Landoll 7822 Series Operator's Manual page 26

OPERATION & MAINTENANCE
• 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
Landoll 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.
Turning On the Headland
The recommended turning procedure for the 7822 HSL
on the headland is to tilt the rear of the machine upward
(red circuit), so that the weight of the entire machine is
riding on the front gauge wheels and tires.
1. Tilt the rear up only far enough that all of the blades
disengage the dirt. Tilting the HSL much over ten
(10) to fifteen (15) degrees while turning on the
headland exposes the wing fold cylinders and the
machine at large, to possible damage as well as
lengthens the time it takes to turn around.
2. Tilt the HSL rear up only enough to get the blades out
of the dirt. Setting the tilt up on a timer can be
beneficial. Once the turn is completed lower the HSL
back into the field by reversing the tilt cylinder (red
circuit) until its extension is terminated by the tilt
control valve.
4-10
TABLE OF CONTENTS
Replacing the Disc Hub
Bearing
1. The replacement hub and bearing assembly is
available as a pre-assembled assembly (Landoll P/N
210880). Should you choose, the wear parts are also
available in a kit to re-build the disc hub. Landoll kit
219945 includes the essential wear parts to rebuild a
disc hub 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
top lock nut will cause premature bearing failure. Over
torquing can also lead to premature bearing failure.
O-Ring, 4" I.D. x 1/8"
(PN 202843)
HSL Disc Hub Assembly
(PN 185742)
Figure 4-8: Disc Hub Bearing
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
Corporation will not accept responsibility for, or
warranty hub assemblies re-built in the field.
Flanged Nut, Toplock 1-8
1" Flat Washer
(PN 622-3511-010)
(PN 174732)
F-1045-0819