Great Plains Disk Harrow Field Update Disk Leveler - Manual (Page 8)

Installation Instructions Great Plains Mfg., Inc.
SeriesI 3323DH-4336DH Leveler Update 557-330M 2/05/2008
8
Assembly Instructions (Part 2)
Connect the back of the existing level bar assembly (Item 11, Figure 4) to the top of the
torque tube extension bracket with the same 1 x 7 pin (12) and keeper bolt (13) as used before.
Especially on narrow center units, you will need to pre-assemble the leveler assembly
bracket (14) to the turnbuckle (15) or optional Hydraulic Cylinder (16) with the 1 x 9 Gr.8
hex bolt (17). Be sure to insert in direction shown. Snug tight with nylon locknut. Attach the
preassembled parts to the new front fold/support bracket (18) with a new 1 x 9 Gr.8 hex bolt (19)
and nylon lock nut (20), snug this bolt but do not torque. Connect the top of the leveler assembly
bracket (14) to the front of the existing level bar assembly (11) with a new 1 x 9 Gr.8 hex bolt
(21) and nylon lock nut. Snug but do not torque.
You are now ready to attach the new hitch frame (22) to the front of the disk. Use the
existing 1 ¼ x 8 Gr.8 bolts (23) with top lock nuts (24) to attach the hitch. Use the 1 ¼” SAE
flat washers (25) next to the ball joint to take out the slack in the connection All slack must be
removed for best connection wear life (add additional washers if necessary). Transfer the
existing tongue jack (26) from the old hitch to the new one.
Connect the level turnbuckle (15) or Hydraulic Cylinder (16) to the back of the hitch frame
(22) using a new 1 x 6 Gr.8 (special 1 ¾” thread length) hex bolt (27) and nylon lock nut. The
new hydraulic leveling cylinder requires two new longer hoses and a new straight adaptor fitting
between the lock valve (35) and the cylinder. Remove the two restrictor orifices (28) from the
old cylinder with a screwdriver and install into the new cylinder ports before attaching
hoses. (see schematic on page 14). Check Hydra Grip hose handles to verify that the extended
hose handle goes to the base end of the cylinder (see page 14).
Install the level gauge pointer (29) onto the leveler assembly bracket (14). Secure with 1 1/2”
machine washer and 3/16 x 2 cotter pin (30). Connect the level gauge link rod (31) between the
back of the hitch frame (22) and the level gauge pointer (29) as shown with two 1/8 x 1 cotter
pins and 3/8 flat washers.
Finish by re-installing the manual pak container (32), safety chain (33), spring hose loop (34)
and hydraulic hoses & hose clamps to the hitch frame (22) (see Figure 4).
Attach the original hitch clevis (36) to the new hitch frame (22) along with the safety chain
support (37) using two new 1 x 8 Gr.8 hex bolts (for narrow center disks) or 1 x 10 Gr.8 hex
bolts (for wide center disks)(38). Use the original 1” lock washers and hex nuts. Torque these
hex nuts until the hitch clevis is tight in the assembly.
After all parts are assembled, double check bolts and nuts for tightness and re-connect the
tractor to the disk harrow. Connect the hydraulic fold hoses first and cycle the unpinned front
fold cylinders (if equipped) two or three times and check for leaks. Extend the fold cylinders and
connect them to the wing frames with the hardware from before.
Connect the lift and hydraulic level hoses (if equipped) to the tractor. Lift the machine up all
the way. Slowly activate the hydraulic level cylinder in and out four or five times to purge the
air in the level cylinder, also check for leaks. Lower and raise the machine a couple of times
with the lift system to verify operation and check for leaks.
Finished with Update.
3/19/2008