SECTION II. INTERMEDIATE DIRECT SUPPORT MAINTENANCE PROCEDURES
4-5.GENERAL. This section contains disassembly, assembly, inspection, and repair instructions for the compressor
components listed in Appendix B, Section III, Maintenance Allocation Chart. Paragraph references are listed below for
each grouping for locating repair instruction:
Paragraph 4-6, Compressor Assembly: Compressor Unit, Piston and Connecting Rods, Crankcase Bearings.
Paragraph 4-10, Electric Motor.
4-7.COMPRESSOR UNIT. This task covers:
Tools. General Mechanic Automotive Tool Set, T1 5800-00-177-7033; Field Maintenance Automotive Repair
Shop Set, T2 4910-00-754-0705.
Materials/Parts. Gasket Set; Engine Lubricating Oil, OE 30 or equivalent (Appendix E, Item 3).
Equipment Condition. Compressor unit removed (paragraph 3-27) and placed on workbench; Cylinder head
assemblies removed (paragraph 3-32).
General Safety Requirements.
Observe all Warnings and Cautions.
Never wear loose clothing or jewelry while inspecting or servicing equipment.
Beware of rotating shafts, pulleys and fans which could entrap personnel and cause serious injury.
Disconnect main power and turn compressor unit off before performing maintenance procedures.
There are two low pressure cylinders and one high pressure cylinder in this model. The two low pressure
cylinders are identical and require identical maintenance.
Remove capscrews (1) securing cylinder (2) to crankcase (3).
Pistons and connecting rods may be damaged by hitting crankcase when cylinder is removed. Support
pistons when removing cylinder.