72
Maintenance Instructions
H37i
Adjustments
4. With the body lowered and the FSC in
NEU-
TRAL-PARK,
start the engine. With the en-
gine at normal operating speed, check for
movement of the drive wheels.
5. Lift the body to access the steering adjustment
components.
NOTE:
It may be necessary to tighten the
FSC friction adjustment if the transmissions
are moved out of neutral when the body is
raised. Refer to
Step 7 - Forward Speed
Control Friction Adjustment on page 73
for
location of the FSC friction adjustment nut.
6. Using a wrench on one tracking adjustment
nut, rotate the control rod
clockwise
just until
the wheel on that side begins
to move for-
ward.
Then, counting the turns required,
rotate the control rod
counterclockwise
just
until the wheel stops and then begins
to move
in reverse.
Rotate the control rod back clock-
wise half the number of turns required to make
the wheel go from moving forward to reverse.
The transmission is now centered in the neu-
tral window. Tighten the jam nut on the ball
joint and repeat the same procedure on the
other transmission.
7. Turn off the engine, and then lower the drive
tires onto the ground.
Step 4 -
Full Forward Speed Adjustment
1. Move the FSC to the full
FORWARD
speed
position.
2. Raise the body. The maximum speed tracking
adjustment set screw in both transmission
control arms should not be contacting the limit
stud on the transaxle. If they are, back the set
screws out until they do not touch.
T-Handle
Hex Wrench
Maximum
Speed Tracking
Adjustment
Transmission
Control Arm
Maximum Speed Tracking Adjustment
(Shown with Parts Removed for Clarity)
Step 5 -
Straight Tracking Adjustment
1. Sit in the seat, start the engine, set throttle at
full speed, and with the FSC in the
NEUTRAL-
PARK
position check for movement of either
drive wheel (if either wheel moves backward
or for ward, refer to
Step 3 - Neutral Function
Adjustment on page 71
and readjust).
2. Check for straight ground tracking on a level
surface (with hands off the steering levers).
Set the FSC at several different speeds and
observe if the machine moves in a straight line
(use cement joint or other line on ground for
reference).
3. If travel is not straight, shorten the control rod
on the slow side by turning the tracking adjust-
ment nut clockwise. If straight tracking and
neutral cannot be achieved, turn the tracking
adjustment nut counterclockwise until neutral
is restored.
4. Lengthen the control rod of the faster side by
turning the tracking adjustment nut counter-
clockwise to match the slower side while main-
taining the neutral position.
IMPORTANT:
After tracking adjustments are
complete, confirm that there is at least one (1)
thread visible on both control rods past the
tracking adjustment nuts.
5. If the machine is tracking straight throughout
the speed range except at maximum speed,
use the following adjustment procedure:
a.
With the engine off, place the FSC in full
FORWARD.
On the faster transmission,
loosen the jam nut and turn the maximum
speed tracking adjustment set screw in
until it just contacts the limit stud, and then
turn it in an additional 1/8 turn (turning the
set screw in slows the drive wheel).
b. Recheck maximum speed tracking, and if
necessary continue adjusting the set screw
in small increments until straight travel is
achieved.
c.
Tighten the jam nut.
Step 6 -
FSC Neutral Switch Adjustment
1. Place the FSC lever in the
NEUTRAL-PARK
position. Loosen the FSC neutral switch
mounting screws and adjust the neutral switch
up or down accordingly. Refer to
FSC Neutral
Switch Adjustment
illustration.