| Tweet |
Custom Search
|
|
|
||
 (4) Move the upper end of lifting tool about to
NOTE
assist in loosening flywheel from shaft, then withdraw flywheel
Be sure bolts are accurately tightened.
from crankshaft and flywheel housing.
Never exceed the specified torque. And.
c. Cleaning, Inspection, and Repair.
never apply compound between two
(1) Wash flywheel with clean fuel oil and blow dry
surfaces, where maximum friction is
with compressed air.
required, such as between crankshaft and
(2) Inspect
flywheel
face
for
scoring,
flywheel.
overheating discoloration, or cracks. Replace a defective
flywheel.
(6) Mount a dial indicator on the flywheel housing
(3) Inspect the ring gear for excessive wear or
and check runout at flange face. Maximum allowable runout
damaged teeth. If ring gear is defective, replace it as
is 0.001 inch per inch of radius of flange.
described in d. below.
f. Flywheel Housing. The flywheel housing is a one
d. Ring Gear Replacement.
piece casting mounted against the rear end plate which is
attached to the cylinder block, thus providing a cover for the
NOTE
gear train and flywheel. The flywheel housing is counterbored
Make note of chamfered teeth so that the
for a lip type oil seal that contacts the crankshaft (para 5-8 b.).
replacement ring will be installed with
The housing will require little servicing, other than
chamfer facing the same direction.
replacement of the oil seal. It will be necessary to remove the
housing for this and certain other maintenance operations.
(1) Support the flywheel (crankshaft side down)
(1) To remove the flywheel housing, proceed as
on a solid flat surface of hardwood block, which must be
follows:
slightly smaller than the inside diameter of the ring gear.
(a) Disconnect the power generator (para
(2) Use a suitable drift and hammer to drive ring
gear off the flywheel. Work around the circumference to avoid
(b) Remove any accessories attached to
binding gear on the flywheel.
the flywheel housing (para 5-2), and drain the lubrication
(3) Install new ring gear on flywheel as follows:
system.
(a)Support the flywheel, ring gear side up, on a solid flat
surface.
NOTE
Slide engine away from power generator at
CAUTION
least 1/2 inch to clear dowel pin on
generator housing.
Do not, under any circumstances, heat the
gear over 400 ., for excessive heating
F
(c) Position a hoisting device over the
may destroy the original heat treatment.
engine, place hooks in lifting brackets, remove engine
mounting bolts (fig. 5-7), then lift engine high enough to
(b) Rest the ring gear on a flat metal
remove the oil pan.
surface, with chamfer facing proper direction, then heat the
(d) Remove capscrews securing oil pan to
ring gear uniformly with an acetylene torch, keeping the torch
cylinder block, then remove the oil pan.
moving around the gear to avoid hot spots.
(e) Position blocks under engine (keep
(c) Use a pair of tongs to lift the ring gear
housing free), lower engine to rest on blocks but keep hoist
into position of flywheel. Recheck chamfer direction.
tight at front lifting bracket.
(d) Tap the heated gear into place against
(f) Remove two bolts securing rear lifter
the shoulder on the flywheel. If the gear can not be tapped
bracket (mounted on housing) to the cylinder head. This will
into position readily, remove it and apply additional heat.
leave bracket attached to flywheel housing for ease in
Heed caution above about overheating.
handling.
e. Installation.
(g) Remove the flywheel (b. above).
(1) Check the extension of the dowel pins from
(h) Remove the twelve capscrews inside
the end of the crankshaft. They must not extend over 0.500
the housing cavity which attach the housing to the idler gear
inch beyond end.
hub, spacer, and cylinder block.
Remove the twelve
(2) Attach lifting device, as in removal above,
remaining capscrews around the upper portion of the housing,
then hoist flywheel into position on dowel pins of the
and, the two capscrews that enter from front end plate and
crankshaft, with bolt holes aligned.
thread into the housing.
(3) Remove flywheel lifting tool.
(i) With the flywheel housing supported by
(4) Position drive flange up against flywheel with
a hoist attached to the lifter bracket, use a soft hammer and
holes in alignment.
strike the housing on alternate sides to work off the dowel pins
(5) Apply a small quantity of international
and away from the rear end plate, then move housing away
compound no. 2 (or equivalent) to the threads and contact
from engine.
area of the six attaching bolts. Install and tighten the bolts to
a torque of 150-160 ft. lbs.
5-28
|
||
|
||
