Page: 4-52
WALKER MANUFACTURING COMPANY
July 2006
SERVICE INSTRUCTIONS
Clutch Linkage Adjustment - Engaged
Clutch Disengagement/Brake Action
The
declutched or disengaged
position of the blade
clutch idler pulley is adjustable and is set to give belt re-
lease
without excessive slack
and to apply the blade
brake. The blade brake is activated by linkage to the
clutch idler pulley mechanism. The brake is designed
to stop the blades within five (5) seconds after disen-
gaging the clutch.
Use the following procedure to check and adjust clutch
disengagement and brake action:
1.
Use the adjustment nut on the brake band (refer
to
PTO Clutch Disengagement Adjustment
il-
lustration) to set the position of the clutch idler
pulley in the
declutched
position. Adjust the de-
clutched pulley position to give
1/2 in. (13 mm)
pulley travel
from “clutch engaged” to “clutch dis-
engaged.” To check and adjust the pulley travel,
first engage the clutch, then measure the dis-
tance the pulley moves down as the clutch is dis-
engaged.
2.
After the pulley travel is set,
check blade brake
action as described in
CHECKING/SERVICING
the
Blade Brake Action
in the
Maintenance In-
structions Section.
If the brake does not stop the
blades within five (5) seconds, check the following:
a.
Check clearance between the clutch idler pul-
ley and the motor mount when the pulley is in
the declutched position. If there is no clear-
ance and the idler pulley rests on the frame,
the blade brake will not be applied when the
clutch is disengaged. Normally, this problem
would be caused by a short engine PTO drive
belt. Change the belt (refer to
REPLACING/
REPAIRING
the
Drive Belts
in this section),
and readjust pulley travel as described by
step 1.
PTO Clutch Disengagement Adjustment
b.
Check both the brake band and brake drum
on the drive pulley for wear. Replace worn
brake parts and readjust pulley travel as
described by step 1 (above).
WARNING
It is important to check and maintain
blade brake action for safe operation of
the machine.
1/4 to 3/8 in.
(6 to 10 mm)
1-3/4 to 1-7/8 in.
(44 to 48 mm)
Brake Band
Adjustment Nut
1/2 in.
(13 mm)
Clutch
Idler Pulley
Engine Pulley
PTO Drive
Pulley
Summary of Contents for MT, MTL, MTEFI, MTLEFI
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