Landoll 7822 Series Operator's Manual page 21

Synchronizing Rear
Gauge/Finishing Feature
Cylinders
The rear gauge/finishing feature is operated with a
master and slave cylinder system.
The rear reels/rollers can limit the depth of the rear
of the 7822 if they are set too low. The rear
reels/rollers need to be set on the ground firmly
enough to stabilize the HSL and reconstitute the
worked soil but not to the point where the rear of the
machine is held out of the ground.
1. Synchronize the master and slave cylinders by fully
extending the cylinders of this circuit (black circuit).
2. Maintain the hydraulic controls in the extend mode for
an additional five (5) to ten (10) seconds.
IMPORTANT
It is highly recommended that the operator re-set the
hydraulic cylinders that control both the front depth
gauges as well as the rear finishing feature once or
twice daily while operating the HSL.
Front to Rear Adjustment
with the Tilt Controlled 7822
HSL
NOTE
The 7822 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, than
a convectional machine at approximately twice the depth.
The tilt controlled 7822 HSL has only one adjustment for
the front to rear adjustment (tilt control).
The tilt control is an adjustable mechanical control that
stops the extension of the tilt cylinder (the large cylinder
on the hitch) at the discretion of the operator.
The adjustment for the tilt control is on the left hand side
of the hitch assembly. The markings on the adjustment
tube call out the "rear gang" and has arrows indicating
which direction the rear gang will go relative to the front
gang. "A" is the deepest setting while "G" is the
shallowest setting. Typically start out in the mid-range
TABLE OF CONTENTS
and then adjust the control from that point until the HSL
tracks straight behind the tractor.
Figure 4-3: Tilt Control Adjustment
The front row disc units would cause the HSL to track to
the tractors right hand side if they were dominant. In the
same way the rear disc units would cause the HSL to
track to the tractors left hand side if they were dominant.
• If the HSL is tracking to the left side of the tractor the
operator will need to raise the rear gang relative to
the front gang because the rear gang is dominating,
and the system is not in equilibrium. The rear gang is
raised by rotating the tilt control hand crank counter
clockwise. The tilt cylinder will need to be retracted a
bit to make this adjustment.
• If the HSL is tracking to the right side of the tractor
the operator will need to lower the rear gang relative
to the front gang because the front gang is
dominating, and the system is not in equilibrium. The
rear gang is lowered by rotating the tilt control hand
crank clockwise.
The tilt control has very high resolution. Each turn of the
adjustment crank will move the rear gang about 3/32 inch
(.092) more than it moves the front gang in a given
direction. Eleven (11) rounds will move the back gang
one (1) inch more in a given direction than it will the front
gang.
• Changing the depth of operation will not
typically require any adjustment of the tilt control.
• Changing the amount of down pressure on the
rear reels may require adjusting the tilt control to
regain true tracking.
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. Running deeper may not be the
most desirable choice.
NOTE
The 7822 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.
OPERATION & MAINTENANCE
4-5