KB21 Service Manual Pub 09-14
62
Cylinder Control Systems
40-A. Bucher L.8S Manual Control/Cable
Valve Ports
Valve Ports designated as “B” Ports connect to the Rod End of the Swing and Lift Cylinder, and to the
Barrel End of the Dipper and Tilt Cylinder.
Valve Ports designated as “A” Ports connect to the Barrel End of Swing and Lift Cylinder, and to the
Rod End of the Dipper and Tilt Cylinder.
One Way Restrictors
alve from the Cylinder. The
illustration depicts a standard 4 Spool Valve.
Valve Sections Function
Dash Size Nominal Cyl.
Size (in)
Torque in.lbs. Torque
-4 1/4” 140 12
-6 3/8” 230 19
-8 1/2” 450 38
-10 5/8” 650 54
-12 3/4” 900 75
-16 1” 1200 100
-20 1-1/4” 1600 133
-24 1-1/2” 2000 167
-32 2” 2800 233
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