Blade Stop Stator Brake Circuit Wiring Diagram - Kohler Courage SV470 Service Manual

Section 7
Electrical System and Components
Blade Stop Stator Brake Circuit
The blade stop stator brake circuit is provided as a safety feature to ensure the application can meet ANSI
(American National Standards Institute) application blade stop requirements.
The circuit is activated if the operator gets off of the seat of the application while mower blade system is activated
or in certain reverse mow conditions.
The circuit is activated by taking the ignition shutdown (kill) lead to ground. This action turns on the stator-brake
relay which shorts the charging AC stator leads to produce a magnetic field that will counter or resist the rotation
of the flywheel. This added resistance to rotation decreases the amount of time it takes for the application deck
blades to come to a full stop.
As the Kohler blade stop stator brake circuit often is operated in conjunction with other application circuits, the
relay in the Kohler circuit is specially configured with a 680 ohm resistor in parallel with the relay coil. This is
done to negate transient voltage signals that would be normally created by interrupting the relay current once
the relay has been activated. Therefore, relay replacement must only be made with the properly identified relay.
Reverse Mow Module
(OEM Supplied)
TRIAC
Figure 7-12. Blade Stop Stator Brake Circuit Wiring Diagram.
7.14
12V Switched Power
Stator
90 Ω
Brake
Relay
Coil
Engine
NC
NO
Brake
PTO
NO
NC
Seat
680 Ω
CDI
Kill
Ignition
Key Switch