Air Equipment - General Information
Air Compressor
The air equipment group consists of Cummins single and two-cylinder air compressors, compressor check valves,
and air and coolant piping. It also includes air activated cranking motors.
The air compressor is lubricated by engine lubricating oil which enters the compressor through a drilling in the
support. The oil lubricates the connecting rod bearings and the crankshaft. The oil then flows to the air compressor
crankcase and returns to the engine through a drain passage located in the support.
The air compressor is cooled by the engine coolant. Only the cylinder head is cooled on the single cylinder air
compressor. Both the cylinder head and cylinders are cooled on the two-cylinder air compressor.
Service information, specifications, and repair of Cummins air compressors are contained in the following
publications:
• Single cylinder air compressor - Air Equipment Rebuild Manual, Bulletin No. 3810242
• Two-cylinder air compressor - Air Equipment Rebuild Manual, Bulletin No. 3810257
Instructions for testing and repairing air cranking motors and air compressors not manufactured by Cummins can
be obtained from the original equipment manufacturers.
The following list contains the addresses of suppliers of air equipment for use on Cummins engines:
U.S.A.
Bendix H.V.S.G.
901 Cleveland St.
Elyria, OH 44036
Attention: Technical Services Dept.
Engine Starting Systems
Allen and Martinsville Rd.
P.O. Box 1776
Liberty Corner, NJ 07938
Midland Brake, Inc.
490 South Chestnut St.
Owosso, MI 48867
Canada
Bendix H.V.S.G.
P.O. Box 5712
1005 Wilton Grove Rd.
London Ontario, Canada N6A4S8
Attention: Technical Services Dept.
International
Bendix H.V.S.G. Europe Ltd.
66 Grosvenor St.
London, England W1X90B
Attention: Technical Services Dept.
General Information Air Equipment
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