Landoll 7822 Series Operator's Manual page 25

The wing based wheels and tires alone with the down
pressure settings are responsible for making the 7822
run level from side to side.
Operating Depths and
Adjustments for the Tilt
Control Operated HSL
The optimum working depth is considered to be 1-1/2 to
3-1/2 inches. The HSL can work on either side of this
range with good performance and results; but typically
the 1-1/2 to 3-1/2 inch depth range is the most efficient
work depth.
Working depth adjustments should always be made in
conjunction with considerations of operating speed.The
HSL can bury as much plant debris in a relatively shallow
working depth as conventional machines can at
considerable deeper operating depths because of the
mixing action inherent to the HSL if adaquate operating
speed is maintained.
The 7822 HSL has a single point depth control. It located
just to the left of center on the hitch,
Single Point
Depth Control
Wing Down Pressure
Manifold & Gauge
Operating the HSL with
GPS
Operating the HSL with the assistance of GPS can be
beneficial in several ways and is recommended.
The 7822 is designed to be symmetrical. It will work the
same distance both to the left and the right of center
when it is tracking straight.
• When operating the Landoll HSL with the assistance
of GPS guidance, set the swath width per the table to
the right.
TABLE OF CONTENTS
See Figure 4-7.
Tilt Control
Figure 4-7: Operating Depths and Adjustments
OPERATION & MAINTENANCE
• Every rotation of the control crank adjusts the
working depth by a ¼ inch, four (4) turns to an
inch of operating depth.
The tilt cylinder combined with the tilt control system,
control the operating depth of the rear row of disc units
relative to the front row of disc units (see the previous
section, "Front to Rear Adjustment with the Tilt
Controlled 7822 HSL," on page
control is a single point control.
While the depth control is a single point depth control, the
rear reels play a major role in the final performance of the
HSL. If the down pressure on the reels becomes
extensive it will have an adverse effect on the overall
system. If too much down pressure is applied to the rear
reels they will hold the rear row of disc units out of the
ground. This will cause the HSL to track to the left hand
side. Typically, when this is the case, the operator will
observe that the rear urethane spring in the draft cushion
assembly will be ballooned. Too much down pressure on
the rear reels can also lead to bouncing. On the other
hand, too little down pressure will cause the machine to
have decreased stability in the field. Too little down
pressure also tends to leave a less desirable field finish
and does not reconstitute the soil profile to an optimum
level.
Gps Guidance
Working
Model
(When Turning
Width
7822-15 180" (15')
7822-17 200" (16'8")
7822-20 240" (20')
7822-23 280" (23'4")
4-5). The 7822 tilt
Draft Cushion
Rear Reel/Roller Control
GPS Swath GPS Swath
(When
Right) Turning Left)
178 inches 178 inches
198 inches 198 inches
238 inches 238 inches
278 inches 278 inches
4-9