Landoll 7831, Operator'S Manual

Page: 22 / 36

4-6 F-801-1115 Edition
OPERATION AND MAINTENANCE
Front to Rear Adjustment
The HSL is most effective when it runs or tracks straight
behind the tractor. Only when the HSL is consistently
tracking straight, can the correct lateral adjustment of the
rear gangs be determined.
(See Figure 4-3 and Figure 4-4) for lateral adjustment of
the rear gangs.
• When the HSL is tracking straight, all the blades have
the correct angles of attack, relative to the soil.
• When the HSL is tracking straight, the relationship
between the front and rear blades remains consistent.
• Tracking straight behind the tractor and running level
are not one and the same for the HSL. It is not
un-common to see the HSL go through the field with
the front of the frame slightly lower than the rear of the
frame. This is because the front blades do more work
in breaking up the soil. Therefore, the rotation of the
shanks on their torsion mounts in the front is slightly
more than those in the rear. The resulting scenario is
that the HSL may appear to run a little downhill.
The front row units would have the HSL track to the
tractors right side if they were dominate. In the same way
the rear row units would have the HSL track to the left
side of the tractor if they were dominate.
1. If the HSL tracks to the left side of the tractor, the
operator should either raise the rear of the machine
slightly or lower the front.
2. If the HSL is tracking to the right side of the tractor,
the operator should slightly lower the rear or raise the
front. Tracking straight is a pre-requisite to fine tune
the lateral adjustment of the gang assemblies.
It is always desirable to start the HSL at a shallow depth
and then subsequently adjust it from that point. The
amount of plant residue buried is a function of machine
depth and speed. Operating the HSL at greater depths
will naturally bury more plant residue. However,
increasing the speed of the HSL will also bury more plant
residue. Therefore, if operating at greater depths comes
at the sacrifice of speed, it may not be the most desirable
choice to run deeper.
NOTE
The 7831 HSL is most effective at speeds of eight miles
per hour or greater. If field conditions permit, a speed of
nine or ten miles per hour is very desirable.
NOTE
If plugging occurs reduce the working depth until the
issue has been remedied. The HSL can produce a
“blacker” field in just a few inches of working depth.
Lateral Adjustment of Rear
Gang Assemblies
The front row of disc blades are fixed in position laterally.
They are designed to only rotate in place around their
torsion mounts.
• The rear row of blades are mounted on gangbar
weldments which can be adjusted laterally. The
gangbars are secured with 3/4-10 carriage bolts
extending through slotted brackets. The gang
assemblies can be adjusted to the right or left several
inches. The gang bar adjustment brackets, (Landoll
Part Numbers 187631 and 195279) are designed to
simplify adjusting the gangs laterally.
• The HSL is initially set at the factory to a setting of
8-5/8 inches from the outside of the center section left
side plate to the outer edge of the left rear disc unit
clamp.
(See Figure 4-3) for product purchased with
the compound angled shank option, and 10-1/8 for
that with the vertical shank option.
1. When adjusting the rear disc gangs laterally, it is best
to set the center gang first and then sequentially set
the rear gangs on the wing assemblies secondarily.
2. When adjusting the center section rear gang
assembly, it may be necessary to first adjust the wing
gang assembly in the direction the adjustment is
being made.
3. While the typical row unit spacing is 10”, the spacing
between the row units at the fold break is
approximately 10-3/8”. Once the center section rear
gang assembly is adjusted and secured in place, the
wing
rear gang assemblies should be set relative to
the center section rear gang assembly.
4. The wing rear gang assemblies should be adjusted
so the first row unit adjacent to the nearest center
section rear row unit is 10-3/8” on center from it
(See Figure 4-4.)