Hudson 63 1936, Mechanical Procedure Manual

Page: 125 / 333

SECTION 9
Page 8
MECHANICAL PROCEDURE MANUAL
ISSUED MAY, 1937 Printed in U. S. A.
5A.-6A. Centering Piston Travel in Cylinder
(Power units with piston rod cable—Figure 902)
Depress accelerator pedal and pull piston back to limit. Adjust
clevis on cable (G) until clearance between center of clevis pin
(I) and back of slot in clevis is from 7/8" to 15/16". This
adjustment also gives the correct piston rod position for the
cushion point.
In this construction the rod (K) is not adjustable, however 4
holes are provided in lever (J) to vary the clutch pressure plate
movement in respect to the piston movement. The hole marked
1 gives the least movement of the plate while the other holes in
order numbered give increased plate movement.
The hole numbered 2 is correct for most purposes, however if
the clutch is not completely disengaged or tends to drag, :he rod
(K) should be moved to hole 3 or 4. This change is usually
required only after considerable wear of the clutch facing has
occurred.
This adjustment of the cable length as given is approximately
correct and can be finally adjusted if necessary as described in
Paragraph 9.
7. Throttle Rod Adjustment
With the engine warm and running smoothly at idle speed and
clutch disengaged by the automatic control, pull back on the
throttle rod (B) (Figures 902 and 904) just until the piston rod
(G) begins to move backward. While holding the rod (B) in this
position, turn the clevis on its front end until the clevis pin can
just be inserted through the clevis and the extreme rear of the
slot in the throttle lever (A). After the clevis pin is inserted, any
additional backward movement of the rod (B) after the piston
rod (G) begins to move backward, should begin to open the
throttle and increase the engine speed.
8. Cushion Valve Adjustment
Before attempting any adjustment to the cushion valve, the
fitting should be removed from the right side of the valve
housing ( Figure 906) and the position of the plunger (W)
checked. When the pendulum is at its extreme forward posi-
tion, the reduced section of the plunger (W) should be exactly
in line with the port in the housing as shown at T.
The stop (V) (Figure 906) was introduced during 1937 and
is so located that the rubber washer on the bottom of the
pendulum strikes against it. Where the stop (V) is used, the
position of the plunger (W) can be changed by springing the
pendulum arm slightly.
Prior to the use of the stop (V), a stop screw (U) was used.
This permits adjustment for the correct position of plunger
(W).
The first 1937 cushion control valves and those of previous
models had no stop. The screw type stop can be provided by
drilling and tapping the boss on the rear of the cushion control
valve pendulum housing just below the mounting screw boss.
This boss should be drilled through and tapped with a 10-32
thread. A 10-32 x 1-1/2" round head machine screw with a
lock nut under the head is then screwed in to provide a stop.
With the extreme forward position of the plunger (W)
properly determined and the plunger working freely, remove
the spring (R) and stretch it to a free length of 1-5/8". Replace
Figure 905
Figure 906