Hudson 63 1936, Mechanical Procedure Manual

Page: 164 / 333

MECHANICAL PROCEDURE MANUAL
SECTION 11
Page 25
The circuit from (12) on the selector switch will be to (2) and
(4) on the interlock switch and then to the central contact (W) of
the neutral switch. Since the transmission is in high gear (piston
forward) contact (Q) will close the circuit from the central
contact to solenoid No. 2 and the transmission will move to
neutral where the contact with the central contact (W) will be
broken, the cross shift will take place, turning the interlock
switch so that the circuit is from 2 to 1 to the selector switch (13)
and 16 to solenoid No. 1 and the shift will be completed to low
gear.
Had the transmission been in second gear when low was
selected, the contact (P) would have been closed with the central
contact (W) so that solenoid No. 1 would have been energized
bringing the transmission to neutral when the contact would
have opened and the shift made to low as before.
Mechanical Adjustment
All instructions on pages 10 and 11 of this group apply to the
later equipment except the paragraphs on page 11 under the
heading of Power Cylinder Piston Rod Adjustment.
The paragraphs on page 12 under the heading Main Contact
Plate do not apply to the later equipment while only the first
paragraph on the same page under the heading Transmission
Shifting Rail Lock applies.
Power Cylinder Piston Rod Adjustment
To check the adjustment, disconnect the wires of the lower
harness from terminals BL, W and B at the solenoid valve cover.
Attach the lower harness test lamp with the YB clip to the BL
wire, the W clip to the W wire and the Y clip to the B wire. (See
Figure 1 for wire color code.) Attach ground wire to chassis.
Put the selector in neutral, turn on ignition and depress clutch
(engine not running).
With the manual shift lever shift, move the transmission toward
high gear until the Y lamp of the test set lights. Now move the
lever toward second gear until the YB lamp lights. The move-
ment from neutral required to light the lamps should be the same.
Lengthening the piston rod will cause the YB lamp to light
with less movement while shortening will cause the Y lamp to
light with less movement of the shifting lever.
While adjusting the piston rod length the test lamps can be
used and the adjustment made so that the clevis pin can be
inserted with the transmission in neutral without either the Y or
YB lamps lighting.
An alternate method is to run the engine and hold the
clutch pedal down. With all wiring in place and the clevis
pin removed from the rod, the piston will be held in the
neutral position. The rod can then be adjusted so that the
clevis pin can be reinserted with the transmission in neutral.
Testing Equipment
The Electric Hand Testing Kit No. J-813 which
is available through the Hinckley-Myers Co., of Jackson,
Michigan, is adaptable to testing this equipment as well as
the previous type.
The lamps and clips of the lower harness test kit are
lettered to correspond to the original Electric Hand equip-
ment, however BL on the new equipment corresponds to
BY on the old as does B to Y while all other markings
remain the same.
Testing the Shifting Mechanism
1. Connect power unit test cable to the terminal on the
clutch circuit breaker to which the red wire is attached.
This wire should be hot only when the clutch is disen-
gaged. Remove the wires from the wire terminals at the
selector valve junction block.
2. With the engine running and the clutch disengaged
(rear wheels of car jacked up)—touch the (BL) post of the
junction block on the shifting unit with test prod. The
transmission should shift into high gear. Touch rear post
(B) and the transmission should shift to second gear.
3. To shift the transmission to neutral touch front post
(BK) with the test prod.
4. Now touch post (W) with the test prod and the cross
shift should be made. Still contacting (W), touch post (BL)
with second test prod. The transmission should shift into
low. Touch rear post (B), still contacting (W), and the shift
should be made to reverse.
If the shift is not made when one of the posts is contacted,
connect an accurate ammeter to the hot wire and to the
terminal. A current draw of approximately 2.5 amperes
indicates that the solenoid is 0. K. A higher amperage
indicates a short and a low amperage an open circuit.
CAUTION: A dead short circuit in a solenoid will burn out
ammeter if permanent connection is made.
If the current draw is correct, the trouble may be due to
the valve plunger sticking in its upward position, dirt under
the valve, a vacuum leakage in the lines or units or a
mechanical drag in the mechanism.
Disconnect the shifting cylinder piston rod from the the
shifting lever or the diaphragm cylinder from the
cross