Great Plains 2S-2600 Assembly Instructions - Manual (Page 2)

195-298M 4/19/2007
Great Plains Mfg., Inc.
Counterbalance Update 2
Assembly Instructions
Overview of Installation Process
Refer to Figure 1
The new counterbalance valve will hang under the
center pressure reducing valve (1), in the exact lo-
cation where the P.O. check valve (2) is being
removed.
The pilot signal hose (3) will be reused, however
the pilot signal will be pulled from a different loca-
tion. The hose will be temporarily removed and
reinstalled in a different location.
The new counterbalance valve body is thicker
than the old P.O. check. Because of this the center
pressure reducing valve (1) will need to be
shimmed out with washers to make room for the
new valve. To add washers under the center pres-
sure reducing valve (1) the wing pressure valve
(4) will need to be unbolted and pulled out of the
way. The plumbing to the center pressure reduc-
ing valve (1) does not need to be disturbed.
Once the new counterbalance valve is installed
the drill needs to be raised and lowered so the
valve can be checked and adjusted, if necessary.
Refer to “Adjusting the Valve”, on page 6 of this
manual.
Figure 1
Original Plumbing Before Removing P.O. Check (No Point Row, No Open Center Kit)
21793