S150X 21HP, 23HP, 25HP & 27HP - 48” & 52” Mower Deck
Return-To-Neutral & 
Neutral Adjustment
RETURN-TO-NEUTRAL ADJUSTMENT
To determine if it is necessary to adjust the neutral return, perform the following steps.
1.Disengage the PTO, engage the parking brake and turn off the engine.
2.Move the ground speed control levers into the operating position, pull levers rearward and release.
3.Move the ground speed control levers out towards the neutral position. If the levers do not align with the notches in the neutral lock plate, it is necessary to adjust the neutral return rod (B, Figure 30).
ADJUSTMENT
1.Lock the ground speed control lever in the neutral position.
2.Measure the length of the neutral return spring (C, Figure 30) it should be set at 3.25” (8,23cm). If the spring does not measure 3.25” (8,23cm) loosen the front set collar (D) and the rear set collar (A), then move the front set collar forward or back on the neutral return rod (B) until the spring length equals 3.25” (8,23cm). Retighten the front set collar.
3.Make sure that the neutral return bushing (E) is seated correctly in the spring stop plate (F).
4.Position the rear set collar so that it sets tightly against neutral return bushing and tighten.
5.Pull the ground speed control lever rearward and release to check position again. Adjust as necessary to align the ground speed control levers with the notches in the neutral lock plate.
It is important to note that after every adjustment of the neutral return rod, the lever must be pulled rearward and released to properly check the neutral position.
NEUTRAL ADJUSTMENT
D | 3.25” |
|
| (8,23cm) | E |
|
| |
B |
|
|
C | F |
|
|
| |
|
| A |
Figure 30. Neutral Return Spring Adjustment
A.Rear Set Collar
B.Neutral Return Rod
C.Neutral Return Spring
D.Front Set Collar
E.Neutral Return Bushing
F.Spring Stop Plate
A |
B |
If the tractor “creeps” while the ground speed control levers are locked in NEUTRAL, than it may be necessary to adjust the linkage rod.
NOTE: Perform this adjustment on a hard, level surface such as a concrete floor.
1.Disengage the PTO, engage the parking brake and turn off the engine.
2.There are three nuts (B, Figure 31) on the linkage rod. The first two are to be used together to turn the rod and the third (towards the front of the machine) is used to lock the rod in place. Loosen the jam nut that locks against the ball joint (B) and turn the linkage rod (A) to adjust. If the machine creeps forward, turn the rod CLOCKWISE (while standing at the rear of the machine, facing forward), if the machine creeps backward, turn the rod
3.Lock the jam nut (B) against the ball joint when neutral is achieved.
NOTE: This adjustment should not be performed while the machine is running. It may take several attempts to achieved neutral, depending upon how much the machine creeps.
Figure 31. Neutral Adjustment (RH side shown)
A.Adjustment Linkage Rod
B.Nuts
17 | TP |
