Table 3-2. Troubleshooting (Con't).
TEST OR INSP ECTION
Step 3. Pressure switch not set
The pressure switch assembly determines
cut-in and cut-out pressure for the compres-
sor assembly. The switch can be adjusted
for cut-out pressures over the range of 140 to
175 psi. The switch can also be adjusted for a
25 to 65 psi differential between cut-in and
cut-out pressure. The safety valve assembly
releases when the air receiver pressure
exceeds 200 psi.
If the pressure switch is not operat ing
properly, notify Organizational
Compressor Running Hot
Step 1. Check for blockage of
Remove any object that is blocking the air
air to fan wheel.
passage. Use compressed air to remove any
accumulation of dust or dirt.
Step 2. Check oil level.
Refer to paragraph 1, step 2 for checking
Step 3. Check for a clogged
a. Service the muffler intake filter
Check motor terminal board for
a. Tighten loose connections.
b. Clean the terminal board with compressed
If you have a malfunction which is not listed in this table, notify the next higher
level of maintenance.
Section IV. MAINTENANCE PROCEDURES
Belt Guard Assembly.
ventilated area as the fumes are
dangerous if inhaled. Avoid repeated
The belt guard assembly (fig. 3-2)
and prolonged skin contact. Do not
two piece guard that totally encloses the drive belts and
use near open flame or excessive
pulleys. The mesh screening covers the flywheel fan
heat. Flash point of solvent is 100 F.
used to circulate air for cooling the compressor unit.
- 138 F. (38 C. - 59 C.).
b. Inspection. Inspect the guard for damage to
c. Cleaning. Clean the belt guard with a rag dipped in
the screen or panels. Check for accumulation of grease,
cleaning solvent, P-D-680, and dry thoroughly.
dirt, or foreign matter.
Dry cleaning solvent, P-D-680, used
(1) Remove dust and dirt from the motor with
property. Use in a well