Exmark Viking Hydro 920000 - Manual (Page 36)

Maintenance
Tracking Adjustment
1. Stop engine and wait for all moving parts to stop.
2. Check the drive tire pressures and tire
circumferences as stated in Check the Tire
Pressures section in Maintenance.
3. Run the unit and observe the tracking on a level,
smooth, hard surface such as concrete or asphalt.
4. 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.
Hydro Pump Spring Tension
Setting
1. 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.
2. For a heavier drive setting, relocate the spring
anchor links to either the “medium” or “heavy
duty” positions as shown in Figure 25. 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.
Figure 25
1. Heavy duty 3. Standard
2. Medium duty 4. Retaining bolt
Park Brake Adjustment
1. Stop engine and wait for all moving parts to stop.
2. Disengage the park brake.
3. Remove the hairpin in the lower park brake
linkage. Turn the linkage in the yoke until there is
3/16 inch (.48 cm) to 1/4 inch (.64 cm) clearance
between the park brake tire bars and the tires with
the park brake disengaged. Re-install the hairpin.
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