TM 55-4920-221-14
b. Cleaning and Inspection.
(2) Position pressure gage on front of control
panel securing gage to rear of panel with three screws.
(1) Clean meters with a cloth dampened in
(3) Insert one end of pressure gage tube (1)
dry cleaning solvent P-D-680 and dry thoroughly.
through opening in left side of control panel. Place
(2) Visually inspect meters for cracked or
opposite end of tubing on female coupling attached to
broken lens, bent pointer, damaged dial, cracked or
pressure gage. Assemble on tubing with compression
damaged meter case, and stripped or loose terminals.
nut.
(3) Inspect hardware for worn or damaged
93.
INLET
AND
OUTLET
ELECTRICAL
threads.
RECEPTACLES
c. Installation.
a. Removal.
(1) Position
and
secure
single-phase
(1) Tag and disconnect electrical leads from
ammeter (7) on front of control panel, with four nuts.
terminals on inlet receptacle (33, figure 7).
(2) Connect electrical leads to terminals on
(2) Remove inlet receptacle (33) from control
single-phase ammeter as tagged in (3) above.
panel by removing two nuts (35), lockwasher, and
(3) Install other meters in a similar manner.
screws (34).
d. Meter Calibration.
(3) Remove outlet receptacle (32) in a similar
(1) Check meters and zero adjust as
manner.
required.
b. Cleaning, Inspection, and Repair.
(2) Isolate meters to be calibrated from test
(1) Clean parts with a cloth dampened in dry
stand circuit by removing links associated with each
cleaning solvent P-D-680 and dry thoroughly.
meter.
(2) Visually inspect receptacles for cracks,
(3) Attach shop standard instruments and
breaks, stripped threads, and loose or corroded
calibrate.
terminals.
(4) Upon completion of test, install meter
(3) Inspect hardware for worn or stripped
links.
threads and other damage.
92. PRESSURE GAGE.
(4) Repair damaged threads on receptacles.
a. Removal.
c. Installation.
(1) Loosen compression nut on pressure
(1) Install inlet receptacle (33) on left side of
gage tube (1, figure 7) from female coupling (2).
control panel and secure with two screws (34),
Remove tubing from coupling and control panel.
lockwashers, and nuts (3:5).
(2) Remove three screws (3) that secure
(2) Connect tagged electrical leads to
pressure gage (16) to control panel and remove gage
terminals of inlet receptacle.
from front of panel.
(3) Install outlet receptacle (32) in a similar
(3) Remove female coupling (2) from
manner.
pressure gage.
94. FAN INDICATOR LAMP, OVERHEAT INDICATOR
b. Cleaning and Inspection.
LAMP, AND UNEXCITED BUS TEST LAMP
(1) Clean pressure gage with cloth dampened
ASSEMBLIES.
in dry cleaning solvent P-D-680 and dry thoroughly.
a. Removal.
(2) Visually inspect gage for cracked or
(1) Tag and unsolder electrical leads from
broken lens, damaged dial and pointer, stripped threads,
terminals on cooling fan indicator (4, figure 8).
and a cracked or broken case.
(2) Remove cooling fan indicator from front
(3) Inspect tubing for cracks or kinks, and
of control panel by removing the special nut and
adapter for stripped or damaged threads.
lockwasher from the terminal end of indicator.
c. Installation.
(3) Remove lens and 'incandescent lamp
(1) Thread female coupling (2) into opening
from indicator.
on rear of pressure gage (16).
(4) Remove unexcited bus indicator (5) in a
similar manner.
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