Toro TimeCutter SW4200 Service Manual page 69

HYDROSTATIC DRIVE SYSTEM
5. Accelerate the engine to full RPM. Observe the
rear tire's forward or reverse movement. If the
tire is creeping in forward or reverse, a neutral
adjustment is needed. Make sure the traction
pedal is in the neutral position.
6. When in neutral, the stud should be in the center
of the slot in the control arm (A).
7. If one wheel is creeping, set the neutral on
BOTH drives. Set both wheels so they are
slightly rotating forward. Turn the adjustment
nut (B) clockwise or counter-clockwise until
creeping stops. Then turn it another 1/4 turn in
the same direction.
B
5
8. When neutral is achieved, have the person
sitting in the seat push the traction lever full
forward. Count the number of revolutions of the
tire pera specified amount of time (example: 10
seconds). Record the number of revolutions.
Repeat for opposite side.
5-4
A
9. Compare the number of revolutions for each tire.
If they are within 2-3 RPM of each other, the
tracking is set correctly. If they are not within
that spec, slow down the faster hydro by turning
the adjustment nut counter-clockwise 1/4 turn
and retest. Continue to adjust the hydro this
way until the revolutions are with the spec.
10. Turn the engine OFF.
11. Safely lower unit.
12. If the unit is set correctly it should drive straight
on level ground with the wheels going straight
forward and WITHOUT having to "steer" the unit
straight.
Toro TimeCutter SW/SWX Service Manual