Kubota WSM ZD331 User Manual

2-M10
ZD321, ZD326, ZD331, WSM
TRANSAXLE
■ PTO Clutch “Disengaged”
W1016225
After starting the engine, when the PTO clutch lever is set at the “Disengaged” position, the hole of PTO valve
lever dose not face to hydraulic pump port.
Since oil from hydraulic pump is blocked at the PTO valve lever, oil dose not flow to the PTO shaft. Blocked oil
flows to the hydrostatic transmission and oil cooler to the regulator valve.
Oil in the clutch pack drained through the PTO valve lever into the center case (5).
Thus the clutch piston (9) is pushed back by the spring (8). When the piston (9) is pushed back, the piston pushed
the brake plate (4) and brake disc (10), the rotation and drag of the PTO shaft (12) stop.
(1) PTO Clutch Valve
(2) Poppet
(3) Center Case, Front Cover
(4) Brake Pressure Plate
(5) Center Case
(6) Center Case, Rear Cover
(7) Clutch Gear
(8) Spring
(9) Clutch Piston
(10) Brake Disc
(11) Clutch Spline Boss
(12) Clutch Shaft (PTO Shaft)
(A) From Hydraulic Pump
(B) To Oil Cooler
(C) To Hydrostatic
Transmission
(D) To Center Case
KiSC issued 04, 2007 A

Kubota WSM ZD331 Specifications

General

Transmission	Hydrostatic
Fuel Type	Diesel
Cylinders	3
Engine Type	Diesel
Cutting Width	72 inches
PTO	Independent
Type	Zero-Turn Mower
Displacement	68.5 cu in
Drive	2WD
Turning Radius	Zero