Great Plains 4000TM Assembly Manual - Manual (Page 22)

18 1800-3000TM Table of Contents Index Great Plains Manufacturing, Inc.
586-536E Table of Contents Index 04/12/2013
Purging Hydraulic System
Note: When lift and fold hoses are routed and hooked
up to cylinders and valves the systems will need
purged of air. Purging the lift and fold system now
will allow the wings to be folded and unfolded. The
machine may also be raised up or down for ease
of gang assembly installation.
Refer to Figure 18
70. Charge the lift system first. Extend the lift cylinders
(black handles) until the center section is fully raised.
Remove the cylinder transport locks
and store on
lift straps . Raise and lower the lift system several
times to purge air from system. Watch for leaks and
retighten fittings if necessary.
71. You may now charge the fold system. Before charg-
ing the fold cylinders , make sure the rod end of the
cylinders are un-bolted or un-pinned and block is
placed under cylinders as shown, 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 cylin-
ders several times to purge air from the system.
72. Now the rod end of fold cylinders may be hooked
up to wing with the 1 x 3 1/8 usable pin , 1.5 x 1.0
x.075 machine washer and 3/16 x 2 cotter pin. Bend
cotter pin over to secure.
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