Cub Cadet 8454 - Manual (Page 277)

HYDRAULIC SYSTEM
6-83 D569-W02 May-2003
(4) Falling valve: as spool (1) is operated, the falling valve (4) falls
down by a spring to open the pipe line (C) and the oil is exhausted
from the cylinder.
(refer to the figure of “exhaust stage”)
Operation principle of MLS valve exhaust stage
The oil supplied from the pump is exhausted to the transmission
case as spool (2) closes the pipe line (A) and piston (1) falls down by
oil pressure to open the pipe line (B). And while spool (2) falls own,
the falling valve (4) is operated by a spring to open the pipe line (C)
and exhaust the oil of the cylinder which results in the fall of lift arm.
(exhaust stage)
Components Trouble Checking Remark
2. Double-acting
valve assembly
Operation of main components
(1) Piston: as spool (2) closes the pipe line (A), piston (1) falls down
to open the pipe line (B).
(2) Spool: spool (2) is pushed by a link device to the direction of arrow
to close the pipe line (A).
(3) Check valve: does not work.
(4) Falling valve: as spool (2) falls down, the falling valve (4) falls
down by a spring to open the pipe line (C).
(1) Piston
(2) Spool
(3) Check Valve
(4) Falling Valve
569W6B5A