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ELECTRICAL SETTINGS
LIMIT SWITCHES
The leveling system is equipped with left and right level limit switches that disable the
automatic leveling when the combine reaches its maximum leveling capability in either
direction. These switches are preset by the installer at either the maximum leveling capability
of the combine or in some cases at a lesser angle to provide for proper tire clearance. It is
important to note that in the event of a limit switch failure the combine may continue to level
to its maximum capability. Care should be taken to make sure tire clearances are adequate
in the maximum level position to prevent damage to the tire or chassis in the event that a limit
switch failure should occur. The operator should daily level the combine to its maximum level
position, with the bulk tank empty, using the manual leveling switch to insure the limit
switches are operational.
IMPORTANT:
To set the limit switches, first park the combine on level ground and block the tires. Then
raise the feeder spout and lock the feeder lift cylinder. Place the leveling system in the
Manual Leveling mode (Auto Leveling Indicator Light not lit). Using the Manual Left/Right
Leveling Switch, lean the combine to the left to maximum level of the cylinders or to the
maximum point that there is no sheet metal to tire interference. It may be a good practice
to level a small distance, stop and check for clearance issues before continuing. Next, turn
on the parking brake and shut down the machine. The limit switches are located on each
side of the control box near the main pivot pin. Align the limit switch actuator bracket so
that it is aligned with the left limit switch. Adjust the left limit switch actuator bolt one turn
past the point where you can hear the contacts on the limit switch snap. Repeat this
process for the right limit switch.
MECHANICAL ADJUSTMENTS
WIDTH – Slope MODEL 2970H TREAD Restrictions
The Model 2970H Leveling System is designed around a main undercarriage length of
114.5" or 122.5". The 114.5" undercarriage is designed for use with dual tire
packages where 120-180" tread spacing is preferred for 30" rows. Use of the 114.5"
undercarriage with duals will limit the leveling capability of the combine from 27% to
23%. The 122.5" undercarriage was designed to move the dual tires outward and
allow for the maximum leveling capability of the combine or 27%. The final drives can
be mounted directly to the 114.5" and 122.5" undercarriages.
With certain tire selections mechanical cylinder stops can be
purchased from Hillco to prevent damage to the combines side panels
in the event a limit switch or leveling valve malfunctions.
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