Section IV. TIMING GEARS AND CAMSHAFT

TM 10-3930-630-34

(5) Install connecting rod bearing cap and

(8) Replace bearings if they do not meet

specifications stated above.

evenly tighten nuts to a torque of 40 to 45 foot pounds

(54.2 to 61.0 N ).

(9) Refer to TM 10-3930-630-12 and install

cylinder head.

(6) Try to move the connecting rod from side

(10) Refer to paragraph 11-7 and install the oil

to side. A well fitting bearing should be just loose

pan.

enough to be snapped from side to side. This condition

(11) Refer to paragraph 2-24 and install the

shows the bearings and crankpins are satisfactory.

engine in the truck.

(7) Remove connecting rod bearing cap and

remove feeler stock.

Repeat operation for each

connecting rod bearing, one at a time.

Section IV. TIMING GEARS AND CAMSHAFT

and fan drive in numerical sequence as illustrated in

11-20. Description

figure 11-25.

The gear train consists of the crankshaft gear, the

camshaft gear and fan drive gear. The crankshaft gear

11-22. Gear Cover and Fan

Drive,

Cleaning,

drives the camshaft gear, which in turn drives the fan

Inspection and Repair

drive gear.

a. Clean all metal parts in cleaning compound,

11-21. Gear Cover and Fan Drive, Removal and

solvent (Fed. Spec. P-D-680) and dry thoroughly.

b. Inspect all gears for wear, broken teeth and

Disassembly

other damage.

a. Removal.

c. Inspect fan drive adapter shaft for wear,

(1) Refer to TM 10-3930-630-12 and remove

damage, and bearing for good condition.

radiator belts and fan.

d. Inspect gear cover for cracks and damage.

(2) Refer' to paragraph 2-12 and remove the

hydraulic pump.

e. Replace unserviceable parts.

(3) The gear cover and fan drive is removed in

the disassembly procedure.

b. Disassembly. Disassemble the gear cover

11-17