Section XIX. Torque Converter Assembly
a. Torque converter assembly is mounted on engine sub frame and bolted to engine. The winch chain drive
sprocket is attached directly to output shaft of torque converter. The assembly also contains a clutch with a hand
operated lever. When clutch is engaged, power is transmitted to driving end of torque converter where converter fluid
transmits engine power to torque converter turbine disc, then to chain drive sprocket. The torque converter fluid is diesel
fuel, and fluid level is maintained by engine fuel pump. Figure 5-36 illustrates diesel fuel piping system.
Insure that engine is shut down and clutch disengaged prior to conducting maintenance on torque
converter drive sprocket, drive chain assembly, winch drive shaft or any part of winch gear
assembly. With engine running and clutch engaged entire winch drum drive mechanism will be
moving. Serious equipment damage and severe personal injury can occur if all covers and
housings are not in place when drive system is in operation.
b. The only control located on the rear of winch is the hand lever for the torque converter clutch.
5-82 Torque converter removal and inspection
a In order to remove torque converter, drive end (small end) of chain case must be disconnected.
b. Drain converter of all fluid and lubricating oil.
c. Using a suitable hoist or hoists, support weight of the converter before removing any converter mounting bolts.
Refer to Figure 5-37.
Chain case support is unbolted from engine sub frame during torque converter removal. Leave
support in place on chain case until starting maintenance on torque converter.
Insure that all fluid openings and lines are capped or plugged immediately upon removal of the
lines. The very close tolerances of torque converter can be seriously damaged by small amounts
of dirt and other foreign material.