TM 55-4920-217-15
Probable cause
Possible remedy
39. Electrical Equipment Will Not Start
Cause beyond maintenance
scope of operator ------- Notify
second
echelon
Probable cause
Possible remedy
maintenance.
Power cord of equipment
not plugged into
42. Pneumatic Equipment Will Not Start
receptacle --------------- Insert- plug of equipment
cord into receptacle.
Probable cause
Possible remedy
No power from auxiliary
power source ------------ Check for power source
No air pressure-compressor
operation; notify operator.
stopped-------------------- Start compressor
Circuit breakers in electri-
Air pressure cut off at
cal panel on "OFF"
pressure regulator ------ Adjust pressure regulator to
position-------------------- Re-set circuit breakers to
obtain pressure of 76 psi.
"ON" position.
Air hose of equipment not
Safety disconnect switch
properly connected to
open ----------------------- Close
safety
disconnect
adapter -------------------- Remove air hose from supply
switch.
at quick disconnect; clean
Cause beyond maintenance
adapter and reinstall hose.
scope of operator------- Notify
second
echelon
Cause beyond maintenance
maintenance.
scope of operator ------- Notify
second
echelon
maintenance.
40.
Pneumatic Equipment Operates at Slow or
43. Excessive Vibration of Equipment
Reduced Speed
Probable cause
Possible remedy
Probable cause
Possible remedy
Loose mounting bolts ------- Tighten or replace bolts as
necessary.
Air compressor not oper-
Equipment load improperly -
ating ----------------------------- Start air compressor; allow
distributed ---------------- Readjust load.
source pressure to reach
Operating speed of equipment
operational level; re-start
too high-------------------- Reduce speed in accordance
equipment.
with technical manual for
Air pressure not properly
equipment.
regulated at water sep-
arator --------------------------- Adjust pressure regulator to
Equipment load too heavy.. Reduce
load
to
proper level (75 psi).
recommended
limits
in
Loose connection at air
accordance with technical
hose quick disconnect
manual for equipment.
adapter. Water in air ..........Re-seat adapter.
Cause beyond maintenance
Cause Beyond maintenance
scope of operator ------- Notify
second
echelon
scope of operator ------------ Drain water separator.
maintenance.
............................................Notify
second
echelon
maintenance.
44. Excessive Noise
Probable cause
Possible remedy
41. Pneumatic Equipment Stops During Operation
Equipment receiving im-
Probable cause
Possible remedy
proper lubrication ------- Lubricate in accordance with
Air compressor stopped ---- Check
compressor
Equipment being used im-
operation;
start
properly ------------------- Consult technical manual for
compressor.
equipment;
use
in
Equipment overloaded------ Reduce feed, pressure, or
accordance
with
Connect air line.
recommendations
in
Air line disconnected -------- speed as necessary.
technical manual.
Probable cause
Possible remedy
Section V. ELECTRICAL SYSTEM
Shop, is a 110-220-440-volt, single and three phase, AC
45. General
system. Electrical power is supplied to the shop from an
The electrical system of Shop Set, Aircraft
external source
Maintenance, Semitrailer Mounted, C-8, Instrument
16
