Section XVI. MAINTENANCE OF REAR DRIVE AXLE AND SPRINGS

TM 10-3930-633-12

(2) Position the parking brake drum (22) and

(2) Apply the parking brake; remove the

transmission output shaft flange attaching nut,

output shaft flange assembly to the transmission

then release the parking brake.

output shaft, and install the attaching nut (21).

(3) Remove the cotter pin (1) and clevis pin

(3) position the parking brake band

assembly (23) over the drum, and install the

(3), and disconnect the adjusting rod (12) from

bracket attaching screws.

the cam.

(4) Install the brake band adjusting bolt (12)

(4) Remove the cotter pin and clevis pin (2),

and nuts (8) and springs (13).

and remove the cam link (6) from the cam (5).

(5) Connect the cam link (6) to the lower end

(5) Remove the lockwire and the anchor

of the cam with clevis pin (3) and cotter pin (1).

adjusting screw (24).

(6) Remove the brake band adjusting bolts

(6) Connect the adjusting rod (12) to the

upper end of the cam with clevis pin (2) and cotter

(14) and nuts (15).

pin (1).

(7) Remove the brake bracket retaining

(7) Adjust the parking brake, and install a

capscrews (17).

lockwire in the anchor adjusting screw (24).

(8) Lift the brake band (23) and lining

assembly off the drum.

(8) Apply the parking brake, torque the

transmission output shaft flange nut to

(9) Inspect the brake lining, and replace it if

the distance between the brake lining surfaces

specifications, then release the parking brake.

(9) With the transmission in low gear,

and the top of the rivet is less than 1/32 inch.

connect the drive shaft at the flange and torque

c. Installation.

the four attaching nuts.

(1) Check the drum before reinstalling

parking brake. If drum is rough, scored, or

cracked, it must be replaced.

Section XVI. MAINTENANCE OF REAR DRIVE AXLE AND SPRINGS

outlined below. Refer to figure 4-57 and proceed

4-82. General

as follows:

The rear axle is a single reduction, spiral bevel

a. Drain differential by removing the lower

drive, with a reduction gearcase at the input shaft

capscrew on the front cover of the differential

to provide a double reduction final drive ratio.

bowl. Drain differential at operating tem-

The axle shafts are the semi-floating type. The

peratures. Removal of the filler/plug will allow

axle is suspended beneath the frame by means of

full atmospheric pressure to enter the differential

semi-elliptical leaf springs.

bowl and speed up the draining process.

4-83. Inspection

NOTE

At 500 hour intervals, inspect rear drive axle and

Before removing plugs from either differential or

drop gearcase as follows:

drop gearcase, clean both assemblies so that the

area around the drain, fill/level plugs is absolutely

a. Check drop gearcase and differential

clean.

housing gaskets for signs of leakage.

b. Remove drain plug from the drop gearcase

b. Operate tractor and listen for unusual noises

and drain lubricant at operating temperature.

from axle assembly. Operate through sharp right

c. Replace drain plugs after both units are

and left hand turns as well as straight ahead,

completely drained and tighten plugs securely,

when making this check.

d. Remove fill/level plug and fill differential

c. Check springs and spring shackles for

with lubricant as recommended in LO 10-3930-

damage, loose hardware, lack of lubrication.

633-12. Do not fill above the level of the plug hole.

d. Check lubricant level in differential and drop

Replace plug and securely tighten.

gearcase and add oil as required (LO 10-3930-633-

e. Remove fill/level plug of drop gearcase and

12).

add one quart of lubricant. Then replace fill/level

4-84. Lubrication

plug and securely tighten.

Use only lubricants specified in LO 10-3930-633-

12 when performing lubrication services as

4-73