Operation - wsm L503 Workshop Manual

L3130 · L3430 · L3830 · L4630 · L5030, WSM

(3) Operation

The oil flows into the clutch valve and opens the
check valve (1). When the shift lever is set at the
"ENGAGED" position, the spool (2) is turned to (a)
position, then the oil flows through the spool (2) into the
accumulator and the clutch pack. Oil entering the clutch
pack pushes the piston (4) to engage the clutch pack.
The accumulator absorbs the engaging shock of the
clutch pack.
When the shift lever is set at the "DISENGAGED"
position, the spool (2) is turned to (b) position, then the
oil is stopped by the spool (2) and the oil in the PTO
clutch pack and accumulator is drained into the
transmission case. Thus the piston (4) is pushed back,
the brake plate (7) is also moved to contact the brake
disc (6) so as to stop the rotation and the drag of the PTO
shaft.
(1) Check Valve
(Except HST Model)
(2) Spool
(3) Plate
(4) Piston
(5) Brake Spring
(6) Brake Disc
(7) Brake Plate
(8) Return Spring
(9) Clutch Disc
(10) Back Plate
(11) Clutch Hub
(12) Accumulator Piston
(13) Bearing Case
3-M40
TRANSMISSION
(a) ENGAGED Position
(b) DISENGAGED Position
(c) From Regulator Valve or
HST Charge Pump
(d) Drain (To the Transmission
Case)
A : PTO Clutch Valve
B : Accumulator
C : PTO Clutch Pack
W1025465
KiSC issued 02, 2007 A