HEAVY DUTY
SOD CUTTER
23
MAINTENANCE / SERVICE
CUT-OFF THEORY OF OPERATION PRESSURE PLATE
1. The cut-off Unit is a single revolution, self contained, friction clutch and brake unit.
2. A spring loaded pressure plate, with a horizontal movement of approximately .005”, is controlled to apply
pressure on one of the friction discs on each side of the plate.
3. When the plate is pulled back (spring compressed) The braking friction disc makes contact with the
stationary housing which stops the rotary movement of the plate.
4. When the plate is released (spring expanded) the clutch friction disc comes into contact with the revolving
flywheel and rotates the plate is again pulled into its braking position.
5. As the pressure plate rotates through its single cycle, the connecting rod drives the cut-off blade in and
out of the ground.
CLUTCH
LINER
Cut Away View Of Automatic Cut-Off
SHIMS
WASHER
LOCKING
SCREW
END BOLT
TIE ROD
CAM
YOKE
SPRING
HOUSING
FLYWHEEL
TRUNNION
ROLLER
SET
SCREW
PLUG
SHAFT NUT
(ADJUSTING NUT)
BRAKE
LINING
PRESSURE
PLATE
PRESSURE PLATE CONTROL
1. The control of the pressure plate is accomplished
through the spring in the center of the clutch
shaft and two rollers mounted on the cam end.
2. The rollers ride on an incline on the cam end,
and when on the rise on the incline, pull the
spring shaft (attached to the pressure plate) back
against the spring into the braking position.
3. When the rollers are on the low spot of the
incline, the spring forces the pressure plate
against the flywheel.
HOUSING
ECCENTRIC
SHAFT
ROLLER
SHAFT
NUT
SPRING
CLUTCH
FRICTION DISC
FLYWHEEL
PRESSURE
PLATE
BRAKE
FRICTION
DISC
SPRING
SHAFT
CAM
APPROX.
.005”
Pressure Plate Operation
Summary of Contents for 544853G
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