HAND AND SEAT BRAKE.

brake shoes and springs. Secure rod in place with self-

(1) With axle level fore and aft, measure

locking nut (9).

distance between inside tires at hub height, first at front,

(4) Secure link (3) between clevis on lower

then at rear. If measurements are within 1/16-inch of

brake shoe with anchor pin (4). Insert cotter pin (7)

each other, no adjustment is needed. Tighten tie rod

through end of anchor pin to secure anchor pin.

end clamps (24) on tie rods. If readings are outside

limits, proceed to step below.

(5) Insert link pin through clevis (38. figure 7-

28) on rod (36) and through link: then. insert cotter pin

(2) Turn each tie rod (17 and 20) an equal

(42) through link pin to secure pin.

amount (with clamps (24) still not tightened) until wheels

are parallel, as measured in step (1) above.

6-132.

SERVICE BRAKES.

(3)

Tighten tie rod end clamps.

6-133.DISASSEMBLY (figure 7-35).

6-127.

HAND AND SEAT BRAKE.

(1) Remove front wheels from drive axle

(para 6-76).

6-128. The hand-motor brake system incorporates a

hand brake lever and a mechanical seat linkage to apply

(2)

Remove wheel hubs.

brake shoes to the brake drum attached to the travel

motor armature shaft. This braking system is applied

(3) Disconnect both brake tubing (15) from

automatically when the operator leaves the seat or may

adapters (19) on each wheel cylinder (41). Use care to

be applied by the operator by means of the brake lever.

prevent kinking or denting tubing and to avoid entrance

of foreign matter.

6-129. REMOVAL. Remove motor brake shoes and

drum as follows:

(4) Remove screw (49) and washers (50)

(1) Remove clevis rod (38, figure 7-28) at link

securing brake assemblies and spacer (42).

(3, figure 7-36) secured with pins (41 and 42, figure 7-

28).

(5) Use brake servicing tool's to remove

retaining spring (28) and return spring(27), then. lift off

(2) Remove nut (9, figure 7-36) and two

brake shoes.

springs (10) mounted on rod (8).

(6) Remove bolts (35) and washers (36)

(3) Remove brakeshoes (] 7) attached to

which secure wheel cylinders to backing plate; then,

motor with nut (56), washer (57) and stud(58). Remove

withdraw wheel cylinders.

NOTE

bushings (16) from brakeshoes.

If wheel cylinders show evidence of fluid

(4) Remove brake drum (18) attached with

leakage, repair cylinder or replace.

woodruff key, nut (20) and cotter pin (21) from motor

shaft.

6-134. CLEANING. Remove dust from parts with

compressed air and a stiff bristle brush. If brake fluid

6-130. REPAIR AND REPLACEMENT OF MOTOR

has leaked onto brake shoe linings, replace linings and

BRAKE PARTS. Repair of motor brake parts is limited

clean other parts with alcohol. If grease from axle has

to removal and replacement of bushings In brake shoes.

contaminated parts, wash parts (except wheel cylinders)

Press bushings out of shoes and install new bushings.

in SD, and replace linings on brake shoes.

CAUTION

Replace brake shoes. If brake linings are worn to less

than 1/I6inch at any point, replace brake shoes.

Do not allow SD to come in contact with rubber

Replace brake drum if scored, corroded or pitted.

parts. SD will cause rubber to swell and rot.

Replace any other parts that are distorted or excessively

worn.

6-135.

INSPECTION.

(1) Inspect wheel cylinders for evidence of

6-131. INSTALLATION OF MOTOR BRAKE SHOES

fluid leakage.

AND DRUM.

(1) Place motor brake drum (18, figure 7-36)

(2) Inspect

linings

brake

shoes

for

with woodruff key on motor shaft and secure with nut

excessive wear.

(20) and cotter pin (21).

(3) Inspect backing plates for distortion or

(2) Place brake shoes on mounting stud (58)

other damage.

and secure with washer (57) and nut (56).

(4) Inspect tapped holes and threaded parts

(3) Place compression springs (10) between

for stripping of threads or other thread damage.

ends of brake shoes; then, insert rod cup (8) through

6-35