Landoll 7831, Operator'S Manual

Page: 21 / 36

OPERATION AND MAINTENANCE
4-5
Synchronizing and Leveling
Front Gauge Points
The front gauge is comprised of the main tires and
wheels on the hitch frame and the gauge tires and
wheels on the wing frames.
IMPORTANT
Make sure the front gauges are synchronized and
leveled to enable the HSL to work the soil to an even
depth of cut.
The HSL has been adjusted prior to being shipped, but it
is appropriate to re-check it. Please consult the following
instructions and diagrams to check, or to re-set the
synchronization and levelness of the front gauges should
that become necessary
(See Figure 4-2.)
NOTE
You will need the open end 2-5/8” wrench stored just
inside of the hitch left side brace tube.
Follow the steps below when setting the front gauges.
1. Retract the four (4) front gauge cylinders completely.
There are two (2) cylinders on the main hitch and one
(1) on each of the two (2) wing frames.
a. Check that all of the polished chrome of the
cylinder rods is retracted into the cylinder body.
b. This action will require that the front gauge depth
control (on the hitch frame) is adjusted to its most
extreme depth condition.
c. If the cylinder rods are for some reason not
completely retracted, then fully extend the front
gauge cylinders until they are fully extended.
Continue extending them for an additional ten
(10) seconds after they appear to be fully
extended. This action will re-synchronize all of
the gauge cylinders. It is a good practice to
re-synchronize the front gauge cylinders once or
twice daily by extending them completely and
holding the circuit control in the extend position
for an additional five (5) to ten (10) seconds.
2. With the four (4) front gauge point cylinders
completely retracted, place a long straight edge
across the top of one of the wing frames with one
end of the straight edge extending forward over the
spindle sleeve that houses the wing gauge wheel
spindles.
a. For a 7831-25 or a 7831-30 with 380/55R gauge
wheel tires, adjust the gauge wheel arm until the
top of the sleeve is 10-1/2” below the top of the
wing frame
(See Figure 4-2.)
b. For a 7831-35 or a 7831-40 with 32/1550 x 16.5
SL Galaxy gauge wheel tires, adjust the gauge
wheel arm until the top of the sleeve is 10” below
the top of the wing frame.
3. Repeat this procedure for the other side wing of the
HSL.
Synchronizing Rear Gauge
Cylinders
The rear gauge, like the front gauge, operates with a
master and slave cylinder system.
1. Synchronize the master and slave cylinders by fully
extending the cylinders in the circuit.
2. Maintain the hydraulic controls in the extend mode for
an additional ten to twenty seconds.
IMPORTANT
It is highly recommended the operator re-set the
hydraulic cylinders that control both the front and
rear depth gauges periodically while operating the
HSL.
3. Once the master / slave system is re-set, return to
the original depth setting. To assure a consistent
working depth this practice should be carried out
several times per day.
Figure 4-2: Synchronize & Level Front Gauge Points
10-1/2