Hudson 1948 - 1952, Service Manual

Page: 66 / 333

The piston pin and connecting rod bushing should be
replaced when necessary by selecting the proper size pin to
fit the piston and reaming the connecting rod bushing to size.
NOTE: See "Connecting Rod Bushing Replacement" for
proper procedure.
Piston pins are furnished in standard, .002", .005", and
.010" oversizes.
Piston pins should be a hand push fit when piston is heated
to 200° F.
Heat the piston in boiling water or an electric furnace.
NEVER heat piston with a blow torch as this will distort the
piston.
After fitting pins to pistons, check piston pin in connecting
rod bushing. Ream bushing to .0003" larger than the pin
diameter.
Check the fit by holding the piston with the connecting rod
in a horizontal position . The rod should just turn on the pin
under its own weight.
PISTON PIN LOCK RINGS
The piston pin is retained in the piston by two snap rings
held in grooves at each end of the piston pin bore. This ring
can be removed with any suitable pliers.
CONNECTING ROD BUSHINGS
(6 & 8 Cylinder)
This piston pin bushing in the upper end of the connecting
rod is of bronze; burnished in place, and broach finished on
the 8 cylinder engine; and steel backed, bronze bushing,
burnished in place and diamond bored on the 6 cylinder
engine.
REPLACEMENT:
1. Press out old bushings by supporting the bushing end of
the connecting rod on Bushing Burnisher Block J-2950 for
6 cylinder and J-2951 for 8 cylinder. Remove the bushing.
2. Install new bushings, reverse procedure of removal using
the same tools required for removing.
3. After bushing has been pressed into the rod, using
Burnisher Block J-2950, 6 cylinder and ,T-2951, 8
cylinder and with J-2791 Burnisher and Broach 6 cylin-
der and J-2949 Burnisher 8 cylinder iron the bushing in
place in the rod, Figure 28.
NOTE: This operation swages or expands the bushing
into eye of the rod. This is important as the bushings
may work out of the rod if they have not been properly
burnished in place.
FIGURE 28
4. Remove the bearing cap of the connecting rod and Install
connecting rod on Aligning Fixture J-874-H arbor,
1.9375" 8 cylinder, 2.2505" -- 6 cylinder. (Tighten rod
on arbor and lock arbor in position with lock screw
located on side of alignment fixture).
5. Insert the reamer pilot in the upper hole in the alignment
fixture face plate and align bushing hole of rod with pilot
hole in face plate.
6. Insert reamer pilot bushing in upper hole in fixture and
lock lower arbor in place with locking handle.
7. Insert reamer through connecting rod bushing and into
pilot bushing, Figure 29.
8. Perform reaming operation to the following dimensions:
6 Cylinder -- .9685" to .9688"
8 Cylinder -- .7496" to .750"
3 - 24 ENGINE