Exmark Turf Tracer Operator's Manual page 36

After adjusting the left hydro control linkage, move the speed control
lever to the mid-speed position and then back to the neutral position.
Recheck the left drive wheel rotation to see if further adjustment is
necessary - be sure the speed control lever is in the neutral position.
If inconsistent neutral occurs, check to be sure both springs are
properly tightened on the speed control lever under the console -
especially the rear pivot spring.
Repeat above adjustments if necessary.
3. Place the speed control lever in neutral. Adjust the right side linkage by
turning the quick track knob counter-clockwise until the tire begins to
rotate forward. Begin to retighten the knob clockwise about 1/4 turn at a
time, stopping to move the speed control forward and back to neutral.
Recheck the drive wheel rotation to see if further adjustment is necessary.
4. The spring that keeps tension on the knob should normally not need
adjustment. However, if adjustment is needed, adjust to where length
of spring is about 1" (2.5 cm) between washers. Adjust spring length by
turning nut at front of spring.
d) Drive Lever Linkage Adjustment
1. With rear of machine still on jack stands and engine running at full
throttle, move the speed control lever to the midway position. Move the
respective drive lever upward until it reaches the neutral position and
engage neutral lock latches. See Figure 11. If the tire rotates in either
direction, the length of the drive lever linkage will need to be adjusted.
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 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 rear of machine,
remove jack stands, and carefully lower machine to the ground.
2. Check the drive tire pressures and tire circumferences. See Section
4.1.13.
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.
FIGURE 11
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