Section IX. FLYWHEEL AND FLYWHEEL HOUSING

TM 10-3930-632-34

Disconnect the linkage from the governor lever

Clean the bearings and all remaining parts

(TM 10-3930-632-12).

with cleaning solvent P-D-680 and dry thoroughly. Dip

Disconnect the hose to the engine oil filter

the bearings in clean engine oil and wrap them in paper

to protect them from dust and dirt.

from the gear cover. Drain the oil from the filter and

Inspect the gear cover for cracks, distortion,

crankcase.

Remove the hex locknuts (fig. 2-3) and lower

damaged sealing surfaces, and other damage; replace a

damaged gear cover.

support pads from the stud of the engine assembly.

Inspect the idler gear and shaft for worn or

Hoist the engine just enough to raise the upper support

chipped gear teeth and a scored or worn shaft; replace if

pad off the frame. Block the engine in this position.

Disconnect the hydraulic lines from the

damaged.

Inspect all other parts for cracks, distortion,

hydraulic pump (TM 10-3930-632-12).

Remove the capscrews and bolts (fig. 9-19),

worn or damaged threads, and other damage; replace

damaged parts.

nuts, lockwashers and copper washers that secure the

gear cover to the engine block; remove the gear cover

from the engine block.

9-21.

Reassembly and Installation

Remove the governor lever and related parts

Refer to figure 9-19 and reassemble and

from the gear cover (para 9-6).

install the idler gear and gear cover.

Remove the idler gear (33, fig. 9-19) and

Connect the hydraulic lines to the main

spindle (35). Remove the gear screw (31) and thrust

hydraulic pump (TM 10-3930-632-12).

washer (32) from the shaft.

Lower the engine so that the support pad is

Press the seal (18) from the gear cover.

resting on the truck frame; install the bottom support

Remove the bearing from the shaft of the idler

pads, spacer and nuts (fig. 2-3).

gear only if necessary for replacement.

Connect the hose from the engine oil filter to

the gear cover; fill the crankcase (LO 10-3930-632-12).

Secure the crankshaft pulley (4, fig. 9-20) to

WARNING

the crankshaft, using the bolt (1) and washer (2).

Dry cleaning solvent, P-D-680, used to clean

Position the fan and generator drive V-belts on

parts is potentially dangerous to personnel and

the pulleys (TM 10-3930-632-12). Connect the linkage

property. Avoid repeated and prolonged skin

devises to the lever.

contact.

Do not use near open flame or

Install the muffler, radiator, and counterweight

excessive heat. Flash point of solvent is 100 F.

(TM 10-3930-632-12).

- 138F. (39 C. - 59 C.).

9-20.

Cleaning and Inspection

Discard and replace all gaskets and seals.

Section IX. FLYWHEEL AND FLYWHEEL HOUSING

9-22.

General

WARNING

The flywheel is connected to the rear of the

crankshaft to help smooth the rotational force produced

Dry cleaning solvent, P-D-680, used to clean

by the engine. It is provided with a ring gear around its

parts is potentially dangerous to personnel and

exterior. The pinion of the engine starter engages this

property. Avoid repeated and prolonged skin

ring gear to turn over the engine when starting. The

contact.

Do not use near open flame or

excessive heat. Flash point of solvent is 100 F.

flywheel housing houses the flywheel and provides a

- 138 F. (39 C. - 59 C.).

mounting from the equipment driven by the engine.

9-23.

Removal

9-24.

Cleaning, Inspection, and Repair

Clean the flywheel and flywheel housing with

With the engine removed from the truck, remove the

cleaning solvent P-D-680 and dry thoroughly.

flywheel and flywheel housing as follows:

Inspect the flywheel housing for cracks,

Remove the six nuts (24, fig. 9-20) and

distortion, and damaged threads; replace a damaged

lockwashers (25) that secure the flywheel (27) to the

flywheel housing.

crankshaft (26); remove the flywheel.

Inspect the flywheel for chipped, cracked, or

Remove the screws (29 and 32, fig. 9-26) and

washers (30 and 33) that secure the flywheel housing

(35, fig. 9-20) to the block; remove the flywheel housing.

9-16