Great Plains 3N4010HDA Operator Manual - Manual (Page 28)

24 3N-4010HDA Table of Contents Index Great Plains Manufacturing, Inc.
196-444M Table of Contents Index 2013-09-24
Re-phasing Lift System
Over a period of normal use the cylinders may get out of
phase. This will cause some drill sections to run higher
than others. To rephase cylinders:
1. Raise the drill completely and hold the hydraulic
remote lever on for several seconds until all cylinders
are fully extended. Do this every 3 or 4 times you
raise drill out of ground.
2. When all cylinders are fully extended, momentarily
reverse hydraulic remote lever to Retract height
1 ⁄
2
in
(6.3cm) to maintain levelness.
Fold Selector Valve
If optional markers are installed the hydraulic circuit is
shared with the fold cylinders. A selector valve on the drill
switches the circuit between Fold and Markers.
Refer to Figure 20
(a front view of the valve set for Marker operations)
The drill selector valve is located on the left wing tool bar
near the tongue drawbar.
Figure 19
Lock Channel Storage
20268
20269
Figure 20
Fold/Marker Selector Valve
21844