TM 55-4920-213-15
Possible remedy
Probable cause
42. Pneumatic WilI Not Start
Equipment load improperly
Possible remedy
Probable cause
distributed. - - - - - - - - - - - Readjust load.
No air pressure---compres-
sor stopped. -- - - - - - - - - Start compressor.
Operating speed of
equipment too high - - - -
Reduce speed in accordance
Air pressure cut off at
with TM for equipment
pressure regulator.- - - - - Adjust pressure regulator
to obtain pressure of 75
psi.
Equipment load too heavy._Reduce load to recommend-
ed limits in accordance
Air hose of equipment
with TM for equipment
not properly connected to
a d a p t e r . - - - - - - Remove air hose from sup-
ply at quick disconnect;
Cause beyond maintenance
clean adapter and re-in-
scope of operator. - - - - - - - Notify second maintenance
stall hose.
echelon.
Cause beyond maintenance
scope of operator. - - - - Notify second maintenance
echelon.
Possible remedy
Probable cause
Equipment receiving im-
43. Air Compressor Does Not Operate
proper lubrication. - - - - - - - - - Lubricate in accordance
Possible remedy
Probable cause
with paragraph 29 and
30.
Consult TM for compressor
Equipment being used im-
TM.
properly - - - - - - - - - - - - - - - Consult TM for equipment
ance with recommenda-
44. Excessive Vibration of Equipment
tions in TM.
Possible remedy
Probable cause
Cause beyond maintenance
scope of operatar. - - - - - - Notify second maintenance
Loose mounting bolts. - - - - Tighten or replace bolts
as necessary.
echelon.
Section V. ELECTRICAL SYSTEM
b. Servicing. Keep electrical power cords
46. General
clean and free of grease and oil. Do not allow
The electrical system of Shop Set Aircraft
rubber covered power cords to come in contact
Maintenance, Semitrailer Mounted C-4, Sheet
with grease, oil, fuels, cleaning solvents or
Metal, is a 110-220 volt, single phase and 208-
paint thinners. Store detachable electric power
volt, 3-phase system. Electrical power is sup-
cords in space provided when not in use. Wipe
plied to the shop from an external source to an
foreign materials from electrical receptacles be-
electrical distribution panel mounted in the
fore use or when exposed to wind, dust, rain,
right rear interior corner of the shop (fig. 4).
snow, or salt water.
A safety disconnect switch is mounted below
the electrical panel in order that the power
c. Adjustments. Check all male electrical con-
source may be disconnected from the interior
nectors for security and condition before use.
of the shop. The electrical panel contains 14
Adjust or tighten terminals as necessory. Fe-
thermal-magnetic circuit breakers for supply-
male electrical connectors and receptacles re-
ing power to the various circuits. The wiring
quire few adjustments beyond the tightening of
diagram for shop set C-4, is contained in fig-
screws. Check all female electrical connectors
ure 8.
and receptacles for security and condition be-
fore use.
a. General. Operator maintenance of the
Warning: Disconnect the power source at
electrical wiring installation consists of service
the safety disconnect switch prior to adjusting
and adjustments.
female electrical connectors or receptacles.
