Great Plains 7552 Series VII Operator Manual - Manual (Page 26)

Section 1: Assembly
Table of Contents ► Great Plains Mfg., Inc.
Series VII 6326-7552 Discovator 550-221M 3/31/2004
22
Center Lift Cylinder, Rest Pads and Hydraulic Valves Assembly
Connect the two 3½ x 8 (4 x 8 for 7548
& 7552) rephasing main lift cylinders (1) to
the center hitch pole as in Figure 9. Connect
the rod ends to the lugs on the H-bracket.
Place a 1” flat washer on each side of the lug
on the H-bracket to keep the hardened
bushings from coming out.
Secure the cylinders with 1 x 3½”
clevis pins (2), 1” machine washers and 3/16 x
2 cotter pins. Mount the rebound valve (3) as
shown with the V1 port to the front and top
using two 5/16 x 4 hex bolts (4) with lock
washers and hex nuts.
Install the depth stop mounting bracket
(5) to the center brace bar using two 5/8 x 3 x
5½, (Disc) or 5/8 x 4 x 5 ½ (Coulter) u-bolts
(6), lock washers and hex nuts. Bolt the depth
stop valve (7) on top of the bracket using the
5/16 x 2 hex bolts with lock washers. Insert
the depth stop tube (8) into the mounting
bracket (5) and attach to the level bar with ½
flat washer and 1/8 x 1 cotter pin. Bolt the
depth stop assembly (9) onto depth stop tube
(8) with two ½ x 2½ hex bolts (10) using ½”
lock washers and hex nuts.
U-bolt the 3 1/2” cylinder rest pads
(11) on the center bar as shown, using a ½ x 3
x 5 u-bolts (12) with lock washers and hex
nuts (see shank layout drawing for exact
placement). On double fold models, u-bolt the
3½” cylinder rest pads (11) on the back bar
using a ½ x 3 x 5 u-bolts (12) with lock
washers and hex nuts.
Figure 9
2/07/2005