Hydro Drive Linkage Adjustment

b)Adjust Neutral Control Linkages

1.Raise the rear of the machine up onto jack stands high enough to raise the drive wheels off of the ground.

2.Start the engine and move the throttle ahead to the full throttle position. Place the neutral lock latches in the “forward” position as shown in Figure 6 and move the speed control lever to the “mid-speed” position.

Note: The OPC levers must be held down whenever the speed control lever is out of the neutral position or the engine will kill.

3.Squeeze the respective drive lever until an increased resistance is felt, this is where neutral should be.

If the wheel turns while holding the drive lever in neutral, the neutral control linkages need to be adjusted. If wheels stop then go to step 7.

FIGURE 13

4.Loosen the nut against the neutral control linkage yoke as shown in Figure 13.

5.Adjust the neutral control linkage until the respective drive wheel stops when the lever is pulled against the neutral spring (neutral position). Turn the adjusting bolt approximately 1/4 turn clockwise if the wheel is turning in reverse or turn the bolt approximately 1/4 turn counter-clockwise if the wheel is turning forward. Release the drive lever to the forward drive position and squeeze back into the neutral position. Check to see if the wheel stops. If not, repeat the above adjustment procedure.

6.Make this adjustment on both sides.

7.After adjustments are made and the wheels stop when the drive levers are in the neutral position, tighten the nuts against the yokes.

c)Adjust Hydro Control Linkages:

1.Place the speed control lever in the “neutral” position.

Note: Neutral lock latches should still be “unlocked” and in the “forward” position.

This adjustment is again made with rear of machine on jack stands and engine running at full throttle. OPC levers will have to be held down whenever speed control lever is moved out of the neutral position.

2.Loosen the front nut on left hydro control linkage as shown in Figure

13.Turn the rear control linkage adjusting nut counter-clockwise until wheel rotates forward. Turn the rear nut of left control link clockwise 1/4 of a turn at a time, stopping to move the speed control forward and back to neutral, until left wheel stops rotating forward. Turn the rear nut an additional 1/2 turn and tighten the front nut making sure not to put a bind on the linkage. Make sure flat part of linkage is perpendicular to pin part of swivel. See Figure 14.

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