CHAPTER 4 8454
4-20
D569-W02 May-2003
• In case PTO clutch switch is OFF
1. If PTO switch on the instrument board is turned OFF
(neutral), the circuit returning from the priority valve
via the solenoid valve and the modulating valve to
Port A of PTO clutch is disconnected.
2. Piston (2) of PTO clutch is moved by the tension of
return spring (7) as directed by the arrow above. As
the force to push the clutch disc disappears, the
power transmitted from PTO clutch shaft (16) to PTO
drive shaft is disconnected.
3. And oil after clutch is OFF lubricates the shaft and
bearing parts of PTO clutch just like at ON.
(1) Clutch Body (8) Pressure Plate
(2) Piston (9) Snap Ring
(3) Piston Ring (10) Clutch Disk
(4) Piston Ring (11) Clutch Plate
(5) Brake Plate (12) Ball Bearing
(6) Return Plate (13) Needle Bearing
(7) Spring
(14)Seal Ring (20) Bracket
(15) Spline Hub (21) Ball Bearing
(16) PTO Clutch Shaft (22) Snap Ring
(17) Bush (23) Spacer
(18) Snap Ring (24) Snap Ring
(19) Snap Ring (25) PTO Drive Shift
569W420A
Inertial Brake
Brake disc (5) with a protuberance at one section there
of is installed on PTO clutch. Clutch disc (10) is pushed
to clutch case (1) by return spring (7) and PTO clutch is
surely stopped by the protuberance of the brake ring in
contact with the rib of the transmission case if PTO is
OFF.
In addition, this brake application has an advantage of
convenience for installing PTO shaft on the universal
joint while PTO is stopped, because PTO shaft is turned
approx. 60 ~ 80° when PTO is stopped.
www.mymowerparts.com
K&T Saw Shop 606-678-9623 or 606-561-4983
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