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Tractor Stack Valve Modifications S/N 398797 & UP
Tractor Stack Valve Modifications: S/N 398797 Jan. 2004 and Up
The RH End Spacer Block of the Tractor Stack Valve must be added. This applies to units
with S/N 398797 Jan. 2004 and Up only. For trators with Earlier S/N and Date see the front of this
section for installation of the old LH end plate.. CHECK which Valve & S/N you have before starting
this assembly. The original Stack valve does not have the Load Sense Port or the Load Sense Bleed
Off Adjustment Valve. These are required to make the Machete Control Valve Hydraulic systems
operate using the Tractor Hydraulic Source. Shown in Figure 1 is a drawing of the replacement RH End
Spacer Block for the Stack Valve, The replacement part is furnished as part of the mount kit as Assembly
P/N 02980927.
The replacement of this end Spacer Block is critical; the method of changing the end plate is
critical. It is recommended that you read this entire section before starting any work as you can damage
the Stack Valve and Tractor Hydraulic System if this is not done correctly. There are some things that
must be done.
1.
The area around the Stack Valve must be Clean. No dirt, Paint chips or anything that would
contaminate the hydraulic system can not be present.
2.
The Stack Valve must never be unbolted unless the Valve has been clamped together to prevent
any pieces from slipping apart or getting mis-aligned. There are small metal disks between
sections that must not be allowed to slip out of place, The replacement Spacer Block has a metal
disc that must be in place.
3.
All Hoses and fitting must be clean, before installing any Hoses or fittings clean them with clean
filtered compressed air. Watch for any metal shavings that would splinter off of a threaded part
or hole. Remove any that are found. Do not let any Thread Sealer, Pieces of O-Rings or Gaskets
enter system it will plug and damage system.
1.
Effective January 2004, John Deere
implemented a new rear remote valve on all 6015 &
6020 series tractors (See Figure 28, 29 & 34). The
right side of the valve is significantly different and can
be easily identified from its predecessor (See figure
30 or the prevous pages). As a result, a new right
hand power beyond end plate kit #02980927 is
provided with each mount kit - effective April 2, 2004.
For tractors produced before January below serial
#398797, you will need to order the old left hand valve
end plate kit #02980930 as a separate line item.
Caution: The new valve end plate kit is set up for
tractors equipped with either a one or two spool
remote valve. Tractors equipped with three remotes
(See Figure 31) or more will require longer end plate
mounting studs - which must be purchased from
John Deere at the dealer/customer's expense.
For John Deere Publication: See Catalog Name - 6320, 6420 Tractors (North American Edition), Page
Name - Selective Control Valves. Catalog: 4357 / Grid: 7F6 / Section: 72 / Page: 11
2.
Remove RH Stack Valve End Plate. The instructions to change the RH end plate are very sinialr
to the instructions for LH end plate. Use the same precautions and preperations. The valve must be
clamped together to prevent any of the components from moving. (See Figure 32 & 33)
Machete (JD -62,63,6420 Asy Man) 10/04
© 2004 Alamo Group Inc.
Figure 29
Section 5 - 13
New Style S/N 398797
Jan. 2004 & Up
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