Exmark Viking Hydro Operator's Manual page 38

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5.2.11 Hydro Pump Spring Tension Setting:
5.2.12
2. Adjust the linkage length by loosening the jam nuts at both ends of the
linkage and rotating the linkage in the ball joints. Lengthen the linkage
if the tire is turning in reverse and shorten the linkage if the tire is
creeping forward. Tighten the jam nuts at both ends. Release and re-
engage the neutral lock latch checking that the tire stops. Continue this
process until the tire is at a dead stop.
DRIVE LEVER AND LATCH IN NEUTRAL POSITION
3. Make this adjustment for both sides.
e) Tracking Adjustment
1. Stop engine and wait for all moving parts to stop. Raise the rear of the
machine, remove jack stands and carefully lower the machine to the
ground. (Check the drive tire pressure and tire circumference. See
5.1.11.)
2. Run the unit and observe the tracking on a level, smooth, hard surface
such as concrete or asphalt.
3. If the unit tracks to one side or the other, turn the quick track knob.
Turn the knob right to "steer" right; turn the knob left to "steer" left.
a) For medium or heavy duty drive conditions such as operation with a sulky
on steep slopes, a higher spring force may be required on the hydro pump
control arms to prevent the drive system from stalling.
b) For a heavier drive setting, relocate the spring anchor links to either the
"medium" or "heavy duty" positions as shown in Figure 21. The spring
anchor links are attached to the upper rear corner of the hydro drive shields
on the left and right hand sides of the machine.
Note: In the "medium" or "heavy duty" positions, the drive lever forces at
the upper handle will also be increased.
HYDRO PUMP SPRING TENSION SETTING
Park Brake Adjustment:
a) Shut off engine and wait for all moving parts to stop.
b) Disengage the park brake.
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FIGURE 20
FIGURE 21
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