Landoll 6250 Disc, Operator'S Manual

Page: 75 / 94

OPERATION AND MAINTENANCE
4-11
Hitch Adjustment
1. It is important for the Disc to maintain a proper draft
line with the tractor to do a level job of discing. The
draft line will vary depending on soil conditions and
tractor drawbar height. The Disc is equipped with an
adjustable hitch to help insure a proper draft line with
the tractor.
2. Generally tractor drawbars greater than 17” tall will
require the hitch to be in the upper position. 17”
drawbars and below should be in the lower position.
Operating conditions may also influence the hitch
adjustment. The hitch is most commonly located in
the upper position.
3. A hitch adjustment that is too high will leave a center
furrow, as the front of the Disc will operate too deep.
A low hitch adjustment can cause a center ridge,
regardless of leveler setting.
IMPORTANT
Excessive down pressure with gauge wheels can
also create a center ridge regardless of hitch and
leveler settings.
Figure 4-14: Hitch Adjustment
4. To adjust the hitch (See Figure 4-14.) :
a. Lower the Disc to the ground.
b. Adjust the hydraulic leveler in or out until the
pressure is relieved on the leveling system
(See
“Leveling (Side to Side)” on page 4-8 and
“Leveling (Front-to-Rear)” on page 4-10).
c. Remove the 1-1/2-6 X 6 hex head cap screw and
hardware from the leveler ball joint link at the
center rear of the hitch weldment.
d. Loosen, but do not remove the bolts that pass
through the welded bushing at the outer rear
connections of the hitch.
e. Remove the bolt through the two hole clamp
plates (above or below) the rear connections of
the welded bushing
f. Vertically raise or lower the hitch to the desired
operating position.
g. Reinstall the bolt through the two-hole clamp
plates to secure the hitch in the new position.
h. Retighten all hitch bolts.
i. Install the bolt in the leveler ball joint link in the
new position at the rear of the hitch and
retighten.
IMPORTANT
When the hitch is in the lower position, the leveler
ball joint link will be in the upper mounting hole at
the rear of the tongue. If the hitch is in the raised
mounting position, the leveler ball joint link will be in
the lower hole at the rear of the tongue.