TM 55-4920-212-15
should be systematically isolated in accordance with
166. Pneumatic Equipment Stops During Operation
Probable cause
Possible remedy
162. Electrical Equipment Operates at Slow or
Obstruction in air lines. ........................... Remove obstruction.
Reduced Speed
Broken air lines. ...................................... Replace line.
Probable cause
Possible remedy
167. Pneumatic Equipment Will Not Start
Internal break in conductor inside
Probable cause
Possible remedy
conduit. .............................................. Remove wire from conduit;
splice or replace.
Improper grounding. ............................... Inspect for corrosion at ground
correctly. ............................................. Refer to air compressor
connections-repair or
technical manual for
replace as necessary.
procedure.
Contact points of circuit breaker
Check valves inoperative......................... Repair or replace check valves.
dirty or corroded. ................................ Clean points, reinstall circuit
Controls stuck. ........................................ Repair or replace controls.
breaker.
Improper connections in control panel.... Check control panel; position
168. Water System Equipment Operates at Slow or
Reduced Speed
163. Electrical Equipment Stops During Operation
Probable cause
Possible remedy
Probable cause
Possible remedy
Water line or hose clogged. .................... Clean water line or hose.
Broken power cord. ................................ Remove power; inspect, repair,
Leaking water line or hose....................... Repair leak.
or replace.
Pump not functioning correctly................ Repair pump in accordance
Circuit breaker burned out. ..................... Replace circuit breaker.
with technical manual for the
Short circuit in system. ........................... Check system with volt ohm
item.
meter-repair short circuit.
Valves partially closed. ............................ Position valves correctly.
164. Electrical Equipment Will Not Start
169.
Water System Equipment Stops During
Operation
Probable cause
Possible remedy
Probable cause
Possible remedy
External power receptacle inoperative. ...
Replace receptacle.
Power cord broken. ................................
Repair or replace power cord.
Pump or external water source off........... Repair equipment as
Circuit breakers burned out. ...................
Replace circuit breakers.
necessary.
Safety disconnect switch contacts
Broken water line or hose........................ Replace damaged line or hose.
corroded. ............................................
Clean contacts.
170. Water System Equipment Will Not Start
165. Pneumatic Equipment Operates at Slow or
Probable cause
Possible remedy
Reduced Speed
Pump not receiving electrical current. ..... Check electrical system; repair
or replace inoperative
Probable cause
Possible remedy
components.
Inlet valves closed. .................................. Check system (fig. 20);
Partial stoppage in air lines or hose........ Remove obstruction from air
reposition valves.
...........................................................
lines or hose.
Damaged air line..................................... Replace air line.
Controls stuck. ....................................... Repair or replace controls.
82