Great-plains 4000TM Assembly Manual User Manual download pdf (Page 32)

28 3500-4000TM Great Plains Manufacturing, Inc.

586-537Q-ENG 12/03/2013

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 22

87. 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.

88. You may now charge the fold system. Before charg-

ing the inside wing, fold cylinders and outside wing

(Model 4000 only), 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 and

(green ends) completely and then close them.

Extend and retract the cylinders several times to

purge air from the system.

89. Now the rod end of fold cylinders and may be

hooked up to wings 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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Great-plains 4000TM Assembly Manual User Manual Page 32