Great Plains 7560 Series VII Field Cultivator-Rigid Hitch Operator Manual - Manual (Page 24)

Section 1: Assembly
Table of Contents ► Great Plains Mfg., Inc.
Series VII 7551-7560 Field Cultivator, Rigid Hitch 560-199M 2/01/2005
22
Fold Cylinders, Rocker Arm and 3” Rollers Assembly
Connect the center fold 4 x 24
cylinders (1) to the center fold bracket as
shown in Figure 9. Use the 1” x 3½ clevis pin
(2) with 1” machine washer and 3/16 x 2 cotter
pin. Attach the 6 1/2” rocker (3) to rocker
bracket with 1 x 3 Headed Pin (4) using 1”
machine washer and 3/16 x 2 cotter. Do Not
Connect Rod End Of Cylinders To Rockers
Before They Are Charged With Oil.
Figure 9
Connect the base of the 4 x 16 fold
cylinders (7) to the cylinder mount/hinge with
1 x 3 1/2 clevis pin (2), 1” machine washer and
cotter (see Figure 10). Do Not Connect Rod
End Of Cylinders To Rockers. Bolt the hose
holders (5) to the center frame with a 1/2 x 4 /2
hex bolt (6), using a lock washer and hex nut.
Place a support block of wood under
the cylinders, as shown, so they clear the
rockers in the extended position. You are now
ready to connect the hydraulic hoses to the
cylinders and charge the fold system (see
hydraulic layout).
Figure 10
Once the fold cylinders are fully
charged and free of air, connect them to the
rockers. Use a 1 x 5 1/2 bolt (8) to bolt two 3”
rollers (9), one on each side, to the 180 degree
rocker as shown in Figure 10. Secure with 1”
nylon lock nut. Rollers must turn freely
On rear fold machines with magnum
shanks, the inside fold cylinders fittings must
be rotated to prevent interference with
magnum shank upright, (see Figure 11).
Figure 11
5/15/2007