3PYPA
Table of Contents
Index
Maintenance and Lubrication
Great Plains
| 401-647M | 2019-06-11
Table of Contents
Index
117
Wing Flex Cylinder Bleeding
Refer to Figure 144 and Figure 145
1. Consult the appropriate flex circuit hydraulic
diagram:
“
Lift Hydraulics (Wing Flex)
” on page 145, or
“
Lift Hydraulics (Weight Transfer)
” on page 146
(partially repeated here for reference).
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.
Wing Fold Cylinder Bleeding
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.
Crushing and Equipment Damage Hazards:
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 Hydraulics (no Markers)
”, page 147, or
“
Wing Fold and Marker Hydraulics
”, page 148
(partially repeated here for reference)
2. If a leak or component failure is suspected, correct it
before proceeding.
3. Check that tractor hydraulic reservoir is full.
4. If the planter wings are folded, safety chain the wings
together before proceeding.
Figure 144
Wing Flex Cylinders
25422
Figure 145
Wing Flex Cylinder JICs
25197
L
R
5
6
5
6
Figure 146
Wing Fold without Markers
25195
L
R
8
7
7
8
