B3.9 and B5.9 Series Engines
A/C Cylinder Head (SS 191 Model) (012-101)
Section 12 - Compressed Air System - Group 12
Remove the inlet valve cage (12).
Remove the following parts:
· Spring (11)
· Inlet valve disc (10)
· Inlet valve seat (13)
· Copper washer (2).
Discard the copper washer
When using solvents, acids, or alkaline materials for
cleaning, follow the manufacturer's recommendations
for use. Wear goggles and protective clothing.
Wear appropriate eye and face protection when using
compressed air. Flying debris and dirt can cause bodily
Soak the parts in a kerosene emulsion-based cleaner de-
signed to remove carbon. The cleaner must have a pH of
9.5 or less to avoid turning aluminum parts black. The
cleaner manufacturer or supplier can be contacted about
solution concentration, temperature, and soak time.
Dry with compressed air.