Walker B18, Руководство оператора

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64
Maintenance Instructions
ADJUSTMENTS
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.
Transmission
Control Arm
T-Handle
Hex Wrench
Maximum
Speed Tracking
Adjustment
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
po sition check for movement of either
drive wheel (if either wheel moves backward or
forward, re
fer to
Step 3 -
Neutral Position
Adjustment
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 ob serve
if the machine moves in a straight line (use
cement joint or other line on ground for refer-
ence).
3. If tracking is not straight, shorten the control rod
on the faster side by turning the tracking
adjustment nut clockwise. If straight tracking
and neutral are both achieved proceed to the
next step. If straight tracking and neutral cannot
both be achieved, turn the tracking adjustment
nut on the faster side counterclockwise until
neutral is restored. Then, lengthen the control
rod on the slower side by turning the tracking
adjustment nut counterclockwise until straight
tracking and neutral are both achieved.
IMPORTANT:
After tracking adjustments are
complete, confirm that there is at least one (1)
thread visible on both control rods past the track-
ing adjustment nuts.
4. 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 un-
til 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. Raise the body and adjust the switch
adjustment bolt up until it just makes contact
with the FSC switch plunger, and then turn the
switch adjustment bolt up an additional two (2)
turns and tighten the jam nut.
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 Fric-
tion Adjustment
later in this section for location
of the FSC friction adjustment nut.
FSC Switch
FSC Neutral Switch Location