Toro 30789, Operator'S Manual, Page: 32 / 41

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TRACTION DRIVE MAINTENANCE
7. Should front wheel continue to rotate, check for the
following:
A. Ball bearing is loose or worn out (Fig. 41).
B. Plunger on interlock switch is sticking.
C. Loose or missing fasteners.
D. Worn roll pin securing pump lever to
transmission.
E. Pump lever loose on control shaft. (Correct
by applying Loc–tite 271 or 601 to shaft.)
F. Weak or damaged leaf springs (Fig. 41).
Replace.
G. Internal transmission component malfunction.
Contact your local Toro distributor for assistance.
8. Shut engine off.
9. Adjust traction control rod; refer to Adjusting
Traction Control Rod.
ADJUSTING TRACTION INTERLOCK
SWITCH
1. Adjust transmission for neutral; refer to Adjusting
Traction Drive for Neutral.
2. Actuate the pump lever (Fig. 41) to insure all parts
are operating freely and seated properly.
3. Loosen jam nut. Rotate switch adjusting screw (Fig.
41) until there is a gap between head of screw and
switch button.
4. Rotate 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 1/2 turn. Tighten
jam nut.
PTO DRIVE MAINTENANCE
CORRECTING PTO DRIVE BELT
SLIPPAGE
If belt begins to slip because it has stretched or because
of worn linkage:
1. Unlatch and remove instrument cover.
2. Move PTO control lever to ON position.
3. Measure length of PTO spring between
flat–washers (Fig. 42). There should be a spring length
of 3-3/16 inches (81 mm).
4. To adjust, hold head of adjusting screw with wrench
(under PTO actuating arm) and turn locknut (Fig. 42).
5. Move PTO lever to OFF position and install
instrument cover.
1
2
3
Figure 42
1. 3-3/16 in. (81 mm)
2. PTO actuating arm
3. Locknut