Hillco 3700S, Руководство оператора, Страница: 22 / 40

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LEVEL LIMIT STOPS
On the Model 3700S Leveling System a Level Limiting Spacer Kit can be clamped on the
main leveling cylinders to mechanically stop leveling if the limit switches were to fail. To
determine how many spacers are needed to create mechanical stops follow these steps:
1. Park the combine on level ground and apply the parking brake.
2. Raise the feeder spout and drop the header lift cylinder safety stop.
3. Place the auto/manual-leveling switch in the manual position and lean the combine
to the left until the limit switch that was set previously stops leveling.
4. Shut off the machine and measure the distance between the packing gland on the
rod end of the cylinder and the ring that is welded to the rod end.
5. Write down this dimension and repeat the process for the right side. (Both sides
must be measured due to the fact that the combine may level further one direction
than the other.)
6. The dimensions obtained will determine how many spacers are needed.
There is no additional charge for the level limit stops (Call Hillco with dimensions to
order).
If Level Limit Stops are used be sure that the limit switches are set to stop
leveling before the level limit stops make contact. Damage to the cylinders or
other leveling system components may occur if limit switches aren’t set
properly.
LEVELING CONTROLLER FUNCTION
The Hillco Model 3700S Leveling System is equipped with a proportional leveling system with
manual control and automatic with manual override control. The clinometer, located in the
control box, monitors changes in slope and corrects the position of the combine’s chassis
using proportional leveling. The clinometer maintains leveling accuracy to +/- 1/10th of a
degree by sending the leveling signal to the proportional leveling control valve on the
manifold. As the combine reaches higher degrees of being out of level, the clinometer sends
more voltage to the directional control valve’s coil and pulls the spool open further to allow oil
to flow faster and speed up leveling. As the combine gets closer to +/- 1/10th of a degree out
of level, less voltage is sent to the coil to slow leveling.
Limit
Switches
Leveling
Control Box