Remove the pipe plugs from the unloader ports used for
accessory air lines.
Install and tighten the accessory air lines.
Connect the line to the unloader valve.
Operate the engine and check for air leaks.
Air Compressor, Cylinder Head (4-06)
Removal
NOTE: The illustrations shown will be of the single cylinder
air compressor. Differences in procedures for one and two
cylinder Holset or Cummins air compressors will be shown
where necessary.
NOTE: On Holset or Cummins two cylinder air compressors,
complete the disassembly and assembly steps for the valve
assemblies on both cylinders.
NOTE: If the cylinder head is removed while the air com-
pressor is on the engine, drain the engine coolant. Refer to
Procedure 1-07.
Caution: The unloader valve body is installed with spring
tension. Use care when removing to prevent personal
injury.
Hold the unloader valve body down and remove the two
captive washer capscrews and the two plain washers.
Remove the unloader valve body.
Remove the o-ring seal.
Remove the rectangular ring seal.
Air Compressor, Cylinder Head (4-06) Section 4 - Compressed Air System
N14Page 4-16
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