TM 9-4940-421-14
LOCATION
NOT FULLY MISSION
ITEM TO
PROCEDURE
INTERVAL
CAPABLE IF:
CHECK/SERVICE
Any of the outlets are
CIRCUIT BREAKERS AND RE-
During oper-
dead, or if circuit break-
CEPTACLES. Check that electrical
ation, but not
ers cut off for no reason,
current is delivered to the four recep-
less frequent-
or if circuit breakers are
tacles on the control panel (p. 22),
ly than
difficult to turn on and
the receptacle next to the air compres-
monthly
off.
sor starter box (p. 23), and the exter-
nal power receptacle (p. 2-4). Check
that circuit brokers operate easily
and do not cutoff for no reason.
Notify organizational maintenance if
circuit breakers and/or receptacles are
not working properly.
SERVICE LIGHT. Turn on, then turn
off service light. Notify organization-
al maintenance if service light is not
working.
Welder will not perform
Welder
Perform straight stick welding
During oper-
its function at all switch
(p. 2-4) or otherwise apply a load at
ation, but not
settings.
all settings of DC ampere selector
less frequent-
switch and DC ampere adjusting
ly than
rheostat. Notify organizational main-
monthly
tenance if welder is not functioning at
all settings.
Air compessor will not
During oper- Pressure Gage
Turn on air compressor (p. 2-4) and
come on and buildup
ation, but not Reading
observe reading on pressure gage
normal pressure of 80-
(p. 2-3) while checking that the com-
less frequent-
100 psi (551.60
ly than week-
pressed air system delivers a steady
689.50 kpa), or if com-
flow of air. If correct pressure range
ly
pressed air delivery can-
cannot be reached, adjust the pressure
not be maintained at this
switch (p. 23) as follows:
pressure, or if presure
switch cannot be prop-
a. Low cutin pressure: 75 85
erly adjusted, or if pres-
psi (517.13 586.08 kpa).
sure gage is inoperative.
b. High cut-out pressure: 95
105 psi (655.03 689.50 kpa).
If switch cannot be set to correct pres-
sure, notify organizational mainte-
nance.
Change 1
3-2.7
