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WALKER MANUFACTURING COMPANY
July 2006
SERVICE INSTRUCTIONS
Blade Brake - Model MS
The mower blade drive (and blower on GHS models) is
equipped with a brake system to stop blades within five
(5) seconds after disengaging the clutch. A belt scrub-
ber brake acting on the PTO drive belt provides braking
action. The brake action is adjusted by springing or
bending the scrubber mount on GHS models and
bending the scrubber on SD models. If the brake sys-
tem malfunctions - blades do not stop within five (5)
seconds - adjust or repair the brake as follows:
Braking Action Adjustment
Scrubber Brake Adjustment - GHS
Scrubber Brake Adjustment - SD
Use “trial and error” to adjust scrubber braking action
and achieve a stopping time of approximately 4 to 5
seconds after disengaging clutch with full throttle. Do
not exceed five (5) seconds. Avoid having the brake
stop too quickly, as this will reduce PTO drive belt life
(burns belt).
Also check for alignment of the brake bar (scrubber) on
the belt and make sure bar is only contacting the
back of belt and not the edges of the pulley(s). For
GHS models, it may be necessary to spring the brake
mount bar to shift (align) the brake bar on the belt; like-
wise, the scrubber on SD models is bent for alignment
with the belt.
WARNING
It is important to check and maintain
blade brake action for safe operation of
the machine.
Desired Brake
Action
GHS Model
Direction of
Mount Bend
SD Model
Direction of
Scrubber Bend
Stronger (Quicker) Bend Down Bend Up
Weaker (Slower) Bend Up Bend Down
Brake Mount Bar
Scrubber Brake Bar
Contacting Belt
Quicker
Slower
Scrubber Brake Bar
Contacting Belt
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