TM 55-4920-212-15
42. Pneumatic Equipment Stops During Operation
45. Water System Equipment Stops During Operation
Probable cause
Possible remedy
Probable cause
Possible remedy
Air compressor stopped ......................... Start air compressor.
Water pump stopped.............................. Investigate cause of stop-
Equipment overloaded ............................ Reduce feed, pressure, or
page; repair and restart
speed as necessary.
pump.
Air line disconnected .............................. Connect air line.
Failure of auxiliary
Cause beyond main-
source ............................................... Check incoming source pres-
tenance scope of
sure; change source or
operator. ............................................. Notify second maintenance
use storage tank for
echelon.
source.
Valve(s) inadvertently
opened or closed................................ Reset valves in accordance
43. Pneumatic Equipment Will Not Start
Cause beyond main-
Probable cause
Possible remedy
tenance scope of
No air pressure-
operator. ............................................. Notify second echelon main-
compressor topped ........................... Start compressor.
tenance
Air pressure cut off
46. Water System Equipment Will Not Start
at pressure
regulator. ............................................ Adjust pressure regulator
Probable cause
Possible remedy
to obtain pressure of 756
Failure of water source ........................... Operate system from stor-
psi.
age tank
Air hose of equipment
Failure of water
not properly con-
pump. ................................................. Notify second echelon me-
nected to adapter................................ Remove air hose from sup-
chanic.
ply at quick disconnect;
Pump not receiving
clean adapter and rein-
electrical current ................................ Check incoming source of
stall hose.
electrical power; report
Cause beyond main-
discrepancies to respon-
tenance scope of
sible personnel.
operator. ............................................. Notify second maintenance
Cause beyond main-
echelon.
tenance scope of
operator. ............................................. Notify second echelon main-
44. Water System Fills at Slow or Reduced Speed
tenance.
Probable cause
Possible remedy
47. Excessive Vibration of Equipment
Valves set in
wrong position. ................................... Set valves in accordance
Probable cause
Possible remedy
Loose mounting bolts ............................ Tighten or replace bolts as
Source pressure low
necessary.
(auxiliary) ........................................... Check source pressure; ad-
Equipment load im-
just as necessary.
properly distributed............................. Readjust load.
Drain valve open ..................................... Close valve (s) (par, 15).
Operating speed of
Leak in water lines. ................................. Check lines (fig. 20); re-
equipment too high............................. Reduce speed in accordance
pair leaks.
with technical manual for
Water pump not
equipment.
operating correctly.............................. Notify second echelon me-
Equipment load too
chanic.
heavy. ................................................ Reduce load to recommend-
Cause beyond main-
ed limits in accordance
tenance scope of
with technical manual for
operator. ............................................. Notify second echelon main-
equipment.
tenance.
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