TM 55-4920-227-15
CHAPTER 4
DG, GS, AND DEPOT MAINTENANCE INSTRUCTIONS
Section I. SPECIAL DS AND GS MAINTENANCE TOOLS AND EQUIPMENT
There are no special tools and equipment required to perform direct support or general support maintenance on the
test stand.
Section II. TROUBLESHOOTING
44. General
47. Gears Noisy
Probable use
Possible remedy
This section provides information useful in diagnosis
Gear teeth chipped or----------Replace gears (para. 58).
and correction, inspection, operation, or failure of the
worn.
test stand. Each trouble symptom stated is followed by
Roller bearings defective -----Replace bearings
a list of probable causes of the trouble. The possible
remedy recommended is described opposite the
probable cause.
48. Varibelt Wear Abnormal or Uneven
Probable use
Possible remedy
45. Tachometer Fluctuates
Varidiscs scored or--------------Replace varidiscs
Probable use
Possible remedy
grooved.
Varibelt worn ----------------------Replace the varibelt
Stationary varidiscs not -------Aline varidiscs (para. 54).
alined.
Discs worn--------------------------Replace discs(paras. 56
and 58).
49. Electric Remote Control Fails To Operate
Disc set improperly -------------Reset disc properly
Probable use
Possible remedy
Remote control power ---------Repair or replace wiring.
Replace
tachometer
supply faulty.
defective.
generator (para. 51).
Raise or lower control----------Replace raise, lower
buttons defective.
buttons (para. 61).
46. Starter Trips
Remote control micro- ---------Replace microswitches
Probable use
Possible remedy
switches defective.
Starter electrical connec------Clean and tighten electrical
Remote control motor ----------Replace remote control
tions loose or corroded.
connections.
defective.
Starter coil defective------------Replace coil (para. 65).
Starter contactors --------------Replace stationary and
defective.
movable contactors
Section III. BLOWER MOTOR AND MOTOR SUPPORT
(2) Tag and disconnect the blower motor electrical
50. Bower Motor and Motor Support
a. Removal
leads.
(1) Remove the blower housing (para. 43)
(3) Remove four screws (6, fig. 14), flat washer
(8), nuts and lockwashers.
AGO 6729A
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