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Section IX. BRAKE SYSTEM
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TM-10-3930-609-12 Truck Fork Lift Electric Solid Rubber Tires 2 000 lbs Capacity 144 In. Lift Manual
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Figure 3-6. Handbrake lever, cable and control linkage.
TM 10-3930-609-12
orientation, and to facilitate removal and instal-
3-27. Handbrake Lever
lation that may be performed in conjunction
a. Removal.
with the organizational maintenance services.
(1) Fully release handbrake lever (fig. 3-
b. Seat Brake Adjustment.
6) and remove screws, nuts and washers securing
(1) Two adjustments are provided to main-
handbrake lever to forward angle.
tain the motor brake at required efficiency. The
(2) Remove screw,  nut and lockwasher
brake shoe adjusting nut (on brake actuating
securing handbrake lever to control cable and
clevis) provides the basic adjustment on which
pull handbrake lever out of truck.
the seat actuation adjustment depends.
b. Installation. Reverse procedure in a above,
(2) Remove truck cowl and valve cover
adjusting handbrake cable (para 3-28c) after in-
(para 3-21) and floor plate (para 3-18). With
stallation.
truck seat occupied and handbrake released,
check with leaf or round feeler gage for brake
3-28. Handbrake Cable and Control
shoe lining-to-drum clearance of 0.010 inch to
linkage
0.020 inch.
a. Removal.
(3) If required, tighten brake shoe adjust-
(1) Disengage handbrake lever from con-
ing nut to set clearance between these values.
trol cable (para 3-27a (2)).
Do not overtighten, so brake will not drag.
(4) With loaded truck held on 15o incline
(2) Unscrew nut securing control cable in
clevis and remove spring.
by foot brake application, raise from operator's
(3) Pull cable from clevis and remove out-
seat and release foot brake. If truck rolls, stop
with foot brake and continue to (5) below.
side clevis nut.
(5) Tighten spring adjusting nut not over
(4) Remove nut securing control cable out-
er covering to travel motor mounting bracket
two turns, and repeat (4) above to test results.
and pull control cable off truck.
Repeat until spring application of motor brake
holds loaded truck on 15o incline.
b. Installation. Reverse procedure in a above,
adjusting handbrake cable (para 3-28c) after in-
c. Brake Rod Adjustment.
(1) Adjust spring tension raising seat to
stallation.
c. Adjustment.
suit operator, by turning large nut above spring.
(2) Adjust position of motor switch sup-
(1) Check seat brake adjustment (para 3-
port strip with seat bottomed by operator's
(2) Fully release handbrake lever and fully
weight, so motor switch is definitely actuated.
depress operator's seat.
(3) Rack off outside clevis nut and press
3-30. Service Brake
control cable into clevis. Run outside clevis nut
a. Brake Adjustment. The service brakes are
up to clevis.
self-adjusting to take up play due to lining wear.
(4) Tighten inside clevis nut to prevent
Refer to paragraph 3-31b(4) for pedal adjust-
spring from free movement but not enough to
ment.
compress spring.
b. Bleeding Service Brake System. The hy-
(5) Sit in operator's seat and engage hand-
draulic brake system must at times be bled to
brake to be certain travel motor brake fully en-
expel air in the system. The need is generally
gages
indicated by springy or spongy brake pedal
(6) If brakes do not fully engage, repeat
action. Unless special brake bleeding equipment
steps (2) through (5) above pressing control
is available, two men are required to bleed the
cable further into clevis. Reverse this procedure
system, one to maintain a constant supply of
if brakes engage with no application of hand-
fluid in the master cylinder and to pump the
brake lever.
brake pedal, the other to perform the bleeding
operation.
3-29. Seat Brake and Control Linkage
(1) Remove floor plate (para 3-18). Re-
a. General. The parts shown in figure 3-7
move filler plug from master cylinder and fill
comprise the footbrake and seat brake linkage.
with hydraulic brake fluid.
With the exception of the brake master cylinder,
(2) Clean bleeder screws at each wheel cy-
these parts and linkages are not subject to re-
linder (fig. 3-8). Remove small screws from
pair other than replacement of individual dam-
bore of bleeder screws. Attach one end of bleed-
aged parts. The parts are illustrated for general
er hose to bleeder screw and place other end of
3-14

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