OPERATION
FN180/FN120 07/12
Operation Section 4-11
© 2012 Alamo Group Inc.
OPERA
T
ION
Operating Mower Hydraulics with Two Tractor Hydraulic Ports
The lines that operate the wings must be plumbed together and will be controlled using one hydraulic control
valve and the center section with the remaining control valve. Ensure that the operator is aware that each wing
cannot be controlled independently nor will they raise and lower simultaneously.
Operating the Mower Hydraulics with a 3-Spool Hydraulic Control Valve (Extra Equipment)
Ensure the valve matches the hydraulic operating system of the tractor (open or closed center). Refer to the
Assembly Section for additional information on equipping the tractor with a 3-spool control valve.
Mount the valve bank to a tractor fender or other accessible location. Connect valve bank inlet and outlet lines
to outlets of the same tractor hydraulic port. Connect the mower hydraulics to the control valve bank with the
center section line to the right port. Connect the wing cylinder lines to the control valve positioned to
correspond with the left and right wing.
To activate the 3-spool hydraulic control valve, tie the tractor’s hydraulic control lever back to keep hydraulic oil
continuously fed to the valve bank.
Hydraulic Line Support
After connecting the mower hydraulic lines to the tractor, support the hoses with the equipped brackets. Ensure
that hoses do not contact the driveline, do not bind while turning, and do not become pinched or kinked.
Hydraulic Cylinder Priming
Hydraulic Cylinders must be filled with hydraulic oil before removing the wing transport braces to lower the
mower wings. Hydraulic cylinders and lines are filled by holding the valve control levers in the raised position
until the cylinders fully retract (wing cylinders) and extend (center cylinder). Place control levers in the float
position and repeat process a second time. Ensure wings are entirely supported by the cylinders before
removing the transport braces. NEVER drive out bar pins and NEVER remove braces that have tension on
them.
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