6
1205-NT Folding Marker Option 113-549M 5/5/09
Great Plains Mfg., Inc.
Single or Dual Markers
Without a Sequence Valve
Refer to Figure 5:
1. The markers should be manually folded into the transport
position when charging the hydraulic system for the first
time. Disconnect the cylinder pin (#1) from the rod end of the
cylinders and the marker link arms (#2) and swing the link
arm up and out of the way.
2. Connect the hoses to the tractors remote hydraulic outlets.
3. Loosen the hose hydraulic fittings at the rod end of the mark-
er cylinders (#3). With the tractor at idle speed, slowly work
the tractor remote lever in the direction which would retract
the cylinder. Don't try to retract the cylinder, the goal is to
push the air from the lines leading to the cylinder. When the
air is expelled and oil starts being pushed out, tighten the
hose connection at this cylinder.
4. Slowly work the tractor's remote lever in the same direction
to retract the cylinder. When it is retracted, loosen the hose
fitting at the base end of the same cylinder (#4). With the
tractor at idle speed, slowly work the tractor remote lever in
the opposite direction which should put oil to the cylinder
base port. When the air is expelled and oil starts being
pushed out, tighten the hose connection at this cylinder.
5. Once again, slowly work the tractor's remote lever in the di-
rection to fully extend the cylinder and hold it there for a few
seconds.
6. If you have dual markers, repeat steps 3 through 5 for the
other cylinder.
7. Once the system is bled, operate the tractor's remote levers
to fully extend the marker cylinders and reconnect the cylin
-
ders to the marker link arms.
8. The marker hydraulic system is equipped with needle valves
to control how fast each marker operates. The needle valves
are located in the hydraulic hose lines at the rod end of the
marker cylinders. Turn the adjustment heads clockwise to
slow the speed down and counterclockwise to speed it up.
Adjustments should be made for safe speeds at operating
rpm. Excessive folding speeds can cause marker damage
and may void the warranty, refer to
Needle Valve At Marker
Figure 7
14062
Figure 7.
(44 pages)
(45 pages)
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