Adjusting The Traction Interlock Switch - Toro Groundsmaster 328-D 30630 Operator's Manual

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Figure 37
1. Switch adjusting screw
2. Jam nut
3. Ball bearing
4. Leaf springs
5. Pump lever
6. Capscrews
7. Pump plate
7. Block the right front tire and both rear tires so the
vehicle cannot roll forward or backward.
8. Jack up the frame so the left front wheel is off the
shop floor. Use a jack stand to support the frame.
9. Start the engine and allow it to idle for 5 minutes
to heat the transmission oil to operating
temperature.
10. Release the parking brake; then check the left
front wheel that is off the floor. The wheel must
not be rotating. If the wheel is rotating, go to
step 11 for an adjustment. If wheel is not
rotating, go to step 13. Verify the adjustment
with the throttle in the SLOW and FAST
position.
11. Because the wheel is rotating, the pump plate
must be adjusted. But before adjusting the pump
plate, move the throttle to SLOW. If the wheel is
rotating forward, loosen the capscrews, and
lightly tap the bottom of the pump plate
counterclockwise (Fig. 37). By contrast, tap the
pump plate clockwise if the wheel is rotating
backward (Fig. 37). When wheel stops rotating,
tighten the capscrews holding the pump plate
against the side of the transmission. Verify the
adjustment with the throttle in the SLOW and
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FAST position.
12. If the front wheel continues to rotate, check for
the following:
• Loose or worn out ball bearing(Fig. 37).
• The plunger on the interlock switch is
sticking.
• Loose or missing fasteners
• Worn roll pin securing the pump lever to the
transmission
• The pump lever is loose on the control shaft.
(Correct by applying Loc-tite 271 or 601 to
shaft.)
• Weak or damaged leaf springs (Fig. 37).
Replace.
• Internal transmission component
malfunction. Contact your local Toro
distributor for assistance.
13. Shut off the engine.
14. Adjust the traction control rod; refer to Adjusting
the Traction Control Rod, page 29
Adjusting the Traction Interlock
Switch
1. Adjust the transmission for neutral; refer to
Adjusting the Traction Drive for Neutral, page
30.
2. Actuate the pump lever (Fig. 37) to ensure all
parts are operating freely and seated properly.
3. Loosen the jam nut. Rotate the switch adjusting
screw (Fig. 37) until there is a gap between the
head of the screw and the switch button.
4. Rotate the adjusting screw until it contacts the
switch button. Continue to rotate the screw until
the circuit is completed (switch " clicks"). After
the switch clicks, rotate the adjusting screw an
additional 1 ⁄ turn. Tighten the jam nut.
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