B3.9 and B5.9 Series Engines
A/C Cylinder Head (QE Models) (012-104)
Section 12 - Compressed Air System - Group 12
Install the air lines.
Fill the engine cooling system (liquid cooled air compressor
Operate the engine and check for leaks.
Operate the engine to activate the air compressor.
With the air compressor pumping between 550 to 690 kPa
[80 to 100 psi], use a solution of soapy water to check for
Air Compressor Cylinder Head
(Holset QE Models) (012-104)
The compressed air system normally consists of a gear-
driven air compressor, an air governor, air tanks and all
piston-type compressors that supply compressed air to
operate air-activated devices. The compressor runs con-
tinuously, but has a loaded and unloaded operating mode.