Great Plains 7336 DH Predelivery Manual - Manual (Page 19)

Great Plains Manufacturing, Inc. Assembly 15
2014-06-25 556-235Q
Purging Hydraulic System
Refer to Figure 14
38. Charge the lift system first, this includes the hydrau-
lics for the gauge wheel if equiped. Extend the lift
cylinders
(black handles) until the center section is
fully raised. Place a block under the gauge wheel
cylinder to allow it to move freely. Hold lever back so
the lift cylinders will be filled with oil. Remove the cyl-
inder transport locks
and store on frame plate .
Raise and lower the gang system several times to
purge air from system. Watch for leaks and retighten
fittings if necessary.
39. 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 a block is
under the cylinders as shown, so that when the rod
is extended, it will clear the wing fold brackets.
Extend the fold cylinders
(green handles) com-
pletely 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.
40. The fold cylinders may now be connected to the wing
fold brackets. Use the 1” x 5.38” snap ring pin , 1”
washers, and 1” heavy snap rings provided.
41. Charge the hydraulic leveling cylinder at this time
(red handles). Extend and retract this cylinder sev-
eral times also.
42. The unit may now be folded. Once unit is raised
completely, slowly fold the machine, watching that
hoses do not get pinched, etc.... Once machine is
fully folded, install the transport locks. Now the unit is
in transport mode.
1
5
2 3
4
5
4
6
1
3
2
4
5
6
Figure 14
Hydraulic Purging
43461