Great Plains 7552 Series VII Operator Manual - Manual (Page 27)

Great Plains Mfg., Inc. Table of Contents ►
Section 1: Assembly
3/31/2004 Series VII 6326-7552 Discovator 550-221M
23
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 10. Use the 1” x 3½ clevis
pin (2) with 1” machine washer and 3/16 x 2
cotter pin. Attach the 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 10
On 5-section models, connect the base
of the 4 x 16 DB fold cylinders (7) to the
Rocker/Fold bracket with 1 x 3½ 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 ½ x 4½ 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 11
Once the fold cylinders are fully
charged and free of air, connect them to the
rockers. Use a 1 x 5½ bolt (8) to bolt two 3”
rollers (9), one on each side, to the 180 degree
rocker as shown in Figure 11. Secure with 1”
nylon lock nut. Rollers must turn freely!