Service Manual

HYDRAULIC DRIVE SYSTEMS
5 - 12 Mid-Size Walk Behind Service Manual
4. Hold OPC levers down.
Note: The OPC levers must be held down whenever
the speed control lever is out of the neutral position or
the engine will kill.
5. Squeeze one drive lever until an increased
resistance is felt. This is where neutral should be.
Note: Make sure you have not reached the end of the
neutral lock slot. If you have, shorten the control lever
linkage. Refer to "Control Rod Adjustment (Pistol Grip
Floating Deck)" on page 5 - 14.
6. If the wheel turns while holding the drive lever in
neutral, the neutral control linkages need to be
adjusted (Figure 88). If wheel stops, then go to
step 12.
7. Loosen the nut against the neutral control linkage
yoke (Figure 88).
8. Adjust the neutral control linkage until the
respective drive wheel stops while the drive lever
is pulled against the neutral spring (neutral
position) (Figure 88).
9. Turn the adjusting bolt approximately 1/4 turn
clockwise if the wheel is turning in reverse or turn
the bolt approximately 1/4 turn counterclockwise if
the wheel is turning forward (Figure 88).
10. 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.
11. After adjustments are made, tighten the nuts
against the yokes.
12. Repeat this procedure for the opposite side.
Figure 88
m-5394-2
Hydro Control Linkage Adjustment
(Pistol Grip Floating Deck)
Left Side Linkage Adjustment
1. Raise the rear of the machine and place on jack
stands.
WARNING
Electrical system will not perform proper safety
shut off with Operator Presence Control (OPC)
levers held in place.
• Make sure Operator Presence Control (OPC)
levers are working when adjustment is
completed.
• Never operate this unit with Operator Presence
Control (OPC) levers held in place.
(1) Neutral control linkage
(2) Yoke
(3) Adjusting bolt
(4) Nut
WARNING
Engine must be running so control linkage
adjustments can be performed. Contact with
moving parts or hot surfaces may cause personal
injury.
Keep hands, feet, face, clothing and other body
parts away from rotating parts, muffler and other
hot surfaces.
WARNING
Mechanical or hydraulic jacks may fail to support
machine and cause a serious injury.
• Use jack stand when supporting machine.
• Do not use hydraulic jacks.