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Tractor Stack Valve Modifications S/N 398797 & UP
Tractor Stack Valve Hose Connections:
10.
Hose Size and tightening. The Next page list the torque for the hose fitting, the Hose number
to decimal size. Also shown is a drawing of the Rear Stack Valve and how it must be connected to make
the system work, review these after assembly is completed to assure it is correct.
The "B" ports will always connect to the Rod end of the Cylinder and will have the hoses with
the striped plastic ties on them. The "A" Ports will connect to Butt end of the Cylinder and will have the
hoses with the solid colored plastic tie.
The "T" Port always returns to the Tank. The "P" port is the pressure supply side. the "T" and
the "P" are marked in the Valve casting.
Always refer to this when running the hoses to the Valve.
Tractor Rear Hydraulic Valve Stack Connections:
Change End Plate Summary, The original JD Factory LH Valve End Plate (See Figure 2) on the rear
of the Tractor Hydraulic Valve Stack Outlet will have to be changed. The New LH Valve End Plate is
Part # 02978829. This is done to install a new Valve End Plate with the Load Sense Port (See Figure
5 and 6). The following steps are for installation of the new Valve End Plate, if these procedures are
not followed damage to the Tractor Hydraulic Outlet could occur. Figure 41 is standing behind Tractor
looking forward and shows the original end plates as well as the spacer block power beyonf that has
been installed. This a 2 remote valve shown, If you have the option 3 remote valve it will connect the
same way except you will have to use longer studs to install the spacer bloc, see the john deere dealer
for these studs.
Original LH End
Plate
Figure 41
Machete (JD -62,63,6420 Asy Man) 10/04
© 2004 Alamo Group Inc.
(continued)
Added Spacer Block
Power Beyond
No Ports in JD Original Valve End Plate
Section 5 - 18
Load Sense Bleed Off
Adjustment Valve,
Factory Set.
Pressure Port
Original RH
End Plate
Stud & Nuts
Tank Return Port
Load Sense Port
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