TRANSMISSION SYSTEM
4-19
D569-W02 May-2003
[PTO CLUTCH VALVE]
A. OPERATION
• In case PTO clutch switch is 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
1. If PTO switch on the instrument board is turned ON
(auto or manual), constant oil amount of 7
/min
regulated at Port P of priority valve ass’y flows into
Port A of PTO clutch via the solenoid valve and the
modulating valve.
2. This oil flows into the rear of piston (2) and pushes
the piston out as directed by the arrow above while
pressing return spring (7). Power transmitted from
PTO propeller shaft and PTO clutch shaft (16) as
return plate (6), clutch disc (10) and clutch plate
(11) are pushed toward pressure plate (8), is trans-
mitted to PTO drive shaft (25).
3. Pressure in PTO clutch circuit increases as the
modulating valve is shifted, slowly up to 16 ~ 18 kgf/
cm
2
controllable by the relief valve. And oil after the
PTO clutch is ON flows to Port L of PTO clutch and
lubricates the shaft and bearing parts.
(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
569W419A
www.mymowerparts.com
K&T Saw Shop 606-678-9623 or 606-561-4983
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