(1) Piston head guide
(2) Dust seal
(3) Bushing
(4) Cylinder cap
(5) O-ring
(6) Piston rod
(7) Cylinder body
(8) O-ring
Fig.9-8 Lift cylinder
(17) Flow regulator valve spool
(18) Spring
(19) Nipple
(20) O-ring
(21) Lift chain
(22) Plug
(23) Lock screw
(24) Snap ring
(9) Piston
(10) Packing
(11) Snap ring
(12) Yx-ring
(13) Nut
(14) Cotter pin
(15) Set screw
(16) Knock-out pin
(25) Chain wheel
(26) Plug
(27) Stop plate
(28) Set screw
(29) Screw plug
At the bottom of the lift cylinder is a cut-off valve (See Fig.9-9), which operates
when the high-pressure hose bursts for any reason to prevent the load from dropping
down abruptly. The oil from the lift cylinder flows through small holes in the
circumference of the cut-off valve spool and produce a pressure difference between
two chambers. As the pressure difference as result of passing the holes is smaller than
-78-
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