Ingersoll Rand SS815R/7C3372 Air Starter Motor

The Ingersoll Rand SS815R/7C3372 is a robust pre-engaged vane air starter motor from the SS800 series, designed for demanding engine cranking in harsh environments. This model delivers exceptional breakaway torque of 250 ft-lb (339 Nm) at 150 PSI, powering diesel engines up to 20,000 CID with maximum 75 HP (56 kW) output. Engineered for reliability, it features a sealed design compatible with air or natural gas, making it a top choice for industrial and marine applications.

Technical Specifications

• Model: SS815R/7C3372 (OEM cross-reference: 7C3372)

• Type: Pre-engaged vane motor, right-hand rotation

• Max Pressure: 150 PSI (10.3 bar)

• Breakaway Torque: 250 ft-lb (339 Nm) at 150 PSI

• Max Power: 75 HP (56 kW) at 3200 RPM

• Air Flow at Max HP: 1700 SCFM (802 L/s)

• Weight: Approx. 93 lbs (42.2 kg)

• Mount: SAE #3 flange, 12 teeth pinion, rotatable housing

• Operation Range: 90-150 PSI, suitable for diesel 1000-20,000 CID

Applications

• Marine propulsion and auxiliary engines

• Oil and gas drilling rigs and power generation​

• Off-highway heavy equipment and mining machinery​

• Caterpillar engines like 3508B, 3512C, 3516B, G3512, G3516B

• Industrial fire pumps and stationary generators​

Usage Instructions

• Connect to clean, lubricated air supply at 90-150 PSI using recommended strainers and lubricators like NL-24-8​

• Mount on SAE #3 flange, align pinion with 12-tooth flywheel, and secure with offset housing for optimal fit

• Activate via solenoid valve (e.g., 150BMP-2451B) or push-button for quick pre-engagement and cranking​

• Perform routine tune-ups with SS800-TK2 kit to maintain peak performance and longevity