Troubleshooting, Adjustment & Service
PARKING BRAKE ADJUSTMENT
1.Disengage the PTO, stop the engine, block the front wheels, remove the ignition key, and engage the parking brake.
2.Remove both control covers.
3.Locate the upper brake spring (A, Figure 22).
4.With the parking brake engaged, measure the com- pressed spring length. The spring should be 2” to 2- 1/8” (5.0 - 5.4cm) when compressed.
5.If the spring is not within this range, jack up the rear of the machine and secure with jackstands. Remove both drive tires.
6.Locate the lower brake spring, adjustment nuts and adjustment link (A, B & C, Figure 23).
7.Release the parking brake and turn the adjustment nuts to compress or release the upper spring. Lock the nuts against the adjustment link (C, Figure 23).
CAUTION
Do not adjust the spring to be shorter than 2” when compressed. This may damage the brake caliper.
If this adjustment does not correct a braking prob- lem, see your local Derby dealer.
SUSPENSION HEIGHT ADJUSTMENT
If the rider tilts either
Although this adjustment may not be necessary, it may be required if additional weight (ie. a grass catcher) is added to the frame or a drive tire is replaced.
To level the frame, loosen the jam nut (B, Figure 24) and turn turn the height adjustment bolt (A, Figure 24)
NOTE: Perform this adjustment on a hard, level surface such as a concrete floor. Making this adjustment will affect the mower cutting height. For fine cutting height adjustment, see your authorized dealer.
FRONT |
A |
Figure 22. Parking Brake Adjustment
A. Upper Brake Spring
A |
B |
C |
Figure 23. Parking Brake Adjustment
A.Lower Brake Spring
B.Adjustment Nuts
C.Adjustment Link
A |
B |
Figure 24. Suspension Height Adjustment
A.Height Adjustment Bolt
B.Jam Nut
22