Flywheel, Ring Gear and Flywheel Housing

b. Inspection and Repair.

(1) Inspect cover for dents, cracks or breaks.

(2) Examine the cover on a surface plate. If

warping is evident, resurface the cover.

(3) Inspect gears for worn or damaged teeth.

Replace defective gears.

(4) Repair damaged threads with a proper size

tap.

(5) Inspect camshaft thrust plate for scoring and

wear. Replace with new thrust plate, if either indication

shows.

c. Installation. Brace camshaft and tap or press gear

into place. Do not use nut to draw gear onto shaft.

When installing camshaft gear, remove fuel pump and

hold camshaft with a pry bar or heavy screwdriver to

prevent driving expansion plug out of block.

(1) Using new gaskets and seals, install fuel

pump and reverse procedure a. above and perform

steps (2) through (6) below.

(2) Align timing marks on gears as shown in

figure 3-6.

(3) Be sure correct (thin headed) cap screws are

Figure 3-7. Measuring camshaft end play.

used on camshaft thrust plate.

(4) Be sure timing cover mounting screws are

3-8. Flywheel, Ring Gear and Flywheel Housing

correct length for hole in which installed.

a. Removal and Disassembly.

(5) Torque camshaft nut to 85 to 90 foot-pounds.

(1) Remove the engine from the truck, (para 2-6

(6) Using a dial indicator, check end play of

a.) Remove torque converter from flywheel. (para 2-7).

camshaft (fig. 3-7). Clearance should be 0.005 to 0.009

(2) Remove nuts (20, fig. 3-4), and lock washers

inch.

(19) that secure flywheel (21) to engine crankshaft (1).

(7) Tune engine as necessary.

(3) Mark flywheel for reinstallation and remove

flywheel from crankshaft by use of jack screw s.

(4) Drill and chisel ring gear (22) from flywheel

only if necessary to replace ring gear.

(5) Support engine and remove cap screws and

lock washers that secure flywheel housing to engine

block.

b. Cleaning and Inspection.

Ring gear can be

inspected on truck by removing starting motor.

(1) Clean all parts in solvent and dry thoroughly.

(2) Inspect ring gear for cracks, broken or worn

teeth.

c. Assembly and Installation.

Caution:

Be sure to heat the ring gear evenly

at all points and do not allow the

temperature to exceed 400 F. If the

ring gear is heated unevenly, it may

crack; and if the temperature

exceeds 400 F, the temper in the

ring gear might be destroyed.

(1) To assemble the ring gear to the flywheel,

Figure 3-6. Timing valves to camshaft.

heat the ring gear evenly to a maximum temperature

3-6