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AJAX Integral Engine
& Compressor Parts

As the Original Equipment Manufacturer (O.E.M.) of AJAX engines and compressors,
Cooper has all the parts you'll ever need.

your one-stop-shop for ajax o.e.m. parts

Genuine O.E.M. Cooper parts for AJAX integral engines and compressors are backed with decades of engineering, manufacturing, and in-field experience in material wear. We provide spare AJAX engine parts that are manufactured to the latest standards and technical advancements. We are committed to making every AJAX part with our own brand of O.E.M. quality and to O.E.M. standards. We are committed to stocking and delivering AJAX engine parts to our customers quickly and efficiently, and that’s why we house thousands of AJAX part numbers at our dedicated central distribution center in Houston, and in field locations around the world. We provide all the AJAX parts you’ll ever need for AJAX production models.

WE PROVIDE PARTS FOR THE FOLLOWING AJAX INTEGRAL ENGINES & COMPRESSORS

Designed for simplicity and durability since the 1950s, many AJAX integral engine-compressor units are still in service today. A low-maintenance, reliable piece of equipment is comprised only of components that are strictly necessary. Fewer parts means a smaller margin for error.

ModelBore × Stroke (in)Rated Speed (rpm)Rated HP (bhp)BMEP (psi)Number of Power Cylinders
DPC-609½ × 124755856.51
DPC-1209½ × 1247511556.52
DPC-8011 × 144007757.11
DPC-16011 × 1440015457.12
DPC-8110½ × 124757862.41
DPC-16210½ × 1247515662.42
DPC-10512 × 1442510159.31
DPC-11513¼ × 16360110551
DPC-115LE13¼ × 16360110551
DPC-23013¼ × 16360221552
DPC-230LE13¼ × 16360221552
DPC-14013¼ × 1640013460.31
DPC-140LE13¼ × 1640013460.31
DPC-28013¼ × 1640026960.32
DPC-280LE13¼ × 1640026960.32
DPC-450LE13¼ × 1640043264.63
DPC-30015 × 16360288562
DPC-300LE15 × 16360288562
DPC-18015 × 1640017360.51
DPC-180LE15 × 1640017360.51
DPC-36015 × 1640035660.52
DPC-360LE15 × 1640035660.52
DPC-54015 × 16400540633
DPC-540LE15 × 16400540633
DPC-72015 × 16400720634
DPC-720LE15 × 16400720634
DPC-60015 × 1640057667.23
DPC-600LE15 × 1640057667.23
DPC-80015 × 1640076867.24
DPC-800LE15 × 1640076867.24
DPC-220113¼ × 1644014860.41
DPC-2201LE13¼ × 1644014860.41
DPC-220213¼ × 1644029660.42
DPC-2202LE13¼ × 1644029660.42
DPC-280115 × 1644019261.11
DPC-2801LE15 × 1644019261.11
DPC-280215 × 1644042267.22
DPC-2802LE15 × 1644038461.12
DPC-280315 × 1644063467.33
DPC-2803LE15 × 1644060063.73
DPC-280415 × 1644084567.24
DPC-2804LE15 × 1644080063.74

WE PROVIDE PARTS FOR THE FOLLOWING AJAX Gas Engine Product Models

The AJAX gas engine offers less maintenance, lower field costs, and a proven, rugged design. The standard single-cylinder, two-stroke, clean-burning engine meets current federal emission regulations without additional control systems.

ModelBore × Stroke (in)Rated Speed (rpm)Rated HP (bhp)BMEP (psi)Number of Power Cylinders
EA-155 × 6½9001449.61
EA-226½ × 86502148.51
EA-307¼ × 86502953.11
C-307½ × 105252949.21
C-428½ × 105254053.61
E-428½ × 105254053.61
E-5658½ × 105254053.21
DP-609½ × 124755856.51
DP-8011 × 144007757.11
DP-16011 × 1440015457.12
DP-8110½ × 124757862.41
DP-11513¼ × 16360110551
DP-23013¼ × 16360221552
DP-12513¼ × 1638012056.71
DP-25013¼ × 1638024056.72
DP-16515 × 1638015858.41
DP-32515 × 1638031257.52

WE PROVIDE PARTS FOR THE FOLLOWING AJAX Separable Compressor

The environmentally friendly AJAX separable compressor has the economic advantages of an AJAX slow-speed compressor without the air quality permit issues related to an internal combustion engine.

ModelStroke (in)Rod Diam (in)Rated Pwr (bhp)Rated Speed (rpm)Number of ThrowsCon Rod Length (in)GAS Rod Load (lbf)
C-202   11.000    2.500    200.0      455        2   23.750  33000.0
C-302   11.000    2.500    300.0      455        2   23.750  33000.0