Great-plains DVN8324 Operator Manual User Manual download pdf (Page 43)

Great Plains Manufacturing, Inc. Operating Instructions 39

11/25/2013 550-466M

Refer to Figure 31

Field Operation of Disc Gangs

4. Adjust the disc or coulter gangs to run 1.27-2.54 cm

(0.5-1 in) shallower than the cultivator sweeps by using

the gang cylinders. The pointer on the gauge should

read +1/2” to +1”. Running the disc gangs slightly above

the sweeps allows the sweeps to work in ﬁrm ground

which improves trash ﬂow and incorporation as well as

leaving a smoother, more level seed bed.

5. Do not run the disc or coulter gangs in the RED ZONE.

Running the disc gangs too deep will cause plugging of

trash as well as excessive wear on the gangs, gang

springs and Discovator frame. Running disc gangs too

deep may also tend to hold the front of the entire

machine out of the ground. (The disc gangs should only

be run in the RED ZONE when using 45.7 cm (18 in)

blades that are nearing the end of their wear life).

6. You are ready to operate the machine in the ﬁeld at this

point. You should have someone observe the machine

during operation for levelness, front to rear and side to

side. When you lower the machine to the desired work-

ing depth, set the cylinder stop at the front of the front of

the unit to maintain a constant depth after raising and

lowering.

7. Make any ﬁne tuning adjustments on the leveling of the

machine.

Scraper Settings

The scrapers are set at the factory but should be

checked periodically and may need re-adjusted as fol-

lows:

• Disc scrapers will need the bolts (rigid scraper) or u-

bolts (spring scraper) loosened up and slid into blade

until they just touch the blade, and torqued to specs.

• Coulter scrapers u-bolts will need loosened and scrap-

ers centered between coulter blades, and torqued to

specs.

Figure 31

Disc Gang Field Operation

41600

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Great-plains DVN8324 Operator Manual User Manual Page 43