TM 5-4310-344-34
2-27.
CLEANING AND INSPECTION.
While maintaining this internal pressure, brush a soap-
water solution on joints of assembly.
Maximum
allowable leakage, as evidenced by air bubbles, is one
a. Wash all parts except the element in dry
bubble per minute.
cleaning solvent, Federal Specification P-D-680. Dry
parts thoroughly with low pressure compressed air.
c. If leakage rate exceeds one air bubble per
minute, disassemble moisture separator and install new
b. Inspect parts for scoring, pitting, wear, and
packing on cap.
other evidence of damage.
2-30.
COMPRESSOR COMPONENTS.
c. Ensure
that
all
drilled
passages
are
unobstructed.
a. High pressure compressed air is routed
2-28.
REASSEMBLY.
from the third stage cylinder through the aftercooler
assembly. Cooling fins on the tubing dissipate heat
from the compressed air. The assembly is attached to
a. Position gasket (7) and element (6) against
the fan guard in a position to receive maximum air flow.
inner surface of cap (1) and secure with washer (5) and
screw (4).
b. The fan is attached to the crankshaft to
provide cooling air for the cylinders and the intercooler
b. Lubricate
preformed packing (3) with
and aftercooler assemblies.
pneumatic system grease, MIL-G-4343, and install in
groove in the cap. Screw the cap into the shell until the
c. The two intercooler assemblies connect the
seam is closed.
first stage cylinder to the second stage cylinder, and the
second stage cylinder to the third stage cylinder.
c. Install rupture discs (9) into the cap ports
and screw retainers (8) to a torque of 350 pounds-inch.
2-31.
AFTERCOOLER ASSEMBLY.
d. Test the moisture separator as described in
2-32.
REMOVAL. (See figure 2-10.)
e. If removed, press a new thermostat switch
a. Disconnect the aftercooler (7) from the
(11) into shell (2).
third stage cylinder and the separator and filter air line.
f.
If heater blanket (10) was removed wrap
b. Remove six screws (5) and lockwashers (6)
the blanket around the shell, with the electric leads
and pull the fan guard (4) away from the air compressor
positioned with the thermostat switch leads, and secure
endbell.
with electrical acetate tape.
c. Remove two screws (8) and lockwashers
2-29. TESTING. Test the moisture separator for
(9) attaching each of six clamps (10).
leakage before attaching the heater blanket or
thermostat switch, or installing the pneumatic dump
d. Pull the aftercooler assembly (7) away
valve.
from the guard (4).
Note
2-33.
CLEANING AND INSPECTION.
If thermostat switch was not removed
a. Clean the exterior surfaces of the
during disassembly, it must be protected
aftercooler assembly with dry cleaning solvent, Federal
against moisture by covering with
Specification P-D-680. Use compressed air to clean
waterproof tape.
residue from the fins.
a. Install pressure plugs in all ports except
b. Inspect for damaged threads, cracks, and
one. Connect variable source of compressed air to
missing fins.
remaining port.
c.
Straighten bent fins.
b.
Pressurize moisture separator to 3200 psig.
d.
Replace a damaged aftercooler assembly.
2-8
