Great Plains
| 560-484Q-ENG | 2021
-
02
-
09
26
Product #
Assembly
Purging Hydraulic System
Refer to Figure 31
158.Charge the lift system first. Extend the lift cylinders
(black handles) until the center section is fully raise.
Remove the 1 x 4
1
2
cylinder transport lock pin . The
wings will not start to raise until the center cylinders are
fully extended and the master cylinders begin to bypass
oil through the rephasing ports, to the wing cylinders.
Watch for leaks and re-tighten fittings if necessary.
Continue to pump oil to the lift system until the wing
cylinders are also fully extended. At this point, reverse the
flow and lower the unit to the ground, retracting all
cylinders. Raise and lower the unit several times to purge
air from the system.
159.You may now charge the fold system. Before charging the
fold cylinders , make sure the rod end of the cylinders
are un pinned and block is under cylinders as shown on
rear cylinders, so that when the rod is extended, it will
clear the wing fold brackets. Extend the fold cylinders
(green ends) completely and then close them. Extend and
retract the cylinders several times to purge air from the
system. Now the cylinders may be extended far enough to
be connected to the wing fold brackets.
160.Remove wood block and install 1 x 7 Gr. 8 special thread
bolt , 1 flat washers and 1 top lock nut to rod end of
inside wing cylinders and slot in fold bracket.
Tighten 1 x 7 Gr. 8 special thread bolt down to
where there is
1
16
” to
1
8
” gap. Be sure bolt will still
turn freely
161. Remove wood blocks and install 1 x 7 hinge pins , 1
flat washers, 1
3
4
rollers and
3
8
x 2 roll pins to base end of
outer wing cylinders and rocker.
2
1
4
3
5
1
3
Figure 31
Hydraulic Purging
41917
1
2
3
3
4
4
5
