Great Plains 3PYP Operator Manual - Manual (Page 168)

164 3PYP Table of Contents Index Great Plains Manufacturing, Inc.
401-312M Table of Contents Index 2014-09-09
Bleeding Wing Flex Hydraulics
Refer to Figure 129 and Figure 130
1. Consult the Parts Manual for the appropriate flex
circuit hydraulic diagram for your planter.
2. Check that tractor hydraulic reservoir is full. Set
hydraulics for low flow rate.
3. Set circuit to Retract and retract cylinders until they
stop.
4. Set circuit to neutral.
5. Loosen JIC fitting at right cylinder, base end :
6. Set circuit to Extend until fluid appears.
7. Neutralize circuit and secure JIC fitting.
8. Set circuit to Extend until rods extend to stop.
9. Neutralize circuit and loosen JIC fitting at left
cylinder, rod end
:
10. Set circuit to Retract until fluid appears.
11. Neutralize circuit and secure JIC fitting.
12. Extend and retract circuit several times.
Bleeding Wing Fold Cylinder Hydraulics
Normally the fold hydraulics are bled at the factory before
shipping, and bleeding should not be required other than
to fold fully and hold lever on for one minute or until all
cylinders reach the end of their stroke.
Do not unfold planter if significant bleeding is necessary. It is
not safe to unfold with air in the fold system. If significant air
is suspected, skip step 5.
1. Consult appropriate flex circuit hydraulic diagram for
your planter:
“Wing Fold without Markers (all s/n)” on page 127
“Wing Fold with Markers (all s/n)” on page 128
(both partially repeated here for reference)
2. Check that tractor hydraulic reservoir is full.
3. Unfold the wings. See “Unfolding The 3PYP” on
page 28 If the planter is equipped with markers,
leave the marker switches Off during this bleed.
4. Set hydraulics for low flow rate. Disconnect the rod
ends
of both wing fold cylinders, so that they may
extend without moving the wings.
Figure 161
Wing Flex Cylinders
25422
1
Figure 162
Wing Flex Cylinders
25197
L
R
1
2 2
Figure 163
Wing Fold without Markers
25195
L
R
2
3
1
4
3