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Engine Cylinder Head
Low-Pressure Safety Valve

TM-5-4310-227-15 Compressor Reciprocating: Air; Gasoline Engine 15 CFM 175 PSI; Receiver Mounted (Champion Pneumatic Model OEG-458-ENG-1) Manual
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TM 5-4310-227-15
and gradually tighten in the proper
c. Installation.-
sequence as shown in fig. 3-29).
(1) Install the cylinder head stud (5) in
(4)
Use a torque wrench and tighten the
the cylinder and crankcase assembly
capscrews to a torque of 32 foot-
(17) if removed.
pounds.
(2) Position a new cylinder head gasket
Secure the air shroud (22, fig. 3-18)
(5)
(33) on the cylinder and crankcase
to the cylinder head with the two
assembly. Place the cylinder head on
screws (32) and lockwashers (31).
the gasket with the holes alined.
Install the spark plug (para 3-44).
(6)
(3) Install the five capscrews ((7 and 8),
Install the fuel tank bracket (para 3-
(7)
according to length, with lockwashers
35).
Section XII. COMPRESSOR ASSEMBLY AND COMPONENTS
Caution: Operating the unit in sandy or
3-71. General
dusty areas without the air cleaner can cause
The compressor assembly is a 2-cylinder, 2-
damage to the air compressor.
s t a g e , air cooled, reciprocating type com-
pressor. Air is drawn through the air cleaner
3-73. Pipe Cap, Pipe Nippler and Oil
into the low-pressure cylinder. From the low-
Filler Plug
pressure cylinder the air is forced through the
a. Removal.
intercooler tube, where it is cooled, to the high
(1) Remove the pipe cap (19, fig. 3-30)
pressure cylinder. The compressed air is then
from the pipe nipple (20) and drain
d i s c h a r g e d into the aftercooler manifold,
the oil from the crankcase (21).
through the check valve into the air receiver
(2) Remove the pipe nipple (20) from the
tank. The check valve prevents the air in the
crankcase.
air receiver tank from flowing back into the
(3) Remove the oil filler plug (18) from
after-cooler manifold.
the crankcase.
b. Cleaning, Inspection, and Repair.
3-72. Air Cleaner
(1) Clean all parts with an approved
cleaning solvent and dry thoroughly.
a. Removal and Disassembly. Refer to para-
(2) Inspect all parts for cracks, breaks,
graph 3-6 for removal and disassembly of the
worn threads, and other damage. Re-
air cleaner.
place a damaged part.
b. Cleaning, Inspection, and Repair.
c. Installation.
(1) Refer to paragraph 3-6 for cleaning
(1) Install the pipe nipple (20) in the
instructions.
crankgase (21) and install the pipe
(2) Inspect for cracks, breaks, dents, and
cap (19) on the pipe nipple.
torn threads.
(2) Add oil to the crankcase as specified
(3) Replace any defective parts.
in the lubrication order.
(3) Install the oil filler plug (18) in the
c. Reassembly and Installation.  Refer to
crankcase.
paragraph 3-6 for reassembly and installation
procedures.
3-74. Breather Tube and Unloader Tubing
a. Removal.
d. Field Expedient Repairs. If the air com-
(1) Breather tube.
pressor fails to build up pressure due to a
(a) Loosen the compression nuts (7,
clogged air cleaner, remove the air cleaner (see
fig. 3-30) that secure the breather
a above). Securely fasten a suitable section of
tube (8) to the adapter (12) and
clean, fine, meshed screen, if available, over the
to the elbow (6), and remove the
open end of the manifold and operate the unit
breather tube.
without the air cleaner.
3-62






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