Reassembly - TM-10-3930-634-340097

TM 10-3930-634-34

(15) Make sure the flywheel housing is supported

adequately with a sling and hoists.

(16) Strike the front face of the flywheel housing

(12) alternately on each side of the engine with a soft

hammer to loosen and work it off dowel pins.

(17) Remove shim (13) and gasket (14).

c. Disassembly.

(1) Disassemble the flywheel housing in numerical

sequence as shown in figure 3-101.

(2) Drive oil seal (28, fig. 3-101) from housing (12)

with a suitable drift.

d. Cleaning and Inspection.

(1) Clean all parts thoroughly with cleaning sol-

vent P-D-680 and dry thoroughly.

(2) Clean all traces of gasket material from fly-

wheel housing and end plate.

(3) Inspect the flywheel housing for cracks or

other damage. Replace a damaged flywheel housing.

( 4 ) Inspect all threaded parts for damaged

threads. Replace parts that have damaged threads.

e. Reassembly.

(1) Install new oil seal in the flywheel housing

(2) Install new gasket (14, fig 3-101) on the rear

(fig. 3-103). Seal should be flush with outer face of

face of the cylinder block end plate.

housing bore.

(3) Install shim (13) on the left side of the engine.

(2) If the rear seal contact area on the crankshaft

Use grease to hold shim in place until the flywheel

is grooved from excessive wear, the seal may be

housing is installed.

pressed into the flywheel housing 1/8 inch from its origi-

(4) Coat the lip of the crankshaft seal (28) lightly

nal position or install an oil seal sleeve as shown in fig-

with grease. Do not scratch or nick the sealing edge of

ure 3-104. An oversized seal is required when the oil

the seal.

seal sleeve is used.

(5) Use proper seal expander to aid in piloting the

(3) Reassemble the flywheel housing in reverse

seal on the crankshaft (fig. 3-105).

numerical sequence shown in figure 3-101.

(6) With the housing suitably supported, position

f. Installation.

it over the crankshaft and up against the cylinder

(1) Lubricate the gear train teeth with clean en-

block rear end plate (fig. 3-105).

gine oil.

(7) Install the screws, lockwashers and selflocking

screws in the same locations they were removed from.

Tighten finger tight.

(8) Using figure 3-106, A, tighten the capscrews

and self-locking screws snug in the sequence shown.

(9) Using figure 3-106, B, tighten the capscrews

in the sequence shown to the values listed in table 3-1.

Table 3-1. Flywheel Housing Screw Torque Data

Torque (lb-ft.)

Screw No. (fig. 3-106)

40-45

7 through 10

19-23

11 and 12

25-30

Remaining Screws

(10) Install the flywheel (para 3-32).

(11) Check flywheel housing concentricity with a

dual dial indicator on surfaces shown in figure 3-107.

Rotate the flywheel through one full revolution, tak-

ing readings at each 45 interval. Maximum total indi-

cator reading must not exceed 0.013 inch. If runout ex-

ceeds 0.013 inch remove flywheel housing and check

for dirt or foreign material (such as old gasket mate-

rial) between the flywheel housing and the rear end

plate.

3-69