Oil Seals And O-Rings; Inspect Parts - Meritor MM-0170 Maintenance Manual

Oil Seals and O-rings

Discard all oil seals and o-rings. Replace with new parts.

Inspect Parts

It is very important to inspect all parts carefully and completely
before the axle or carrier is assembled. Check all parts for wear
and stress. Replace all damaged parts to avoid costly downtime
at a future date. For more detailed information about inspections
and analysis, refer to Technical Publication TP-0445, Parts Failure
Analysis.
Tapered Roller Bearings
Inspect the tapered roller bearings. Inspect the cup, cone, rollers,
and cage of all tapered roller bearings in the assembly. If any of the
following conditions exist, the bearing must be replaced:
• The center of the large diameter end of the rollers is worn level
with or below the outer surface. Figure 6.1.
• The radius at the large diameter end of the rollers is worn to a
sharp edge.
WORN RADIUS
WORN SURFACE
Figure 6.1
• A visible roller groove is worn in the inner race surfaces of
the cup or cone. The groove can be seen at the small or large
diameter end of both parts.
• Deep cracks or breaks appear in the surfaces of the cup, cone,
inner race, or rollers. Figure 6.2.
(16579)
Printed in USA
Figure 6.2
• Bright wear marks appear on the outer surface of the roller cage.
Figure 6.3
• The rollers and surfaces of the cup and cone inner race touching
1003017b
Figure 6.4
• The cup and cone inner race surfaces touching the roller are
Copyright Meritor, Inc., 2023
6 Prepare Parts for Assembly
CRACK
Figure 6.3.
WEAR MARKS
the rollers are damaged. Figure 6.4.
ETCHING AND PITTING
damaged. Figure 6.5.
WEAR
GROOVES
1003018b
1003019a
1003020a
MM-0170 / Revised 03-23
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