GREAT PLAINS 6321UC Adjustment Manual Download Page 3

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TLUS400C-0001A

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Hydraulic Depth Stop: 

The hydraulic depth stop will maintain 

constant depth every time the implement is raised and low-

ered. Adjust the per the following: 
1) Simply screw the depth stop handle in to run the implement 

shallower. Unscrewing the depth stop handle will allow for the 

implement to run deeper. One full turn of the depth stop handle 

is equivalent to 1/4” of working depth. 

Note: If after setting the 

depth stop, the detent on the tractor kicks out before the stop 

contacts the button of the depth stop, slow the tractor hydraulic 

flow down. Do not adjust the rebound valve without first con-

tacting the factory service representative. 

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Rear Attachment Settings
Spike Drag Settings: 

On the spike drag, start with 5 links 

hanging from the chain in drag arm bottom slot. (This is a start-

ing point for worst conditions). The cleaner the ground, the 

shorter the pull chain may be pulled up. 
On the spike drag, one of the links in the first row of angles is 

turned over to allow the trash to start flowing through the drag 

easier. Note: Make sure that the drag is never pulling off of the 

hang chains, if so, shorten the pull chains. 

Heavy Coil Tine Settings:

 The factory setting will have the 

spring pre-set at 3-3 1/2” of bolt left to adjust. To adjust the 

down pressure:
1) Loosen the jam nut (5) and screw the spring bolt (6) in to 

apply more down pressure on the drag, or adjust the bolt out to 

apply less down pressure.
2)Re-tighten the jam nut (5) to secure all adjustments.

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3) To change the angle of the coil tine, rotate the locking pin (7) 

and move the adjustment lever (8) forward or backwards. Mov-

ing the lever towards the rear of the machine makes the drag 

more aggressive while moving the lever towards the front of 

the machine will allow residue to flow through easier. 
The adjustment lever has four positions and will change the 

coil tines several degrees. 
4) Rotate the locking pin (7) back to its engaged position when 

the desired angle is achieved. 

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Reel Settings:

 If a reel is added to the back of the Ultra-

Chisel, adjust the amount of down pressure by either shorten-

ing the springs for less pressure or lengthening them for more 

pressure:

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