Toro TITAN, Руководство по обслуживанию

Страница: 110 / 121

PTO Switch Test (continued)
• Pin 2 and 5 should NOT have continuity (open)
Electric PTO Clutch
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.
Electric PTO Clutch Removal
1. Park the machine on a level surface and disengage the PTO. Stop the engine,
wait for all moving parts to stop, and remove key. Engage the parking brake.
2. Disconnect the battery by removing the negative cable first, then the positive
cable from the battery.
3. Place the height of cut pin into the third hole to lock the mower deck in the
lowest height of cut position.
g344397
Figure 117
4. Lift and remove the floor pan from the machine.
Electrical System: Service and Repairs Page 8–10 TITAN® Max Service Manual
3442-428 Rev A