Return-To-Neutral Adjustment; Parking Brake Adjustment - Simplicity ZT4000 Series Manual

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.
To Adjust:
1. Lock the ground speed control lever in the neutral
position.
2. Measure the length of the neutral return spring (C,
Figure 28) 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.
3.25"
(8.23cm)
D
C
Figure 28. 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
E
F
A B
ZT4000 - 44" & 48" Mower Deck

Parking Brake Adjustment

1. Disengage the PTO, engage the parking brake, stop the
engine and remove the ignition key.
2. Raise the seat plate.
3. Locate the brake spring (A, Figure 29).
4. With the parking brake engaged, measure the
compressed spring length. The spring should be
1-15/16" - 2" (4,9 - 5,1 cm) when compressed.
5. If the spring is not within this range, release the parking
brake and turn the adjustment nut (B) to compress or
relax the spring.
6. Engage the parking brake and remeasure the spring
NOTICE
Do NOT adjust the spring shorter than 1-15/16"
(4,9 cm) when compressed. This may damage the brake
mechanism.
B
A
Figure 29. Parking Brake Adjustment
A. Brake Spring
B. Adjustment Nut
15