3PYP
Maintenance and Lubrication
103
2018-07-24
401-312M
Bleeding Lift Hydraulics
Refer to Figure 133 and Figure 134. Figure 133
depicts the parallel arms disconnected from the seed
support structure. Disconnect only the cylinder rod
end for bleeding.
Normally the lift hydraulics are bled at the factory before
shipping, and bleeding should not be required other than
to raise fully and hold lever on for one minute or until all
cylinders extend fully.
If the planter has wing flex cylinders or hydraulic down
pressure, bleed the small cylinders at the wing/center
coupling before bleeding the lift circuit. See “
If necessary to further bleed system, follow these steps.
1.
Consult the lift circuit hydraulic diagram for your
planter:
“
Lift with Wing Flex Lock (s/n )
Lift with Hydraulic Down-Pressure (S/N
Lift with Hydraulic Down-Pressure (S/N )
page 135
(both partially repeated here for reference)
2.
Check that tractor hydraulic reservoir is full. Set
hydraulics for low flow rate.
3.
Lower planter.
Lift Bleed: s/n
If your planter is serial number A1024S or lower, see
“
4.
Disconnect and lower rod ends of lift assist cylinders.
5.
Extend the lift circuit until rods are fully extended. Set
circuit to Neutral.
6.
Loosen the JIC fitting at the base end
(top) of the
left lift cylinder.
7.
Extend the lift circuit again until fluid appears at the
loosened fitting. Set control lever to Neutral and
secure the fitting.
8.
Loosen JIC fitting at base end
of right lift cylinder.
9.
Extend the lift circuit until fluid appears at the
loosened fitting. Set lever to neutral. Secure the
fitting.
10. Retract the cylinders. Set circuit to Neutral. Elevate
both cylinders until the rod ends are higher than the
base ends.
11. Loosen JIC fitting at rod end
of the left lift cylinder.
12. Retract the lift circuit again until fluid appears at the
loosened fitting. Set control lever to neutral and
secure the fitting.
13. Loosen JIC fitting at rod end
of right lift cylinder.
14. Retract the lift circuit again until fluid appears at the
loosened fitting. Set control lever to neutral and
secure the fitting.
15. Re-pin cylinders to seed cart lugs.
Figure 133
Lift Assist Cylinders
29209
Figure 134
Lift Cylinders
29112
L
R
1
2
3
4
Содержание Yield-Pro 3PYP
Страница 188: ...Cover Table of Contents Cover Table of Contents ...
Страница 189: ...Table of Contents Index Table of Contents Index ...
Страница 190: ...Great Plains Mfg 1525 E North St P O Box 5060 Salina KS 67402 ...