Hudson 1948 - 1952, Service Manual

Page: 55 / 333

CAUTION: If the thread s in the cylinder block are cor-
roded or filled with dirt, an incorrect reading will be
indicated on the torque wrench as a large percentage of the
torque will be absorbed by the threads. ALWAYS
CLEAN OUT THREADS IN CYLINDER BLOCK BE-
FORE InstallING CYLINDER HEAD. Apply "Hudson
Perfect Seal Gasket Paste" to the threads of cap screw to
facilitate the tightening of the cap screw to the proper
tension.
MAIN BEARINGS
6 CYLINDER
REMOVAL:
Main bearing caps and shells can be removed from the 6
cylinder engine without removing the crankshaft.
1. Remove main bearing cap screws and remove No. 2 and
No. 3 main bearing caps.
2. Remove the two lower chain case cover screws and
washers at front of chain case.
3. Remove front and rear main bearing caps with Puller
J-2955, Figure 13.
CAUTION: DO NOT DAMAGE the engine timing gear
cover plate gasket when removing the front bearing cap.
FIGURE 13
3. Install Upper Bearing Shell Removing Tool KMO-734 in
oil hole of crankshaft and turning crankshaft in usual
rotation, the hinged head of the pin will engage the upper
half of the bearing and turn it out with the rotating action
of the crankshaft, Figure 14.
NOTE: Check main bearing oil seal for leaks and if it is
necessary to replace the seal, the crankshaft will have to
be removed. (See crankshaft removal, Page 27.)
FIGURE 14
Installation:
Recommended main bearing clearance is 0.0005" to
0.0015". These close clearances must be maintained when
fitting new bearings.
One method for checking bearing clearance is as follows:
1. Inspect the crankshaft for scoring, out of round and taper.
Crankshafts with journals that have more than .001"
taper or out-of-round, should be reground or replaced.
2. Install all bearings and bearing caps and tighten all
bearing cap screws to 75-lbs. torque.
NOTE: Wipe backs of bearings, bearing caps and crank
pins to remove any dirt and lint at the time each bearing
shell is Installed.
3. Rotate crankshaft by hand, if crankshaft can be turned by
hand one complete revolution; bearing to journal clear-
ance is at least .0005".
4. If crankshaft turns too freely, check for loose bearings
working one bearing at a time by placing a piece of brass
shim stock .002" thick, 1/2" wide and 1" long between
the bearing face and the crankshaft journal Figure 15.
FIGURE 15
ENGINE 3 - 13