3304 & 3306 INDUSTRIAL & MARINE ENGINES Caterpillar

4N4370 (Ingersoll-Rand Number 150 BMP-C78RH-53)

Output torque ... 50 lb. ft.(70 N·m)

with pinion speed of ... 2240 rpm

at air pressure to motor of ... 120 psi(830 kPa)

Rotation is clockwise when seen from drive end.

(1) Torque for bolts of rear cover (tighten bolts evenly) ... 20 to 25 lb. ft.(25 to 35 N·m)

(2) Torque for bolts of pinion housing (tighten bolts evenly) ... 100 lb. in.(11.3 N·m)