wsm L503 Workshop Manual page 207

L3130 · L3430 · L3830 · L4630 · L5030, WSM
(E) Control Linkage
(1) HST Assembly
(2) HST Control Lever
(3) HST Control Rod
The speed control pedal (HST pedal) (4) and the HST control lever (servo control lever) (2) are linked with the pedal
bracket (5) and HST control rod (3). And HST pedal (4) and the neutral holder arm (10) are linked with pedal bracket
(5) and neutral rod (7) through connecting shaft (6).
As the HST pedal (4) is depressed to forward, the HST control lever (2) is rotated, then the swashplate is tilted by
servomechanism and forward travelling speed increases. Then, the swashplate is returned to neutral with the neutral
holder arm (10), when the pedal is released. The ball bearing (9) on the neutral holder (8) pulled with the neutral spring
(11) seats the detent of the neutral holder arm (10) so that the neutral holder arm returns to neutral.
The damper (12) is connected to the HST pedal (4) through connecting shaft (6), neutral rod (7) and neutral holder
arm (10), restricts the movement of the linkage to prevent abrupt operation or reversing.
(4) HST Pedal
(5) Pedal Bracket
(6) Connecting Shaft
(7) Neutral Rod
(8) Neutral Holder
(9) Ball Bearing
3-M33
TRANSMISSION
(10) Neutral Holder Arm
(11) Neutral Spring
(12) Damper
KiSC issued 02, 2007 A