Simplicity ZT4000 Series - Manual (Page 35)

33
Regular Maintenance
Figure 35. Parking Brake Adjustment
A. Brake Spring
B. Adjustment Nut
A
B
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 35).
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
8 3/8”
(21,2 cm)
Figure 36. Hydraulic Pump Drive Belt Replacement
A. Pump Drive Belt
B. Crankshaft Pulley
C. Pump Pulley
D. Idler Pulley
E. Idler
Arm
F. Spring
G. Spring Anchor Hook
B
D
A
C
C
F G
E
Hydraulic Pump Drive Belt Replacement
1. Park the tractor on a smooth, level surface such as a
concrete floor. Disengage the PTO, engage the parking
brake, turn off the engine, and remove the ignition key.
2. Remove the PTO drive belt (see MOWER BELT
REPLACEMENT for removal instructions).
3. Remove the hardware that secures the clutch anchor
pad to the PTO clutch.
4. Loosen the nut towards the front of the machine on
the spring anchor hook (G, Figure 36) to release the
majority of the belt tension. Use caution and remove the
nut to completely release the tension.
5. Remove the old belts and replace it with the new ones.
Make sure the V-side of the belt runs in the grooves of
the crankshaft pulley and pump pulleys (B & C).
6. Reinstall the anchor hook (G) into the anchor tab and
loosely fasten the nut. Adjust the anchor hook until a
measurement of 8-3/8” (21,2 cm) is achieved from the
outside if the spring hooks. Tighten nut.
7. Reinstall the clutch anchor pad to the PTO clutch and
secure with the hardware previously removed.
8. Reinstall the PTO drive belt.
NOTICE
Do NOT adjust the spring shorter than
1-15/16” (4,9 cm) when compressed. This may damage
the brake mechanism.