TM-9-2330-335-14-P

SEMITRAILER, TACTICAL, BREAKBULK/CONTAINER TRANSPORTER, 22-1/2 TON, RESET M871R, M871A1R AND M871A2R

TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE MANUAL (INCLUDES REPAIR PARTS AND SPECIAL TOOLS LIST)

SEPTEMBER 2008

TM-9-2330-335-14-P - Page 586 of 640

TM 9-2330-335-14&P

0103-2

0103

PROCEDURE - CONTINUED

2.

Check condition of fastening system.

a.

Verify end-play measurement before removing fastener.

b.

Examine outer nut and return spring.

Remove Outer Bearing

000103

1.

Remove wheel or hub assembly, using a wheel dolly.

2.

Check spindle.

a.

Threads damaged.

b.

Chamfer damaged

3.

Set bearings aside for inspection.

4.

Remove seal.

a.

Check hub.

b.

Condition of chamfer.

c.

Nicks, burrs, or damage.

5.

These are the key seal failure modes to look for. They will account for virtually all of your premature seal failures:

Figure 1.

Standard Terms.

0103

a.

Improper installation

b.

Wrong tool or no tool used.

c.

Cocked installation.

d.

Improper bearing adjustment.

e.

Seal spinning on spindle.

(1) Hit spindle.

(2) Spindle imperfections.

f.

Hub imperfections.

g.

Installed over a wear ring.

447-0144