Section III. REPAIR OF DRIVE AXLE

1 Bleeder screw

2 Nipple

3 Booster assembly

4 Spring

5 Packing

6 Spacer

7 Cup washer

8 Sleeve

9 Poppet

10 Piston

11 Cup washer

12 Spring

13 Elbow

Figure 5-17. Power booster components.

Section III. REPAIR OF DRIVE AXLE

(2) Refer to paragraph 5-13 for service brake

5-18. Drive Axle Assembly

removal.

a. Description. The drive axle group consists of the

(3) Refer to paragraph 5-12 for hand brake

differential and carrier, axle shafts, and planetary gear-

removal.

type final drive. The drive wheel, bevel drive pinion, and

b. Disassembly.

differential assembly are supported by tapered roller

(1) Rotate hubs until plug (18, fig. 5-18) in

bearings. The differential carrier is mounted at the

cover (15) is at low point. Then remove plug and drain

center of the drive axle housing. The differential consists

oil from cover.

of two parts, the carrier assembly and case assembly.

(2) Remove nuts (17) and lockwashers (16)

The bevel ring gear is bolted to the differential case

and pull cover (15), gear (11), and gaskets (10) from

which houses the spider and side gears. The pinion

studs in hub (25).

gear is mounted in the differential carrier. Double

(3) Remove screws (14) and remove retainer

reduction is obtained by means of internal tooth

(12) from spider (1).

planetary gears mounted on the wheel hubs which are

(4) Slide gears (9) and thrust washers (8)

driven through idler gears by pinion gears mounted at the

from shafts (7).

wheel ends of the axle shafts.

(5) Insert threaded puller into tapped hole in

b. Removal. The complete drive unit, including wheels

axle shaft (6) and carefully pull axle shaft from axle

and tires, can be removed as a unit (para 2-15).

housing tube (33).

5-19. Planetary Gears, Axle Shafts, Wheel Hubs, and

(6) Remove nuts (4), lock (5), and washer (3)

Brakedrums

from axle housing tube.

a. Tire and Wheel Removal.

(1) Refer to TM 10-3930-618-20 for removal

of drive tires and wheels.

5-22