2. UNDERHOOD FEAD (Front End Accessory Drive)
Compressor
Bracket
Tensioner
Idlers
Serpentine Belt
Crank Pulley

3. Problem Diagnostics/Troubleshooting
Compressor does not run
Oil temperature too high
Oil level too low
No power to clutch
Drive belt broken
Bad clutch ground
Open clutch stator windings
Park brake not engaged

4. Problem Diagnostics/Troubleshooting
Commpressor shuts down on over-temperature
Excessive high ambient air temperature
Engine cooling system malfunction
Restriction in the compressor oil hoses
Low oil level or incorrect oil
Oil temperature probe failure
Control box failure
Oil Temperature Probe

5. Clutch Replacement

6. Clutch Replacement

7. Problem Diagnostics/Troubleshooting System over pressurizing
Pressure control line plugged or frozen
Pressure relief valve is defective
Inlet valve not closing or faulty seat
Regulator or passage plugged

8. Problem Diagnostics/Troubleshooting
System over pressurizing
Regulator or passage clogged
Pressure regulator setting too high

9. Problem Diagnostics/Troubleshooting
Belt squeals when system is activated
System is still under pressure
Blow-down valve not working or exhaust muffler plugged
Improper belt tension
Belt is glazed
Clutch or Compressor siezed
Tensioner
Belt

10. Problem Diagnostics/Troubleshooting Excessive oil in the air
Scavenge oil return connection
Failed or clogged coalescing separator element
Blocked scavenge line screen or tube.
Excessive oil level (overfilled)
Compressor turned off while running at high speed with air being discharged
Reversed discharge lines
System pressure
connection
Clean air discharge
Air/oil mist enters here from separator tank
Scavenge Tube
Scavenge Screen

11. Problem Diagnostics/Troubleshooting Excessive oil in the air
High oil level
Vehicle not within requirements of 15 ͦ level
Clogged scavenged line screen

12. Problem Diagnostics/Troubleshooting Oil discharge out the air filter
Inlet valve sticking
O-ring seat
Shutting engine off while running at high speed
Inlet valve sticking
Inlet valve O-ring seat leaking
Inlet Valve

13. Problem Diagnostics /Troubleshooting
Inlet Control Valve checking for faults
Pressure Adjustment Screw
Regulator failure
Oil leakages
Inlet valve worn out
Pressure sensors failure
Pressure Bleed Hole
Spring
Regulator
Diaphragm
Valve Seat with Orifice

14. Service Intervals
500 hour interval or 6months - Service kit part number A700205
Includes air filter, oil filter, 4 ltr jug oil & 1ltr bottle oil, decal (next service)
1000 hour interval or 12 months – Service kit part number A700206
Coalescing filter

15. Contact Information
Technical Support:
Mon-Fri 6am-4:30pm Pacific
Parts

16. Support Online Knowledge Base http://kb.vmacair.com/
Clutch Diagnostics and Replacement
Owner’s Manual
Oil MSDS

17. If you have any questions please contact OEM@vmacair.com
THANK YOU!
If you have any questions please contact
ask for the OEM Group