1998 S/N 21329 - Walker Mowers

Maintenance Instructions
ADJUSTMENTS
Use the following procedures to check and adjust
clutch disengagement and brake action:
Stop Block Eccentric Adjustment - Step 1
Use the stop block attached to PTO belt tightener
arm to set the bottom position of the clutch idler pulley
in the disengaged position. The stop block
should contact the chassis to stop the clutch idler
pulley from moving further down in the disengaged
position. If the stop block is not contacting the
chassis in the disengaged position, it will be necessary
to loosen the brake band adjustment nut.
The stop block is an “eccentric” block that will allow
four adjustment positions from 5/16 in. (8 mm) to
11/16 in. (17 mm).
Stop
Block
Stop Block
Contacting Frame
Engage
Disengage
Pulley
Travel
1 in. to 1-1/2 in.
(25 mm to 38 mm)
Clutch Idler Pulley Travel Adjustment
11/16 in.
(17 mm)
9/16 in.
(14 mm)
Blade Brake Band Adjustment - Step 3
After the pulley travel is set, make the following adjustment
as needed:
7/16 in.
(11 mm)
5/16 in.
(8 mm)
PTO Belt Tightener Stop Block Adjustments
1. Adjust the blade brake band, using the adjustment
nut until there is a gap of approximately
1/8 in. (3 mm) between the PTO belt tightener
stop block and chassis. If there are not enough
threads on the brake band for adjustment,
lengthen the brake actuator rod.
Blade Brake Band
Adjustment Nut
Clutch Idler Pulley Travel Adjustment - Step 2
Adjust the stop block to give 1 in. (25 mm) to 1-1/2
in. (38 mm) pulley travel from “clutch engaged” to
“clutch disengaged”. To check and adjust the pulley
travel, first engage the clutch, then measure the distance
the pulley moves down as the clutch is disengaged
and the stop block contacts the frame.
Brake Actuator
Rod
NOTE: The importance of this adjustment is if the
pulley travel is excessive and the bolt develops too
much slack, the belt will derail when disengaged.
Blade Brake Band Adjustment
76