Service Manual

Air Compressor Carbon Buildup ISB, ISBe and QSB (Common Rail [...]
Page 12-6 Section 12 - Compressed Air System - Group 12
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Pour 89 ml [3 fl oz] 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 fl oz] 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 will
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.