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Section 4
Cleaning and Inspection
Inspect Parts
It is very important to inspect all parts carefully and
completely before the transfer case is assembled.
Check all parts for wear and stress. Replace all
damaged parts. Replacement of the damaged parts
before assembly can prevent complete failure of the
assembly later.
1. 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:
A. The center of the large diameter end of the
rollers is worn level with or below the outer
surface.
B. The radius at the large diameters end of the
rollers is worn to a sharp edge. Figure 16.
E. Bright wear marks appear on the outer surface
of the roller cage. Figure 18.
F. The rollers and surfaces of the cup and cone
inner race that touch the rollers are damaged.
Figure 19.
Figure 16
Figure 17
Figure 18
Figure 19
C. 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.
D. Deep cracks or breaks appear in the surfaces of
the cup, cone inner race or rollers. Figure 17.
WORN RADIUS
WORN SURFACE
CRACK
WEAR GROOVES
WEAR MARKS
ETCHING & PITTING
Pro Gear and Transmission • 906 W. Gore St. Orlando, FL 32805 • 1 (877) 776-4600 / (407) 872-1901 • [email protected]