ONBOARD AIR SYSTEMS & AIR TANKS TROUBLESHOOTING:

Problem:
Tank pressure drops after compressor shuts off at appropriate OFF pressure (as indicated by pressure switch) and confirmed by tank pressure gauge.
Possible Cause:
Leaks are present in your onboard air system.
Solution:
Tighten drain cock, and inspect all fittings and other pneumatic connections for leaks by spraying connections with a solution of water and dish soap. Leaks will be detected where bubbles grow from connections that should be air tight.

Problem:
When the tank is drained, rusty water comes out of the tank.
Possible Cause:
Surface rust is present in the air tank.
Solution:
Drain the tank more frequently to remove condensate. Consider coating the inside of the reservoir with a rust inhibitive sealant by plugging all holes, adding sealant and rotating reservoir until sealant is evenly distributed. Re-plumb when sealant is thoroughly dry.

Problem:
Leader hose leaks at check valve.
Possible Cause:
Improper installation or faulty leader hose with check valve.
Solution:
Replace leader hose with a new leader hose with check valve. Be sure not to tighten the new leader hose at the check valve fitting. Only tighten at the end of the fitting closest to the end of the leader hose.

Problem:
Compressor runs but never shuts off, safety valve may become engaged.
Possible Cause:
Wiring problem, pressure switch failure or relay damage.
Solution:
Always check problems starting with the simplest fix. In this case, you would first check your wiring to ensure that you have no frayed connections. Next, check the relay in the system to ensure proper operation. You may have to replace the relay and/or the pressure switch to return the system to normal operation.

Problem:
Air pressure gauge fluctuates pressure reading from air tank.
Possible Cause:
Damaged air pressure gauge, internal load spring may be too weak to read pressure – causing fluctuation.
Solution:
Replace gauge with a new one.

Problem:
Air Pressure gauge leaks
Possible Cause:

1. Cracked fitting at the rear of gauge
2. Loose fitting
3. Improperly cut air line running to back of gauge.

Solution:

1. Replace gauge
2. Re-apply sealant and tighten fitting.

Cut air line squarely and reinstall air line.

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