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Page Title: Section XIV. REPAIR OF ACCELERATOR CONTROLLER
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TM 10-3930-609-35
Connect motor electrically as shown in figure 3-19.
u. Using a high potential test set, apply 500 volts
Check motor at no load and at stalled rotor load for
ac rms between terminal A2 and motor frame for one
characteristics shown in the following chart.
minute.  There must be no evidence of insulation
breakdown.
3-98. Installation of Pump Motor
v. Clamp motor securely to top of bench and
Refer to paragraph 2-22 for installation procedure.
connect a torque arm (capable of applying no load to
stall load) to armature shaft and to a spring balance.
Voltage
Loading
Applied torque
Motor speed
Current
(steady)
36 volts dc Equivalent to raising 2,000 pound load
14 foot pounds
3,265 rpm 5%
200 amps 5%
on forks
36 volts dc Stalled rotor
42 foot pounds minimum
0
525 amps 5%
Section XIV. REPAIR OF ACCELERATOR CONTROLLER
3-99. Description of Accelerator Controller
e. Remove screws and lockwashers which secure
The accelerator controller comprises a metal switch
controller to mounting bracket and separate controller
enclosure mounted on a welded steel bracket.  The
from bracket.
bracket provides the mounting for the controller below
f. Remove screws and lockwashers which secure
the accelerator pedal.  A shaft extending from the
cover to controller box assembly; then, remove cover to
enclosure is mechanically connected to the accelerator
expose parts inside box assembly.
pedal through a lever and control rod. A return spring-
g. Remove screws which mount support to box
(attached to the lever) returns the controller mechanism
assembly; then, lift out support with potentiometer and
to the off position when the operator removes force from
terminal block.
the accelerator pedal. Inside the enclosure, two cams
h. Disconnect potentiometer leads from terminal
attached to the shaft operate sensitive switches as the
board;  then,  remove  clamp  and  pinion  from
shaft is rotated through the accelerator pedal linkage. A
potentiometer shaft.
Remove nut from hub of
sector gear mounted on the shaft rotates the shaft of a
potentiometer  and  withdraw  potentiometer  from
potentiometer mounted in the enclosure. A mechanical
potentiometer bracket.
stop secured to the shaft limits shaft rotation in both
i. Ordinarily, removal of terminal boards, terminal
directions.
board bracket and potentiometer bracket will not be
required.
3-100. Removal of Accelerator Controller
j. Remove screws which secure switch supports to
Removal of the accelerator controller from the truck is
box assembly; then, remove screws which secure,
required for repair as described in the following
switches to switch supports and withdraw switches.
instructions. Refer to TM 10-3930-609-12 for removal
procedure.
k. Loosen setscrew in stop, in gear sector hub and
in collar and remove screws and lockwashers from
3-101. Disassembly of Accelerator Controller (fig. 3-
cams; then, withdraw shaft from box assembly and
remove two keys.
a. Loosen nut on rod and unscrew rod from ball
I. Remove collar, hub, gear sector, cams and stop
joint.
from box assembly.
b. Remove screw and lockwasher which secure
ball joint to lever and remove ball joint.
3-102. Cleaning Disassembled Parts of Accelerator
Controller
c. Disconnect' spring from capscrew inside of lever
and remove capscrew and nut from lever.
a. Wash metallic non-electrical parts, if required, in
SD and dry with compressed air under moderate
d. Remove capscrew, nut and lockwasher which
pressure.
secure lever to shaft of controller and disengage lever
from shaft.
b. Clean electrical parts by wiping with a soft cloth.
3-35

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