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A-Boom (JD 6615 / 7615 Asy Instruction Manual) 07/03
© 2003 Alamo Group Inc.
Section 8 - 6
Cylinder Control Valve Installation
System Schematic
(Typical 17' through 23' with 4 Spool Valve)
Filter
Hyd.
Tank
Motor
Control
Valve
Motor Return
Motor Pressure
M 1
M 2
Control Valve
Tilt Cyl.Dipper Cyl.
Hyd. Pump
Swing Cyl.
Lift Cyl.
Figure 2
Hydraulic Motor
Cylinder Hydraulic Control Circuit: (See Figures 2 & 3)
The Hydraulic Schematic above shows a 5 Spool System, The 4 Spool System is the same
with the exception the 5 th spool which is installed between the Dipper and Tilt Cylinder Spools. When
you assemble this you will not have to assemble the Valve, it will come to you already assembled as
a 4 Spool or 5 Spool depending on which model and which option you ordered. Hoses must be
connected to the correct Valve Port so the Control Funtions will operate in the correct direction.
"A"
"B"
Boom Entend (28')
or Door Cyl. Option