Great Plains 3PYP Operator Manual - Manual (Page 169)

Great Plains Manufacturing, Inc. Table of Contents Index Appendix D: Older Equipment 165
2014-09-09 Table of Contents Index 401-312M
5. Retract the wing fold circuit.
6. Loosen the JIC fittings at both wing fold cylinder
base ends
.
7. Set wing fold circuit to Extend until fluid emerges.
8. Neutralize the circuit and secure the fittings.
9. Extend the wing fold rods.
10. Loosen the JIC fittings at both wing fold cylinder rod
ends .
11. Set wing fold circuit to Retract until fluid emerges.
12. Neutralize the circuit and secure the fittings.
13. Re-attach the rod ends to the wings.
14. Fold and unfold wings several times.
A1006S-, A1007S-A1024S Lift System
(Rephasing applies only to s/n A1006S- planters with
rephasing double-acting cylinders. Single-acting and
parallel-plumbed double-acting cylinders on later
planters never require rephasing.)
In typical use during a single planting operation, it is
normal for the lift cylinders to get out of phase, resulting
in uneven raising and lowering of the 3PYP.
Every 8- to 10 passes, re-phase the cylinders with this
procedure:
1. Raise the planter completely, and hold the hydraulic
lever or switch in Extend for several seconds after
the planter reaches full elevation, or until all cylinders
are fully extended.
2. When all cylinders are fully extended, momentarily
reverse (Retract) the control to lower the planter
1 ⁄
2
inch.
A1007S-A1023S Lift Bleed
If your planter is serial number A1006S or lower, skip to
step 7.
3. Loosen the JIC fitting at the base end (top) of the
left lift cylinder.
4. Extend the lift circuit until fluid appears at the
loosened fitting. Set control lever to neutral and
secure the fitting.
5. Loosen the JIC fitting at the base end (top) of the
right lift cylinder.
6. Extend the lift circuit until fluid appears at the
loosened fitting. Set control lever to neutral and
secure the fitting.
Figure 164
Wing Fold with Markers
25062
L
R
3
3
4
4
4
3
Figure 165
Single-Acting Lift Assist Circuit
27373
L
R
1
2
1
2