Engine System - Operation/How the 37 kW auxiliary drive works HOW THE 37 KW AUXILIARY DRIVE WORKS A drive gear (A) on the engine crankshaft transmits power through an idler gear (B) to the auxiliary (output) drive gear (C) for driving engine accessories. The output shaft at the front (D) is equipped with an SAE 5/8-9 tooth “A”-spline and 2-bolt mounting. The output shaft at the rear (E) is equipped with an SAE 7/8-13 tooth “B” spline which can have either a 2-bolt or a 4-bolt mounting.
RG5173 -UN-30NOV88 RG5174 -UN-30NOV88 A—Drive gear B—Idler gear C—Auxiliary (Output) drive gear D—Output shaft (at front) E—Output shaft (at rear) CD,3274,G205,6 -19-15MAY92 CTM3274 (01JUL99) 205-8 Saran Liter Engines 060799 PN=321 Auxiliary crankshaft gear (A) is located in front of the regular crankshaft gear (B) and mounts on a tapered collet (C) which provides the press fit necessary for transmitting power. The amount of press is determined by the loading of pulley (D) or damper pulley against the gear on the collet when cap screw (E) is tightened to the specified torque. A thick washer (F) is used to help prevent loss of cap screw torque.
An O-ring (G) is used to prevent external seepage of engine lube oil. NOTE: Engines equipped with the auxiliary gear drive option have a “long-nose” crankshaft. A—Auxiliary crankshaft gear B—Regular crankshaft gear C—Tapered collet D—Pulley E—Cap screw F—Washer G—O-ring -UN-30NOV88 RG5175 CD,3274,G205,7 -19-15MAY92 205 8