Use the Air Compressor Cleaning Kit, Part Number 2892280, to clean and remove internal carbon deposits
and other foreign material from the air compressor cylinder head.
The items below are not included in the air compressor cleaning kit, Part Number 2892280, but are required to
perform the repair.
โข Regulated shop air 621 kPa [90 psi]
โข Automatic transmission fluid (ATF)
โข Shop rags, and a 19 liter [5 gal] bucket
โข INSITETM electronic service tool.
Park vehicle on a level surface and in an area where it is safe to idle for an extended period of time. Chock the
vehicle wheels, and completely drain the vehicle air system.
Remove the air compressor discharge line (1 ), air compressor intake line (2), and air governor signal line (3)
at the air compressor.
Install and tighten the M10 connector (1) into the unloader port of the air compressor housing.
Install and tighten the unloader control valve hose to the M10 connector installed into the air compressor housing.
NOTE: Some air compressors have two unloader ports in the air compressor housing. Make sure that one of the
ports is plugged with an appropriate pipe plug.
Install the discharge line and clamp from kit, Part Number 2892280, onto the discharge port fitting on the air
compressor cylinder head.
Place the discharge line into a 19 liter [5 gal] bucket and cover with several oil absorption pads.
Pour 89 ml (3 fluid ounces] of automatic transmission fluid into the dispensing bottle.
Install the dispensing bottle onto the dispensing hose assembly.
NOTE: For best results, use Dexron III automatic transmission fluid or equivalent.
Install and tighten the dispensing hose assembly and clamp to the intake port of the air compressor cylinder
head.
Connect the regulated shop air at 621 kPa [90 psi) to the air compressor cleaner.
NOTE: The next three steps will happen quickly. For best results, read the remaining instructions prior to continuing
with the cleaning procedure. Do not cycle the unloader until all 89 ml [3 fluid ounces] of ATF have been applied.
Start the engine, and let it idle for 1 minute.
The air compressor may draw in the automatic transmission fluid naturally (no forced air applied). If the
fluid is not pulled from the dispensing bottle, press and hold the ‘Clean’ button (1) on the air compressor cleaner
until all 89 ml [3 fluid ounces] of automatic transmission fluid have been dispensed.
Shut the engine OFF.
Pour 89 ml [3 fluid ounces] of automatic transmission fluid into the dispensing bottle, and install back onto the
dispensing hose assembly.
Toggle the ‘Unloader’ switch (2) on to apply air pressure to the unloader signal port.
Do not relieve pressure at the unloader valve at this time.
Start the engine.
Immediately depress and hold the ‘Clean’ button on the air compressor cleaner until all 89 ml [3 fluid ounces] of
automatic transmission fluid have been dispensed.
Continue to hold the ‘Clean’ button down for an additional 10 to 20 seconds.
NOTE: A heavy mist of automatic transmission fluid should be coming from the discharge hose.
Shut the engine OFF.
Remove the discharge hose assembly from the air compressor cylinder head intake port.
Start the engine.
Continuously cycle the ‘Unloader’ switch on the air compressor cleaner for up to 25 cycles.
NOTE: When the air compressor cylinder head has been adequately cleaned, there should be an audible difference
between loaded and unloaded states of the air compressor. Installation of a 1.5 meter [5 ft] length of
rubber hose over the intake port may help to audibly identify when the unloader is functioning properly.
Verify constant suction at the air compressor cylinder head intake port when the air compressor is loaded
(unloader switch OFF), and fluctuating air flow when unloaded (unloader switch ON). If constant suction is
not present in a loaded state, repeat the cleaning process one additional time.
With the discharge hose still installed, relieve the pressure at the unloader port (switch OFF), and operate the engine
at high idle for 3 – 5 minutes to remove any excess automatic transmission fluid.
Allow engine to return to low idle. Shut the engine OFF.
Remove the unloader control valve hose and M10 connector (1 ).
Install the vehicle air governor and/or signal line (3) and air inlet (2) and outlet (1) connections on the air compressor.
Operate the engine and verify the air compressor is functioning properly.
