PAGE 4-2
CHAPTER 2 MAINTENANCE
NMC-WOLLARD
2021 Truax Blvd. Eau Claire, WI 54703 ● P: 715-835-3151● F: 715-835-6625 ● www.nmc-wollard.com
TML-704H Maintenance Lift Manual No. 310547
4.2 AXLE BEARINGS, BRAKE ASSEMBLIES, AND DIFFERENTIAL
To minimize risk of serious eye injury always wear industrial
safety glasses when working with snap rings and spring loaded retainers as they
can be ejected with great force. Use extreme caution and keep your body and face
out of the way.
Refer to Chapter 5 and the illustrated parts breakdowns in Chapter 4.
4.2.1 Repair of Caliper, Wheel Hub and Brake Disc
1. Remove caliper mounting bolts attaching caliper to knuckle. Place a block
between the friction pads to secure the pistons.
2. Remove grease cap from hub.
3.
Remove cotter pin, nut, and washer from wheel hub and pull off wheel hub
and brake disk. Protect bearings from contamination.
4. Remove brake disc from wheel hub, if necessary, by removing wheel studs
from hub. Take care to avoid damage to wheel stud threads. If damaged,
replace.(Brierton Only)
5. Inspect hub bearings. Remove bearing cups, if necessary. Always replace
cup and cone as a set.
6. If inner and outer bearings are to be replaced, install new cups into hub.
Make sure cups are seated well.
7. Install new brake disc, if necessary, with wheel studs.(Brierton Only)
8. Grease inner cone and cup and install inner cone.
9. Install grease seal using a plug to place pressure evenly around seal. If
you bend or otherwise damage seal, discard and use a new one.
NOTICE!
DO NOT OVERFILL
with grease because too much grease can
cause seal to fail or grease cap to pop loose after assembly.
NOTE
: If the tie rod ball joints were replaced or adjusted in any way, check
toe-in and adjust if necessary.
Use
MIL-G-10924D
grease on the front axle.
10. Pump grease into hub cavity.
11. Use grease to lubricate the seal lip.
12. Install hub. Rotate hub while installing to spindle so seal doesn’t roll under.
As spindle goes into inner cone, try to feel that all parts are straight and
properly seated on spindle bearing journal.
13. Grease outer cone and place over spindle and into cup.
14. Assemble washer and nut to spindle. Tighten nut to 10-15 ft-lbs torque.
Rotate hub while tightening nut.
15.
Back off nut until it just becomes loose.
16.
While rotating hub, retighten nut to finger tight. Line up cotter pin hole in
4 REPAIRS
SEPTEMBER 01, 2015
Property of American Airlines
