FScurtis FCT02C48H9X-A1X1XX Instructions D'utilisation Et Manuel De Pièces page 13

TROUBLESHOOTING GUIDE (CONTINUED)
SYMPTOM
Excessive noise (knocking)
(Continued)
Oil in the discharge air
Air leaking from unloader on
pressure switch
POSSIBLE CAUSE(S)
6. Piston hitting the valve plate
7. Noisy check valve
1. Worn piston rings
2. Compressor air intake restricted
3. Restricted breather
4. Excessive oil in compressor
5. Wrong oil viscosity
6. Connecting rod out of alignment
Check valve stuck in open position
CORRECTIVE ACTION
6. Remove the compressor head and valve plate
and inspect for carbon deposits or other foreign
matter on top of piston. Replace head and valve
plate using new gasket.
7. Replace.
1. Replace with new rings.
2. Clean filter. Check for other restrictions in the
intake system.
3. Clean and check breather for free operation.
4. Drain down to full level.
5. Use FSC-1000A ISO-100 Premium Reciprocating
Compressor Lubricant
6. Replace rod.
Remove and replace check valve
11
Do not disassemble check
valve with air in tank.