Traction Control Neutral Adjustment - Toro Groundsmaster 300 Series Service Manual

Traction Control Neutral Adjustment (Fig. 13)
1. Park vehicle on a level surface and turn engine off.
Apply the parking brake, tip seat forward, and actuate
pump lever (Fig. 13) to ensure assembly is properly
seated and operating freely. Correct any discrepancy.
2. Jack up frame so left front wheel is off the ground. On
four wheel drive machines, jack up frame so at least one
rear wheel is also off the ground. Use jack stands to sup-
port the raised machine.
3. Block wheels that are on the ground so vehicle cannot
roll forward or backward.
4. Start engine and allow it to idle for 5 minutes to heat
oil in transmission to operating temperatures.
5. Release parking brake; then check that wheel(s) that
are off the ground are NOT rotating. Check for wheel
rotation with throttle in both SLOW and FAST position.
If wheel(s) that are off the ground are NOT rotating, pro-
ceed to step 8 as no adjustment is necessary.
6. If the wheel(s) that are off the ground ARE rotating,
the pump plate must be adjusted as follows:
A. Move throttle to SLOW.
B. Loosen three (3) capscrews that secure pump
plate to transmission.
C. If wheel is rotating forward, lightly tap bottom of
pump plate counterclockwise. By contrast, tap pump
plate clockwise if wheel is rotating backward. When
wheel stops rotating, tighten capscrews to secure
pump plate.
D. Check that wheel(s) that are off the ground are
NOT rotating with throttle in both SLOW and FAST
position. If necessary, repeat pump plate adjustment
until wheels do not rotate.
7. Should wheel(s) that are off the ground continue to ro-
tate after adjustment procedure, check for the following:
A. Ball bearing is loose or worn.
B. Plunger on interlock switch is sticking.
C. Fasteners on pump control assembly are loose or
missing.
Adjustments
D. Weak or damaged leaf springs.
E. Pump lever loose on transmission control shaft.
Make sure that fasteners are tight (bolts or spring pin).
If necessary, remove pump lever from control shaft,
apply Loctite #680 (or equivalent) to shaft and reat-
tach pump lever.
F. Internal transmission component malfunction (see
Repairs section of this chapter).
8. Shut engine off.
9. Adjust traction control rod; refer to Traction Control
Rod Adjustment in this section.
10. Check operation of neutral switch and adjust if nec-
essary.
SWITCH
ADJUSTING
SCREW
BALL
BEARING
LEAF
SPRINGS
PUMP
LEVER
Page 5 - - 24
Rev. I
CAPSCREW
PUMP
PLATE
Figure 13
Groundsmaster 300 Series