TM 5-4310-349-14
relatively free of maintenance. However, if the on-off
d.
Cleaning and Repair.
cycles are too frequent because of heavy use, and
(1) Clean belt guard with a rag dipped in
accumulations of dust and dirt cover the frame,
cleaning solvent Fed. Spec. P-D-680, then wipe dry.
intercooler, or aftercooler, the compressor will run hot.
(2) Smooth out any dents or bends. Replace
Excessive heat consumes compressor oil. Low oil
the damaged part that is beyond repair.
causes ring wear, or cylinder scoring.
Therefore,
e. Installation. Install the belt guard by reversing
frequent inspections are necessary.
the removal procedure in c. above.
b. Inspection.
(1) Visually inspect for excess accumulations
3-6.
Motor
of dust, dirt, or film of oil.
a. Cleaning.
(2) Test for heat by touching intercooler tube,
(1) Remove dust and dirt from motor with
aftercooler tube, or cylinder head.
compressed air. Use a cloth dampened in cleaning
(3) Check release valve for signs of leaking.
solvent, Fed Spec P-D-680 to wipe off the stator frame.
(4) Listen for excessive start-stop cycling.
(2) Use the same method of cleaning on end
(5) Listen carefully for a knock or rattle that
covers and the motor starter. Refer to figure 3-2 for
might signify internal damage.
locations.
(6) When any of these inspections disclose
b. Inspection.
abnormal conditions, refer to table 3-3.
(1) Inspect the shaft for movement (end
play),
3-9.
Air Intake Mufflers
(2) Notify organizational maintenance of a
a. General. The air intake mufflers are designed
defective motor.
to clean the air entering the first stage cylinders. Should
the operating area be exceptionally dusty, it must be
3-7.
V-BELTS (Set of 3 used on Model HR10-8M-1,
serviced more frequently. A clogged intake muffler
Set of 2 used on HR10-8M-4, and Set of 2 used on
reduces the efficiency of the compressor.
C&H.)
b. Cleaning and Inspection.
a. Inspection. Make a visual inspection of belts
(1) Wipe off the outside of the muffler body
condition to determine if the belts require removal for
then refer to figure 3-3 and disassemble the air intake
cleaning and deglazing.
If deglazing appears
muffler as shown.
necessary, report to organizational maintenance.
(2) Wash all parts of the muffler and wipe
b. Adjustment.
dry. Wash element and blow dry with low compressed
NOTE
air.
When installing new belts, never pry the
(3) Inspect element for excessive wear or
belts over the pulley grooves.
loss of capacity to retain dust and dirt. Replace a
defective element.
(1) Move the motor away from the
CAUTION
compressor until there is tension on the V-belts.
Use cleaning solvent Fed. Spec. P-D-680 for
(2) Depress one of the V-belts midway
cleaning. Never use gasoline or similar
between the pulley and flywheel; when the top lines up
fluids to clean the air intake muffler.
with the bottom of the belt next to it under normal thumb
pressure the tension is correct.
(4) Reassemble the air intake muffler in
reverse order of the numerical sequence shown in figure
CAUTION
Do not adjust the V-belts too tightly as this
will overload motor and compressor
3-10. Air Receiver
bearings. Also check and be sure pulley
a. General. The air receiver stores compressed
alinement is maintained.
air at a pressure between 140- and 175-psi.
Compressed air, moving from first stage to second
(3) Tighten motor mounting bolts securely.
stage of the compressor through the inter-cooler tube,
then through the aftercooler tube to the air receiver,
3-8.
Air Compressor
carrier
a. General. The compressor unit part of the
assembly, kept clean and lubricated, should be
Change 2 3-5
