GMC MOC6L Instruction Manual page 14

Problem
Vibration or abnormal noise
Insufficient pressure or decreased
outlet capacity
Troubleshooting continued
Possible cause
Loose part
Foreign body in main compressor
Piston connecting with the valve seat
Moving parts excessively worn
Motor running too slow
Leaking safety valve
Leaking pipe
Damaged gasket
Damaged or carbon coated valve seat
Damaged piston ring or cylinder
Incorrectly adjusted regulator
14
Suggested remedy
Use authorised service centre
to check and repair if necessary
Use authorised service centre
to check and clean if necessary
Use authorised service centre
to increase size of gasket
Use authorised service centre
to repair or replace
Use authorised service centre to check
and repair if necessary
Use authorised service centre to repair
or replace the switch
Use authorised service centre to check
and repair if necessary
Use authorised service centre to check
and repair if necessary
Use authorised service centre to check
and repair if necessary
Use authorised service centre to check
and repair if necessary
Adjust and set the regulator correctly.