Service Manual

Air Compressor Carbon Buildup ISB, ISBe and QSB (Common Rail [...]
Page 12-4 Section 12 - Compressed Air System - Group 12
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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.
CAUTION
While cleaning the air compressor cylinder head, do
NOT install the original intake or discharge plumbing.
Only use the intake and discharge lines and fitting
supplied with the air compressor cleaning kit during
this procedure.
Install the discharge line and clamp from kit Part Number
2892280 onto the discharge port fitting on the air
compressor cylinder head.