1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

3 - 26 ENGINE
CONNECTING ROD
BOLT NUT LOCK
Tighten the regular connecting rod bolt nuts on both 6 and
8 cylinder to 40-45 foot pounds.
After properly tightening the bolt nuts, place the Palnut on
the bolt with the smooth face against the bolt nut, spin the
Palnut with the fingers until it is snug against the bolt nut.
Then tighten the Palnut 1/4 to 1/3 more to lock the Palnut.
Always use new Palnut's when reassembling rods.
CONNECTING ROD ALIGNMENT
PIN TO ROD ALIGNMENT:
(6 & 8 Cylinder)
Clamp the connecting rod on the arbor.
NOTE: It is necessary to remove the bearing shells on the
6 cylinder rod before clamping rod to arbor. ( Use Arbor
size 2.2505 ".)
Place the "V" block against either the piston or piston pin.
The amount of misalignment will be shown between the
pins on the "V" block and the face plate.
CONNECTING ROD BEND OR TWIST:
If the two top pins rest against the alignment fixture face
plate and the two bottom pins are away from the face plate,
it indicates the connecting rod is cocked or bent. This is also
true if the two bottom pins rest against the face plate and the
top pins are away from the plate. If the two horizontal pins
on the front side rest against the face plate and the two back
pins are away from the plate or vice-versa, it will indicate
that the rod is twisted.
CONNECTING ROD OFFSET:
(8 Cylinder ONLY)
1. Place "V" block on the piston pin so that the block rests
against the outside edge of the connecting rod (pin end)
and move the rod and "V" block toward the face plate
until all four pins of "V" block touch it.
Place the index pin (located at the bottom of the fixture)
so that it touches the connecting rod bearing end.
2. Remove the rod from the arbor and turn the rod around
and reassemble the rod to the arbor, placing the "V" block
on the piston pin in the same place as when checking the
opposite side.
3. Move the connecting rod and the "V" block toward the
face plate until either the index arm touches the bearing
at the lower end or the "V" block pins touch the face plate.
NOTE: If the index arm does not touch the rod bearing
with the four pins touching the face plate, check the
distance between the index arm and the rod bearing. This
should not exceed .025". If greater than this dimension,
rod should be straightened. If the index arm touches the
rod bearing and the four pins do not touch the face plate,
check the distance between the pins and the face plate.
This should not exceed .025". If this distance is greater,
straighten the rod until the pins of the "V" block touch
the face plate and the index arm is within .025" of touching
the rod bearing.
Use two Bending Bars HM 3-R, one to hold the rod and
the other to bend the rod into proper alignment.
ALIGNING ROD WITH PISTON
(6 & 8 Cylinder)
A quick check of a piston and connecting rod assembly
can be made for both twist and bend without disassembling
the piston from the connecting rod.
1. Mount the connecting rod and piston assembly on the
alignment fixture and set the piston in line with the
connecting rod, Figure 30.
2. Place the "V" block on the piston skirt and if both pins on
the block contact the face plate, then the rod is not
straight.
3. With the "V" block on the piston skirt and the pins
against the face plate, tip the piston first in one direction
and then in the other.