A/C Cylinder Head (SS 191 Model) (012-101)
B3.9 and B5.9 Series Engines
Section 12 - Compressed Air System - Group 12
Air Compressor Cylinder Head
(Holset SS191 Model) (012-101)
When using a steam cleaner, wear safety glasses or a
face shield, as well as protective clothing. Hot steam
can cause serious personal injury.
Wear appropriate eye and face protection when using
compressed air. Flying debris and dirt can cause bodily
Drain the engine coolant if the air compressor has
a liquid cooled cylinder head. If compressor is air
cooled, then the engine coolant need not be drained.
Refer to Procedure 008-018 if coolant needs to be
Open the draincock on the wet tank to release air
from the system. Close the draincock after the pres-
sure is released.
Remove the air connections from the air compressor.
15/16 Inch, 7/8 Inch
Remove the coolant lines from the air compressor (does
not apply to air cooled compressors).