DEFINITION: Perform this test in order to verify the automatic level control air compressor performance and to identify and repair the potential leaks in the automatic level control air compressor assembly.

1

1. Disconnect the electrical connection to the automatic level control air compressor assembly.
2. Disconnect the air line from the air dryer.
3. Connect the air dryer to the J 22124-B (using the adapter J 22124-98) on the side opposite of the toggle valve. Close the toggle valve (down position).
4. Using fused jumpers, connect the automatic level control air compressor terminal A and E to a 12 V+ source, and terminal D and G to ground. This step will activate the compressor motor.
5. Allow the compressor to run until the J 22124-B gauge pressure reads at least 750 kPa (110 psi).
6. Disconnect the power supply to the compressor.

Does the compressor develop at least 750 kPa (110 psi)? The compressor may leak down as low as 620 kPa (90 psi) after disconnecting the power. This is an acceptable level.

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Go to Step 5

Go to Step 2

1. Apply service air to the J 22124-B service valve until the gauge reads 690 kPa (100 psi).
2. Using a soap bubble solution, check for leaks in the compressor assembly:

•	The air dryer O-ring casting bore (1).

•	The air dryer (2). Replace the dryer/exhaust/blocker valve assembly.

•	The cover bolts (3).

Tighten
Tighten the cover bolts as required to 6 N·m (53 lb in).

•	The head casting air intake and exhaust opening (4). Replace the head assembly if you find a leak.

•	Around the edge of the solenoid valve terminal housing (5). Replace the head assembly if you find a leak.

•	Around the edge of the cover gasket (6). If you find a leak, check the tightness of the cover bolts before you replace the gasket.

3. Complete repairs as necessary.

Did you find and repair any leaks?

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Go to Step 3

Go to Step 4

Re-apply the service air and monitor the compressor assembly for leaks.

Does the pressure leak down below 620 kPa (110 psi)?

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Go to Step 4

System OK

1. Replace the compressor assembly.
2. Perform the system operation check to verify the repair.

Was the repair completed?

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Go to Step 5

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Monitor the J 22124-B pressure gauge for 1 minute.

Does the pressure leak down below 620 kPa (90 psi)?

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Go to Step 2

System OK