Hudson 63 1936, Mechanical Procedure Manual

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FRAME AND SPRINGS
The frames are built-up of pressed steel sections incorporating
double drop side rails, double X bracing and box sections
formed in the side rails by extension of the X members.
The box section was used in the side rails from approximately
the front to the rear engine supports on 1934, 1935 and 1936
models. In the 1937 models, the section from approximately the
rear spring front hanger to the rear of the frame is also of box
section. To give further rigidity to the 1937 frame, the side rails
have been shaped to approximately follow the body floor plan
contours and all joints are welded.
Figure 1701 is a diagramatic sketch of a frame on which have
been indicated major measurements which will be helpful in
frame straightening.
All vertical measurements are taken from the bottom of the
central portion of the frame side rail. All measurements along or
across the frame are either parallel or perpendicular to the frame
center line and are taken at points on the outside of the frame
which can be readily reached from under the car.
When straightening a frame, diagonal measurements should
also be taken. Since diagonal measurements from similar points
on the right and left side should be equal no actual dimensions
have been given for this check.
The correct dimensions for the various frames are given in the
accompanying table.
Spring Mountings
The 1934 and 1935 models use forged brackets which were
riveted to the frame side rails to which the springs or spring
shackles are attached. The front spring front hanger is riveted
into the front end of the frame side rails, while the front spring
rear hanger and rear spring front hanger are mounted under the
frame side rail and riveted to the lower flange and the web. The
rear spring rear hanger is mounted under the frame side rail and
riveted to the lower flanges of the side rail and the cross member
located at this point.
The 1936 brackets are similar to those just described except
the front spring rear hanger is replaced by a threaded tube
welded through the frame box section to accept the shackle
bushing.
A similar tube has been welded into the frame side rails,
Figure 1702, to support the front spring front shackle and the
rear spring rear shackle on 1937 cars. The front spring rear
shackle and the rear spring front support bolts are carried in
brackets welded to the "X" members several inches inside the
frame side rails.
Removal of Springs (front or rear)
The axle (front or rear) should be supported on a roller
jack, while the chassis frame side rails should be supported on
stand jacks.
1. Remove spring U bolt nuts.
2. Disconnect lower end of shock absorbers.
3. Lower roller jack until axle is free of spring.
4. Unscrew frame bracket threaded bushing at front and
rear of spring and remove spring from under car.
Disassembly of Spring
5. Clamp spring in vise so that center bolt is just outside of
vise jaw.
6. Unscrew shackle threaded bushing.
7. Cut spring leaf clips and remove.
8. Remove center bolt nut and bolt. 9. Open vise and
disassemble spring.
Assembly of Spring
NOTE: The second leaf of the front springs of the 1936
and 1937 models, is made in two pieces. The outer end of
each piece is formed around the eye of the main leaf, while the
MECHANICAL PROCEDURE MANUAL
SECTION 17
Page 3
Figure 1702—Shackle Frame Bracket