TM 55-4920-215-15
Probable cause
Possible remedy
Probable cause
Possible remedy
Safety disconnect switch
Air pressure cut off at
open ........................... Close safety disconnect
pressure regulator ....... Adjust pressure regulator
switch.
to obtain pressure of 75
Cause beyond maintenance
psi.
scope of operator ........ Notify second echelon main-
Air hose of equipment not
tenance.
properly connected to
adapter ....................... Remove air hose from sup-
ply at quick disconnect;
40. Pneumatic Equipment Operates at Slow or
clean adapter and re-ins-
Reduced Speed
stall hose.
Probable cause
Possible remedy
Cause beyond maintenance
Power source not
scope of operator ........ Notify second echelon main-
operating. .................... Start power source; allow
tenance.
source pressure to reach
operational level; re-start
43. Excessive Vibration of Equipment
equipment.
Probable cause
Possible remedy
Air pressure not properly
Loose mounting bolts ..... Tighten or replace bolts as
regulated at water sepa-
necessary.
rator ............................ Adjust pressure regulator
Equipment load improperly
to proper level (75 psi).
distributed ................... Readjust load.
Loose connection at air hose
Operating speed of equip-
quick disconnect
ment too high .............. Reduce speed in accordance
adapter ....................... - Re-seat adapter.
with TM for equipment
Water in air .................... -Drain water separator.
Equipment load too
Cause beyond maintenance
heavy .......................... Reduce load to recommend-
scope of operator ........ Notify second echelon main-
ed limits in accordance
tenance.
with TM for equipment
41. Pneumatic Equipment Stops During Operation
Cause beyond maintenance
Probable cause
Possible remedy
scope of operator ........ Notify second echelon main-
Power source stopped .... Re-start power source.
tenance.
Equipment overloaded ... Reduce feed, pressure, or
speed as necessary.
44. Excessive Noise
Air line disconnected ...... Connect air line.
Probable cause
Possible remedy
Cause beyond maintenance
Equipment receiving im-
scope of operator ........ Notify second echelon main-
proper lubrication ........ Lubricate in accordance
tenance.
42. Pneumatic Equipment Will Not Start
Equipment being used im-
Probable cause
Possible remedy
properly ....................... Consult TM of equipment
No air .pressure-power
source stopped ............ Start power source.
dance with recommenda-
tions in TM.
Cause beyond maintenance
scope of operator ........ Notify second echelon main-
tenance.
Section V. ELECTRICAL SYSTEM
mounted in the right rear interior corner of the shop (fig.
45. General
4). A
safety disconnect switch is
mounted below the
The electrical system of Shop Set, Aircraft
electrical panel in order that the power source may be
Maintenance, Semitrailer Mounted, C-6, Machine Shop
disconnected from the- interior of the shop. The
is a 110-220 volt, single phase and 208 volt, 8 phase
electrical panel contains 14 thermal-magnetic circuit
system. Electrical power is supplied to the shop from a
breakers for supplying power to the various
generator or external source to an electrical distribution
panel
20