembly can be steam cleaned on
the outside to remove heavy amounts of dirt.
Before the axle is steam cleaned, close or put a cover over all
openings in the axle assembly. Examples of openings are
breathers or vents in air chambers.
Dry Cleaned Parts
CAUTION
Do not dry bearings by spinning with compressed air. Damage
to components can result.
Parts must be dried immediately after cleaning and washing.
Dry the parts using soft clean paper or cloth rags.
Except for bearings, parts can be dried with compressed air. Do
not dry bearings by spinning with compressed air.
Prevent Corrosion on Cleaned Parts
Apply a light oil to cleaned and dried parts that are not damaged
and are to be immediately assembled. Do not apply oil to the
brake linings or the brake drums.
If parts are to be stored, apply a good corrosion preventative to
all surfaces. Do not apply the material to the brake linings or the
brake drums. Store the parts inside special paper or other
material that prevents corrosion.
Tapered Roller Bearings
Inspect the cup, cone, rollers and cage of all tapered roller bearings
in the assembly. If you find any of the following conditions, replace
the bearing. Figure 5.1.
The center of the large-diameter end of the rollers is worn level
or below the outer surface.
The radius at the large-diameter end of the rollers is worn to a
sharp edge.
You find a roller groove at the small- or large-diameter end of the
cup or cone inner race surfaces.
You can see deep cracks or breaks in the cup, cone, and inner
race or roller surfaces. Figure 5.2.
You can see bright wear marks on the outer surface of the roller
cage. Figure 5.3.
The rollers are damaged. Figure 5.4.
The cup and cone inner race surfaces that touch the rollers are
damaged. Figure 5.5.
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