Flywheel Housing - TM-10-3930-242-340094

TM 10-3930-242-34

tact face. Maximum allowable runout is 0.005

(1) After removal, dean flywheel housing,

t h o r o u g h l y , using solvent P-D-680, or equal.

i n c h total indicator reading.

( 2 ) It is very important that all old gasket

(5) Install the engine (para 2-5).

m a t e r i a l be thoroughly removed from flywheel

3-22. Flywheel Housing

h o u s i n g and end plate, otherwise, run out of

pilot aid face of housing may be affected when

a. General. A combination flywheel housing

h o u s i n g is installed on engine.

a n d gear train cover is attached to the rear cy-

( 3 ) Inspect the crankshaft rear oil seal.

l i n d e r block end plate and houses the flywheel

d. Installation.

a n d gear train.

b. Removal. The flywheel housing may be re-

NOTE

moved from the engine by two different

Lubricate the gear train teeth before installing

m e t h o d s ; either by mounting the engine on the

flywheel housing.

o v e r h a u l stand, or by removing the oil pan, oil

(1) Affix a new housing-to-end plate gasket

p u m p inlet pipe and screen and supporting the

to the rear face of end plate.

engine on wood blocks or a steel frame.

( 2 ) Apply a light coat of high temperature

(1) Remove the engine (para 2-5).

cup grease to lip of crankshaft rear oil seal. Do

(2) Remove the oil pan (para 3-24).

n o t use hypoid gear lubricants.

(3) Remove the flywheel as outlined in

( 3 ) To pi l o t th e s e a l ont o t h e crankshaf t

paragraph 3-21.

successfully, use an oil seal expander tool on the

( 4 ) Remove

the

(TM

fuel

pump

e n d of crankshaft. Also thread two aligning

10-3930-242-12).

s t u d s into cylinder block, to guide the housing

(5) Remove the engine driven hydraulic

into place.

pump (TM 10-3930-242-12).

( 4 ) With housing suitably supported, posi-

(6) Remove the limiting speed governor

tion housing over crankshaft and up against cy-

(para 3-7).

l i n d e r block rear end plate and gasket.

( 7 ) Remove the fuel and hydraulic pump

( 5 ) Install the flywheel housing attaching

drive (TM 10-3930-242-12).

b o l t - s , lockwashers, and copper washers in re-

the

breather

(TM

( 8 ) Remove

v e r s e sequence from which they were removed,

10-3930-242-12).

fingertight only.

(9) Remove the two outside blower drive

( 6 ) For the sequence of initial tightening,

and flywheel housing

support-to-end-plate

refer to figure 3-46. Starting at No. 1, draw all of

b o l t s , lockwasher and plain washer.

t h e housing bolts up snug.

NOTE

( 7 ) For the final tightening sequence, refer

When removing the flywheel housing bolts, note

t o figure 3-47. Starting at No. 1, tighten all of

the location of the various size bolts, lockwashers,

t h e housing bolts to their specified torque. The

and copper washers, so they may be reinstalled in

5/16inch-18 and 3/8 inch-16 idler gear hub and

their proper location at reassembly.

s p a c e r bolts should be tightened to 19-23 and

(10) Remove the bolts and lockwashers in-

4 0 - 4 5 foot-pounds torque. Tighten all the re-

side of flywheel housing (flywheel cavity), which

m a i n i n g 3/8 inch-16 bolts to 30-35 foot-pounds

a t t a c h the housing to end plate and cylinder

torque, and the 3/8 inch-24 bolts to 35-40 foot-

b l o c k . Remove the remaining bolts around the

pounds torque.

upper portion of housing also, the bolts which go

(8) Install the breather (TM 10-3930-

t h r o u g h the rear end plate from the front and

242-12).

t h r e a d into the housing,

(9) Install the two outside blower drive

( 1 1 ) Thread eye bolts into tapped holes in

s u p p o r t to flywheel housing bolts, lockwashers,

pads on top or sides of flywheel housing. Attach

a n d plain washers. Tighten bolts to 30-35 foot-

a chain hoist with suitable sling to eyebolts,

pounds torque.

t h e n strike the front face of housing alternately

NOTE

o n each side of engine with a soft hammer to

loosen and work it off dowel pins. Lift the hous-

A long bolt or stud threaded into one of the tapped

holes in the end of the crankshaft IS NOT a suita-

ing away from cylinder block rear end plate.

ble support for the dial indicator and use of such a

(12) Remove all traces of old gasket mater-

s u p p o r t probably will result in inaccurate read-

i a l from the cylinder block rear end plate and

ings

h o u s i n g . Do not scratch gasket flange surface.

c. Cleaning and Inspection.

( 1 0 ) Using a dial indicator, check flywheel

3-54