HYDRAULIC CONTROL VALVE INSPECTION.

TM 10-3930-623-34

3. Actuate control valve and displace cylinder to

2. Using screw eye bolts in the special cylinder

opposite end of tube assembly.

head screws at each end of cylinder head and chain

4. If any leakage is noticed around seams, joints,

hoist, position engine in truck chassis.

or glands, repair or replace parts as required to correct

3. Install 5/8 X 3-1/2 inch screws, flat spacer

leaking.

washers, mounting insulatory and tubular spacer holding

fan end of engine to chassis.

7-60.

HYDRAULIC CONTROL VALVE INSPECTION.

NOTE

1. Inspect control valve body (37, figure 4-6) for

Flywheel end of engine is supported

cracks and damage. Inspect all threaded surfaces for

through the transmission and drive

damage and crossed threads. Discard damaged parts..

axle.

2. Inspect handles and control linkage for wear,

distortion, and damage. Repair or replace parts as

7-67.

TRANSMISSION AND TORQUE

necessary.

CONVERTOR INSTALLATION.

3. Inspect valve spools for scoring, wear and

damage. Check valve body bore in same manner.

1. Assemble torque convertor (5, figure 4-11) to

Check spring for loss of tension and damage. If spools

input shaft of transmission (49).

or body are damaged, replace entire valve assembly.

NOTE

7-61.

UPRIGHT

ASSEMBLIES

INSPECTION.

Assembly

requires

the

careful

Thoroughly inspect and examine all parts prior to

alignment and mating of three pairs

assembling the disassembled uprights. Replace any

of splined shafts.

component which shows evidence of excessive wear,

cracks, fractures or damage. Replace any part when in

2. Install a suitable eyebolt in top of transmission

doubt as to its serviceability.

case (85, figure 4-14) and lift transmission to mate with

engine flywheel housing. Pilot of torque converter must

enter crankshaft recess.

7-62.

LIFT CHAINS INSPECTION.

3. Install twelve screws (3, figure 4-11) and

Refer to TM 10-3930-623-12.

washers (4) attaching transmission to flywheel housing.

7-63.

CROSSHEAD ASSEMBLY INSPECTION.

NOTE

Inspect rollers (25, figure 4-3) and bearings (26) for wear

Mating surfaces must be perfectly

and damage. Check bearings for free rotation. Inspect

clean to prevent misalignment or

crosshead (34) for evidence of excessive damage.

runout of the power train, effecting

Replace if in doubt of parts serviceability.

the life of the bearings.

7-64. CARRIAGE ASSEMBLY INSPECTION. Inspect

4. Through flywheel housing top hand hole, install

rollers (45 and 55, figure 4-3) for wear and damage.

six screws (6) and washers (7 and 8) attaching torque

Roller bearings (55) must be smooth without pitting,

convertor drive disk to flywheel. Replace hand hole

scoring or other defects. Examine carriage (56) for

cover.

evidence of excessive wear.

5. Remove support holdin g engine but support

engine-transmission assembly as a unit.

7-65. REASSEMBLY OF MAJOR COMPONENTS.

7-68. DRIVE AXLE INSTALLATION. The truck chassis

sits upon the axle housing. This requires chassis to be

NOTE

raised sufficient to clear axle. Install axle as follows:

The truck is assembled from

reassembled components in a logical

1. Raise forward end of truck chassis at least 4

sequence

from

completely

inches.

disassembled truck to a completed

2. Supporting differential section of the axle (43,

truck. Where the truck has not been

figure 4-11), roll axle into position.

completely disassembled, omit those

3. Using gasket shim pack (14 and 18) previously

paragraphs which do not apply.

selected to provide correct gear tooth contact pattern

and backlash, assemble axle to the transmission (49).

7-66. ENGINE INSTALLATION.

1. Assemble engine mounting bracket (1, figure 4-

18) to timing gear cover with two 1/2 X 1-1/4 inch and

NOTE

one 5/8 X 1-1/2 inch screws.

It is recommended that outer gaskets

of shim pack be the thinner ones to

provide the best sealing combination.

7-17