Advertisement
4-24
TRANSMISSION
CLUTCH, TRANSMISSION, UNIVERSAL JOINT
(152)
c. Gear Shift Control Mechanism
Shifting into gear after selection has taken
place (see paragraph b. above)
,
or shifting out
of gear, is controlled by the shift control lever
on steering gear
column,
the control shaft in-
side the column, and the linkage which con-
nects the control shaft to the shift lever on
selector shaft in transmission. Forward move-
ment of control lever causes rotation of the
selector shaft to produce a shift into reverse or
second speed, depending on the selection. Rear-
ward movement of control lever similarly pro-
duces a shift into first or third speed. See
figure 4-31.
The housing in which the shift control lever
is mounted is a slip fit over the upper end of
the tubular control shaft, which encircles the
steering shaft. The control shaft is slotted in
two places to key to the lever housing, which is
held tight on shaft by a clamp screw. The
upper end of housing and shaft assembly is
supported in a metal and fabric bearing seated
in the signal switch housing. Upward thrust
of the assembly is taken by a fabric thrust
washer, plain washer, and spring washer placed
SCORED TEETH
~
A
.
1ST & REV.
SLIDING G
EAR
.•
/
SCORED
TEETH
between -t he lever housing and switch housing.
Downward thrust is taken by a fabric thrust
washer and a plain washer placed between
lever housing and a plate welded into the
column jacket. See figure 4-3l.
The lower end of control shaft is reduced in
diameter and is supported by a metal and
fabric bearing seated in the steering gear hous-
ing. An oil shedder is pressed into steering gear
housing over the bearing and the shedder is
covered by a cup welded to the control shaft,
to form a seal against entrance of dirt and
water.
A lever welded to control shaft is connected
by a short upper shift rod to the idler lever
mounted on a bracket attached to steering gear
housing. The idler lever is bushed and carried
on a shouldered pin attached to bracket by a
nut and washer. The pin is drilled and fitted
with a grease cup for
lubrication.
A long lower
shift rod, provided with an adjustable
clevis,
connects the idler lever to the shift lever on
selector shaft in transmission.Rubber insulators
seated in the levers prevent noise at the con-
nection with both ends of both shift rods. See
figure 4-31.
SCO RED
TE
ETH
Figure 4-32-Gear Teeth Damaged by Improper Gear Shifting
Advertisement
