Diagnosing Pto Clutch Problems - Swisher ZT2452A Repair Manual

DIAGNOSING PTO CLUTCH PROBLEMS

The electric clutch can be activated when the ignition switch is in the run position.
For the purpose of checking out a problem with the circuit; the engine doesn't
have to be running; the switch just needs to be in the run position.
First the battery has to have a full charge. Current will flow from the battery to the
connecting point at the solenoid. From there it flows through the red wire,
through the fuse and onto the ignition switch. If the switch is in the run position,
current will flow on to PTO switch. When the PTO switch is pulled on; a
connection is made to pass the current to the clutch. For the current to continue
on; there must be a good ground connection for the white wire.
Checking the circuit is done by following the circuit
from the battery to the ground; making sure that all
wiring has good connectors and switches are making
connection. A voltage meter is a good tool to check for
voltage at each connection and each switch. If there is
voltage on the brown wire at the clutch, but it still
won't engage, you probably have a defective clutch.
Make sure it has a good ground on the white wire
before you replace it.
Apply a negative ground to this terminal
Apply 12 volts to this terminal. Clutch should
activate, if it doesn't, clutch is defective.
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