Hudson 1948 - 1952, Service Manual

Page: 72 / 333

2. Remove flywheel and crankshaft oil thrower. See
"Flywheel Removal".
3. Remove oil pan and (oil pan baffle, 8 Cylinder).
4. Remove vibration dampener lock screw, lock and remove
vibration dampener using Puller J-676-C, Figure 31.
DO NOT HAMMER DAMPENER to remove.
5. Remove gear case cover and camshaft plunger (8
cylinder).
6. Using puller J-471, remove crankshaft gear, Figure 38.
NOTE: It is necessary to remove the camshaft gear and
timing chain on the 6 cylinder engine before crankshaft
gear can be removed.
7. Remove connecting rods and pistons.
8. Remove front and rear main bearing caps with Pull er
J-2955, remove balance of bearing caps.
9. Using a rope sling and chain fall, remove the crankshaft.
NOTE: Before replacing crankshaft, check condition of
crankshaft journals and pins, bearings, and bearing clear-
ances. Clean the oil pan and screen and blow out oil lines.
To Install, reverse procedure of removal, check the
information contained under "Main Bearings, Connecting
Rods, and Pistons; Remove and Replace Engine; Remove
an d Replace Clutch; Remove and Replace Timing Gears or
Timing Chain and Gears, Vibration Dampener Installation,
Flywheel Installation and Clutch and Transmission Installa-
tion."
NOTE: On 8 cylinder engines, before Installing the fly-
wheel to the crankshaft, check to make sure that lower
half oil retainer fits squarely and tightly against the upper
half retainer. Also make sure that gaskets are in good
condition
.
Screw holes in cap mounted oil retainer are elon-
gated to permit it to be squarely contacted with the
upper retainer. If contacting faces are nicked, Install
new retainer as a gap or other discontinuity of contact
will permit loss of oil.
VIBRATION DAMPENER
Regardless of the number of cylinders, the crankshaft of
a gasoline engine does not rotate at a uniform or constant
speed. This variation in the speed of rotation may be ac-
counted for chiefly by the intermittent power impulses .and
results in what is termed torsional vibration, a momentary
winding and unwinding of the crankshaft.
To eliminate this as far as is possible the vibration
dampener whose inner and outer members are separated by
rubber facings, is mounted at the front end of the crank-
shaft. Through the flexing of this disk the momentum of the
outer member of the vibration dampener opposes the accel-
erated and decelerated rotation of the crankshaft.
REMOVAL:
1. Remove the vibration dampener lock screw, lock.
2. Using Puller J-676C, Figure 34, remove vibration
dampener assembly.
NOTE: Do Not Hammer on dampener to remove.
FIGURE 34
NOTE: Should the dampener be disassembled to replace
the rubber facings be sure that the center punch marks
line up and that punch marks are opposite the key way in
hub in order to retain proper balance.
3 - 30 ENGINE