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WALKER MANUFACTURING COMPANY
July 2006
SERVICE INSTRUCTIONS
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 disen-
gaged position, it will be necessary to loosen the
brake band adjustment nut. The stop block is an “ec-
centric” block that will allow four adjustment positions
from 5/16 in. (8 mm) to 11/16 in. (17 mm).
PTO Belt Tightener Stop Block Adjustments
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.
NOTE: The importance of this adjustment is if the pul-
ley travel is excessive and the belt develops too much
slack, the belt will derail when disengaged.
Clutch Idler Pulley Travel Adjustment
Blade Brake Band Adjustment - Step 3
After the pulley travel is set, make the following adjust-
ment as needed:
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
11/16 in.
(17 mm)
9/16 in.
(14 mm)
7/16 in.
(11 mm)
5/16 in.
(8 mm)
Engage
Disengage
Pulley
Travel
1 in. to 1-1/2 in.
(25 mm to 38 mm)
Stop Block
Contacting Frame
Stop
Block
Brake Actuator
Rod
Blade Brake Band
Adjustment Nut
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