Operating Speed - Landoll 7822 Series Operator's Manual

OPERATION & MAINTENANCE
Figure 4-6: Adjusting the Blade Leveler

Operating Speed

The operating speed is very significant to the
performance of the HSL. It requires some speed to make
it work correctly and efficiently.
• The minimum operating speed should be
approximately 7-1/2 to 8 miles per hour unless the
goal is to minimize the percent of crop residue being
buried.
• Maximum operating speed recommended is
approximately 12 miles per hour.
The amount of crop residue that is buried is a function of
the operating speed.
• The higher the speed of operation of the HSL, the
greater the percent of crop residue that will be buried.
• The slower the speed of operation of the HSL, the
greater the percentage of crop residue left on the
surface.
When operating the HSL, higher speed can be a
substitute for operating deeper. On the other hand, in
some cases, it is desirable to reduce the percentage of
crop residue buried. In such cases the operator will need
to reduce the speed of operation. Typically the 8 to 10
miles per hour window of operating speed will yield the
most desirable results.
4-8
TABLE OF CONTENTS
Wing Hydraulic Down
Typical
Pressure
Spacing
1-1/4"
7822 Hydraulic Wing Down Pressure Settings
Model
7822-17
7822-20
7822-23
The 7822 HSL comes equipped with hydraulic wing down
pressure incorporated in the wing fold system.
• Except the 7822-15 which unfolds into a rigid
configuration.
The hydraulic wing down pressure transfers weight from
the heavier center section out into the outward to the
wing tips. The wing down pressure system assures that
the active down force on each disc unit is equal. The
hydraulic wing down pressure manifold is located on the
left side of the hitch, just inside the frame.
The hydraulic wing down pressure system needs to be
run continuously when the 7822 HSL is working in the
field.
• It is recommended that the wing fold circuit (yellow
circuit) be connected to a tractor circuit in which the
flow has been reduced to approximately twenty
percent (20%) of its full capacity.
• Turning the flow volume down will supply an
adequate flow to the down pressure system and
simultaneously prevent excessive buildup of heat or
loss of power.
• The down side to turning the flow down is that the
fold and unfold functions will be slowed down.
The wing down pressure is a function of geometry and a
"set it and forget it" setting. The design intent of the
hydraulic wing down pressure is to evenly distribute the
weight of the heavier center section evenly across the
entire machine. For that reason adjusting the down
pressure is not recommended. It has been correctly set
at the factory. The pressure setting is adjustable;
however, the maximum pressure should never exceed
700 psi. If adjustment becomes necessary, loosen the
lock nut on the "PRV" cartridge and adjust it clockwise for
higher pressure and counter clockwise for lower
pressure.
The wing based gauge wheels and tires may need to be
adjusted so that the 7822 HSL operates level from side to
side. The wing gauge wheels and tires are connected to
the main hitch wheels and tires through a master/slave
hydraulic system. The front guage wheels are controlled
through a single point control.
Hydraulic Wing Down Pressure Settings
200 - 300 psi
300 - 500 psi
500 - 700 psi
F-1045-0819