Cub-cadet RZT-S Series User Manual download pdf (Page 72)

RZT-S

Start Circuit

Turning the key to the START position:

• spins the starter motor

• enables the ignition

• energizes the afterfire solenoid

The circuit that sends power to the starter motor:

See Figure 7.8.

1. When the key switch is in the START position, bat-

tery power is passed from the “B” terminal to the “S”

terminal.

2. Power goes from the key switch S terminal to the

brake switch NO contacts. (orange wire)

2a. If the brakes are off, the switch plunger will be

up and the NO contacts will be open. The sys-

tem monitor will measure open circuit voltage,

illuminating the brake symbol.

2b. If the brakes are applied, the switch plunger will

be depressed, and the NO contacts will be

closed. Power will be passed along to the PTO

switch.

3. When the key is in START, and the brakes are

applied, power will continue to the A-NC terminal of

the PTO switch (orange/black trace).

3a. If the PTO switch is on, the NC terminal on the

“A” set of contacts will not connect to anything. The system monitor will measure open circuit voltage,

illuminating the PTO symbol.

3b. If the PTO switch is off, the NC terminal on the “A” set of contacts will be connected to the COM terminal

on the “C” set of contacts. Power will be passed along to the trigger terminal on the starter solenoid.

4. When the following conditions are met:

• Key to START

• park brake set

•PTO off

The starter solenoid trigger terminal will receive power (orange wire).

5. When the starter solenoid is energized, it internally connects the heavy red cable from the battery with the

heavy red cable that leads to the starter motor, and the starter spins.

+EY3WITCH

3TARTER3OLENOID

"ATTERY

.%'

0/3

&USE

'RND

'ROUND

04/3WITCHh/FFv

#/-

./

.#

3YSTEM

-ONITOR

3TARTER-OTOR

'ROUND

.#

./

"RAKE3WITCH

$EPRESSED

Figure 7.8

1 2 ... 67 68 69 70 71 72 73 74 75 76 77 ... 135 136

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Cub-cadet RZT-S Series User Manual Page 72

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