Landoll 7812, Operator And Parts Manual, Page: 20 / 52

4-4 F-1127-0622
TABLE OF CONTENTS INDEX
Operating the HSL with GPS
Operating the HSL with the assistance of GPS can be
beneficial in several ways and is recommended.
The 7812 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 HSL with the assistance of GPS
guidance, set the swath width per the table.
• When the GPS is set up to correctly to reflect the
distance worked either side of center it becomes very
easy to see if the HSL is tracking straight by the
distance overlapped.
• When the GPS guidance is set correctly and the
HSL is tracking straight, there will be minimal overlap
on either side, and no skips.
• GPS guidance also helps out when turning narrower
units on the headland. It may become more efficient
when turning at higher speeds to not have to turn
back in, for what would be the next adjacent pass;
but instead work a rotation where one or two passes
are skipped to be completed later in the rotation.
Replacing the Disc Hub
Bearing
1. The replacement hub and bearing assembly is
available as a pre-assembled assembly (Landoll P/N
185742). Should you choose, the wear parts are also
available in a kit to re-build the disc hub.
Landoll Kit
210880 includes the essential wear parts to rebuild a
disc hub in the field.
• When rebuilding disc hubs in the field it is highly
recommended that you obtain a die, Landoll
218733, to assist in the proper assembly of the
components in the hub assembly. Landoll
Company, LLC., will not accept responsibility for,
or warranty hub assemblies re-built in the field.
2. When installing the hub assembly on the shank,
torque the flange top lock nut to approximately
200-250 foot pounds of torque immediately after
applying Loctite 271.
3. When replacing the disc blade on the disc hub, clean
the O-Ring groove and the surfaces between the hub
face and the correlating disc surface. Failure to clean
the surfaces mentioned above, can cause the disc
blade to loosen and cause water to infiltrate the
bearing area.
NOTE
Inadequate torquing of the disc hub (<120 ft/lb.) Flanged
Toplock Nut will cause premature bearing failure. Over
torquing can also lead to premature bearing failure.
Figure 4-3: Disc Hub Bearing
GPS Guidance
Model
Working
Width
GPS Swath
(When Turning
Right)
GPS Swath
(When Turning
Left)
7812-13 150" 144" (150 MAX) 144" (150 MAX)
O-Ring, 4" I.D. x 1/8"
(PN 202843)
Flanged Nut,
Toplock 1-8
(PN 174732)
1" Flat Washer
(PN 622-3511-010)
HSL Disc Hub
Assembly
(PN 185742)