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INSTALLATION AND ADJUSTMENT - TM-5-4310-362-140062
Troubleshooting - TM-5-4310-362-140064

TM-5-4310-362-14 Compressor Reciprocating Air: Electric Motor Driven 5 CFM 175 PSI Model 20-904 Manual
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TM 5-4310-362-14
CHAPTER 8
COMPRESSOR ASSEMBLY
8-1.
CHAPTER OVERVIEW
This chapter covers maintenance of the compressor assembly. The compressor assembly consists of:
Air Compressor
Oil Filler, Cap and Plugs
Flywheel
Tube Assemblies
Cylinder Head, Intake and Exhaust Valves
Centrifugal Unloader (Model 20-904 only)
Pistons, Connecting Rods and Cylinder
Crankshaft, Bearings, Oil Seals and Cylinder Block
Section I covers troubleshooting of the whole system. Section II covers maintenance of the air compressor assembly.
Section III covers maintenance of the cylinder head and valves. Section IV covers maintenance of the pistons, crankshaft
and centrifugal unloader.
Section I. TROUBLESHOOTING PROCEDURES
8-2.
GENERAL
The intake and exhaust valves are the most critical parts of the compressor. Loss of pumping efficiency can most often
be traced back to the valves.
However, problems with getting enough air aren't always caused by the compressor. Leaky fittings or an improperly
adjusted pressure switch may also be at fault.
8-3.
TROUBLESHOOTING CHART
The troubleshooting chart has three headings:
MALFUNCTION. Malfunctions listed are the ones most likely to happen. Not all possible malfunctions can be
foreseen and listed.
TEST OR INSPECTION. Tests or inspections are listed to help you find the cause of the malfunction. The tests
that are easiest to do are listed first. The tests that are hardest to do are listed last.
CORRECTIVE ACTION. Corrective actions are listed to help you eliminate the malfunction. Where the corrective
action is too complicated to be listed in full detail, the paragraph number of the detailed procedure is given in
parentheses.
Change 1 8-1






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