Great Plains 7552 Series VII Operator Manual - Manual (Page 102)

Section 5: Operating and Maintenance
Table of Contents ► Great Plains Mfg., Inc.
Series VII 6326-7552 Discovator 550-221M 1/19/2006
98
Operating and Maintenance
Prior to Going to the Field:
1. IMPORTANT!! If you have not thoroughly
read and understood the safety section at the
front of this manual, do so at this time. DO
NOT proceed without fully understanding the
safety considerations of this machine.
2. Make sure your tractor horsepower matches
the implement you are pulling. This is
important so the implement can do the best
possible job.
3. Hitch the tractor to the Discovator using the
block or yoke clevis determined by the tractor
drawbar. Use the correct size pin for clevis or
block. Raise any 3-pt arms and/or hitch
attachments to its fully raised position to
clear implement.
4. For TWO-WHEEL DRIVE and MFWD
tractors, pin drawbar in fixed center position
for field and transport. For FOUR-WHEEL
DRIVE and TRAC-DRIVE tractors, leave
one hole clearance on each side of
drawbar for field position, hitch damage
may occur if pinned solid. Pin in center
position for transport to maintain
maximum steering control.
5. Clean all hydraulic couplings and connect to
tractor. Each hydraulic coupling has a colored
handle on it and is marked with a cylinder,
either extending or retracting.
6. If machine is folded, remove the transport pins
from the wing stops. (DO NOT remove pins if
the wing is leaning against the pins or putting
pressure on the pins. Use the hydraulics to
pull the wings in completely before unpinning
them.) Once the pins are removed, slowly
unfold the unit. Make sure no one is under
the wings during the unfolding process.
Check again for hydraulic leaks and watch
that hoses do not get pinched in hinges, wings
stops, etc.
7. After the machine is completely unfolded,
raise and lower the Discovator several times
to purge air from the hydraulic system. Again
check for hydraulic leaks and tighten or
replace if necessary.
8. Check safety chain hookup. Make sure all
warning lights are hooked up and functioning
correctly.
9. Check the tire pressure for proper inflation
and check the tightness of the lug bolts and
lug nuts. See tire inflation chart in the
appendix section of this manual.
10. Check for any bolts that may need tightened
or retightened. Grease all the hinge points.
The hubs come pre-greased and will not need
more grease at this time.
11. Put transport lock in place and refold the
machine slowly. Put wing stop pins in place.
Always use the transport pins when moving
from field to field. You are now ready to go to
the field.
First Time Machine Setup and Adjustments:
1. Pre-leveling of machine can be done on a
concrete slab or good level surface. Lower
machine so sweeps are 2-3” off of ground on
the center frame. Adjust the turnbuckle
(Figure 1) at the front of machine to level it
from front to back. (Shorten to bring front
down, extend to bring front up.) Level
machine with the front row shanks just slightly
deeper or lower than the back.
Figure 1