Product Manual
CA / CT SERIES
  CAP600 
Page 
27
 of 
30
   REV B June 2012
Problem  Cause  Remedy 
7 
Low discharge 
pressure 
• Manual drain not fully closed 
(standard model) 
• Automatic drain not fully closed (if 
applicable) 
• Clogged air filter / intake 
• Leaks in air distribution system 
• Clogged air distribution system 
• Worn out pressure switch 
• Belt slipping 
• Worn piston rings 
• Worn head gasket 
• Worn valves 
• Close the drain cock 
• Clean or replace automatic drain 
• Replace the filter 
• Check fittings, bushings and 
connections for leaks 
• Clean air distribution system 
• Replace pressure switch 
• See 6 
• Replace with ring kit 
• Replace with gasket kit 
• Replace with valve kit 
8 
Excessive belt 
wear 
• Belt too tight or too loose 
• Incorrect belt 
• Exposure to abrasive dust 
• Working pressure too high 
• Worn or misaligned pulley 
• Adjust belt tension 
• Use correct belt 
• Eliminate dust or relocate unit 
• Lower working pressure 
• Replace or realign pulley 
9 
Lubricant appears 
milky 
• Water in the crankcase 
• Incorrect oil 
• Water contaminated oil 
• Water leaking back through 
discharge valve 
• Compressor not running long enough to 
prevent condensation 
• Use correct oil 
• Replace oil 
• Re-pipe with drip legs and pitch piping 
away from the compressor 
10
Excessive oil in 
compressed air 
• Oil level too high 
• Incorrect oil 
• Piston ring not fully seated 
• Worn piston ring 
• Bleed excess oil 
• Use correct oil 
• Allow 100 hours to break in rings 
• Replace with ring kit 
11
Motor overloads 
• Working pressure too high 
• Incorrect voltage 
• Lower working pressure 
• Contact distributor 
If your problem is not resolved after performing troubleshooting, or not listed above, please 
contact your local distributor for more assistance. 










