NMC-WOLLARD 140 - Rear Brakes; Rear Drum Brake Removal

Installation
1. Connect brake line to housing assembly.
2. Install caliper in reverse order of disassembly.
3. Bleed brake system as described in Chapter 2.
1.5 REAR BRAKES
The rear brake is a two-shoe type hydraulic brake mounted on a backing plate that serves
as a dust shield. The brake assembly can be removed as a complete assembly or partially
disassembled while mounted on the axle housing.
Item numbers refer to parts illustration in Chapter 4.
1.5.1 Rear Drum Brake Removal
See parts illustration in Chapter 4.
1. Raise tractor high enough off floor to provide adequate working space underneath
the frame. Support tractor with jack stands. Be sure that positioning of jack stands
does not interfere with work task.
2. Remove lug nuts and remove rear wheel assembly.
3. Remove fill/drain plug (AXLE-Rear, Wheel End, item 3) and drain lubricant from
wheel end.
4. Remove the 16 capscrews (item 1) from planetary spider assembly cover (item 4).
5. Using puller holes, remove planetary spider assembly cover (item 4).
6. Remove axle shaft and sun gear together (item 11, 12, & 13).
7. Remove planetary ring gear (item 14).
8. Remove hub bearing lock nut (item 16).
9. Remove hub and drum assembly (item 19 and 24). If necessary, manually retract
the brake shoes by loosening the star wheel adjuster.
IMPORTANT! When removing hub and drum assembly, always replace hub oil seal.
10. Remove automatic adjusting link wires and pivot (see parts illustration in Chapter
4).
11. Remove two upper shoe springs (item 9 and 20).
12. Remove the leading shoe hold-down clip (item 10). Lift and rotate the clip until
released from hold-down pin (item 4).
AUGUST 31, 2008 CHAPTER 3 OVERHAUL
PAGE 6 1 GENERAL REPAIR
M140 Tow Tractor Manual No. 46054