Operating instructions

TM 55-4920-394-13&P
f. Pack bearings with grease.
g. Reinstall bearings and hub, and adjust castellated nut just until all end play is removed. Then back
off nut until cotter pin hole is exposed and install cotter pin.
h. If rear wheel hub has been removed, examine brake shoes for worn linings. If necessary, replace
brake shoes.
SECTION IV. TROUBLE SHOOTING
3-31. Trouble Shooting. The following table provides a quick check list of possible troubles which may be
encountered in the operation of the test stand, their probable cause and suggested remedy.
Table 3-6. Trouble Shooting
TROUBLE PROBABLE CAUSE REMEDY
Main Pump Power cable not connected or Plug in properly.
Motor will plug not seated in receptacle
not start
Circuit Breakers Tripped to OFF/ Reset Switches on ON.
Control Master Switch OFF (Refer
to fig. 3-16)
Incorrect Power Line phasing, Check and correct power
causing reverse phase relay to line phasing.
remain inoperative
Wrong Voltage applied, starter Connect to specified
will not respond power source; reset
starter button.
Defective Control Circuit Wiring Inspect Wiring, repair
(fig. 1-6) or replace defective
wire leads.
High Pressure Pump inlet below Press and hold pump on
40 psig button until pressure
builds up to 40 psig.
Main Pump Overloaded; starters tripped OFF Wait for 30 seconds,
Motor stops press starter button.
during If motor continues to
operation cut out, check for
cause of overload con-
dition; check heater
coils in starter.
Low Boost pressure to high Check cause of pressure
pressure pump failure to high pres-
sure pump. Filter ele-
ment clogs, fluid level
indication low.
3-14