Electric Pto Clutch - Toro Z MASTER 2000 Series Service Manual

PTO Switch Test (continued)

Electric PTO Clutch

Electric PTO Clutch Removal
Electric PTO Clutch Installation
2000 Series Z MASTER® Service Manual
3438-778 Rev A
• Pin 1 and 4 should NOT have continuity (open)
• Pin 2 and 5 should NOT have continuity (open)
The PTO clutch electronically controls the engagement and disengagement
of the PTO pulley (deck belt).
The PTO clutch is composed of three major components:
•
Field
•
Clutch Plate
•
Friction Plate
The clutch plate always turns with the engine (crankshaft). The field is a coil of
wire on an iron core which becomes an electromagnet when power is applied.
The friction plate is the only piece that moves vertically on the crankshaft. It is
normally spring loaded so that it is not in contact with the clutch plate and is
pressed against the brake material opposite the clutch plate. When power is
applied, the friction plate is pulled toward the clutch plate and the two rotate as
one. When the clutch plate and the friction plate rotate as different speeds it
is known as clutch slipping.
1. Park the machine on a level surface and disengage the PTO. Stop the
engine, wait for all moving parts to stop, and remove the key.
2. Disconnect the battery by removing the negative cable first, then the positive
cable from the battery.
3. Raise and support the unit so that the drive wheels are off the ground.
4. Remove the mower belt.
5. Disconnect the clutch wire connector from the clutch.
g336161
6. Remove the clutch mounting bolt and washers. Slip the clutch off of the
crankshaft.
1. Install the clutch onto the crankshaft verifying that the slot in the clutch aligns
with the tab on the clutch anchor
Mower Belt Replacement (page 6–6)
Figure 92
Page 8–11 Electrical: Service and Repairs