Section 4: Prepare Parts For Assembly; Clean, Dry And Inspect Parts; Worn Or Damaged Parts; Ground Or Polished Parts - Meritor PreSet Maintenance Manual

Hazard Alert Messages
4 Prepare Parts for Assembly
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.
Observe all warnings and cautions provided by the press
manufacturer to avoid damage to components and serious
personal injury.
Use a brass or synthetic mallet for assembly and disassembly
procedures. Do not hit steel parts with a steel hammer. Pieces
of a part can break off. Serious personal injury and damage to
components can result.
Replace damaged or out-of-specification axle components. Do
not bend, repair or recondition axle components by welding or
heat-treating. A bent axle beam reduces axle strength, affects
vehicle operation and voids Meritor's warranty. Serious
personal injury and damage to components can result.
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.
CAUTION
Do not use hot solution tanks or water and alkaline solutions to
clean ground or polished parts. Damage to parts can result.
4 Prepare Parts for Assembly

Clean, Dry and Inspect Parts

Worn or Damaged Parts

Do not repair or recondition wheel-end components. Replace
damaged, worn or out-of-specification components. Do not mill or
machine any components.
Inspect the drum pilots, wheel pilots and the mounting face on the
hub for damage. A damaged drum pilot is usually caused by
incorrect drum mounting. A damaged wheel pilot could be the result
of incorrect wheel nut torque, which allows the wheels to slip in
service. Also, inspect the wheels and brake drum for damage.

Ground or Polished Parts

1. Use a cleaning solvent to clean the ground or polished parts
and surfaces. Kerosene or diesel fuel can be used for this
purpose. DO NOT USE GASOLINE.
2. Do NOT clean ground or polished parts in a hot solution tank or
with water, steam or alkaline solutions. These solutions will
cause corrosion of the parts.
3. Thoroughly clean the hub cavity with spray degreaser. The
cavity must be free of any contaminants.
4. To remove grease from a wheel end, use a stiff fiber brush, not
steel, and kerosene or diesel fuel, not gasoline. Allow the parts
to dry. Note that any solvent residue must be completely wiped
dry since it may either dilute the grease or oil or prevent the
lubricant from correctly adhering to the wheel-end
components.
5. Clean and inspect the wheel bearings, race, spindle bearing
journals and hub. Bearings should be cleaned in a suitable
non-flammable solvent and dried with either compressed air or
a lint-free rag.
If compressed air is used, do not spin dry the bearings as the
rollers may score due to lack of lubricant. Ensure that the air
line is moisture free.

Rough Parts

Rough parts, those without smooth or machined surfaces, can be
cleaned with the ground or polished parts. Rough parts also can be
cleaned in hot solution tanks with a weak alkaline solution. Parts
must remain in the hot solution tanks until they are completely
cleaned and heated.
Meritor Maintenance Manual MM-0637 (Revised 07-12)
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