TM 55-4920-212-15
Probable cause
Possible remedy
111. Water System Equipment Will Not Start
Faulty check valve .................................. Check air pressure at re-
gulators; replace check
Probable cause
Possible remedy
valves as necessary.
Power source
Break in air hose
disconnected . .................................... Check electrical connection
of equipment ..................................... Check air hose and replace
of pump, shut off valve
as necessary.
on intake; adjust as ne-
Cause beyond repair
cessary.
scope of operator. .............................. Notify supporting field
Valves positioned
maintenance unit.
wrong. ................................................ Check position of valves;
reposition as necessary.
109. Water System Operates at Slow or Reduced
Broken line or hose ................................ Repair or replace lines or
Speed
hose
Cause beyond mainte-
Probable cause
Possible remedy
nance scope of
Low source pressure .............................. .Check gages; adjust con-
operator . ............................................ Notify supporting field
trols to obtain correct
maintenance unit.
pressure.
Low source pressure
112. Excessive Vibration of Equipment
(auxiliary)............................................ Check incoming pressure
gage; notify responsible
Probable cause
Possible remedy
personnel.
Loose mounting bolts . ........................... Check mountings for securi-
Leak in water lines,
ty; tighten or replace
hose, or fittings .................................. Check pressure; repair
bolts as necessary.
leaks; tighten connec-
Equipment improperly
tions
loaded................................................. Reduce loads, readjust load
Cause beyond maintenance
or reduce speed as neces
scope of operator. .............................. Notify supporting field
sary.
maintenance unit
Cause beyond repair
scope of operator. .............................. Notify supporting field
110.
Water
System
Equipment
Stops
During
maintenance unit.
Operation
113. Excessive Noise
Probable cause
Possible remedy
Probable cause
Possible remedy
Failure of source
Lack of lubrication .................................. Lubricate equipment in ac-
power (pump) . ................................... Position valves; place pump
switch in OFF position;
use auxiliary water
Improper use of
source.
equipment .......................................... Check specific manuals for
Failure of source
use of equipment.
power (auxiliary) . ............................... Position valves; place pump
Cause beyond repair
switch in ON position;
scope of operator. .............................. Notify supporting field
use water tank.
maintenance.
Inoperative valve(s)-Replace valve(s).
Cause beyond maintenance
cope of operator. ................................ Notify supporting field
maintenance unit.
Section V. RADIO INTERFERENCE SUPPRESSION
ment without, radios be suppressed properly to prevent
114. Purpose
equipment, or disclosing locations.
or minimizing of the electrical disturbances which interfere
b. Suppression in the equipment is accomplished by
with radio reception or disclose the location of the
the use of resistor suppressors and
equipment to sensitive electrical detectors. Therefore, it
is very important that equipment with, as well as equip
49