Hydraulic leak detection system
AssigneeDeere & Company
InventorsPAUL R. HEIDE, BRADLEY P. ALDRIDGE, BRENT G. RINHOLM, DAVID A. STRAKA
Life of this patent
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Abstract
A hydraulic leak detection system includes a leak detection switch responsive to a level of hydraulic fluid in a tank used by a hydraulic mowing circuit and a lift and lower circuit of a grass mowing machine. The system includes a controller that activates a warning indicator if the leak detection switch indicates the level of hydraulic fluid in the tank is low, but allows the hydraulic mowing circuit and the lift and lower circuit to continue operating until the lift and lower circuit reaches a fully raised position. A solenoid valve may control the level of hydraulic fluid in the tank based on temperature of the hydraulic fluid.
Claims13
A hydraulic leak detection system, comprising:
- a vehicle controller electrically connected to a leak detection switch, a warning device, a hydraulic mowing circuit, and a lift and lower circuit for a plurality of grass cutting units;
- the vehicle controller receiving a signal if the leak detection switch detects a hydraulic fluid level is low, activating the warning device in response to the signal, allowing operation of the hydraulic mowing circuit until the plurality of grass cutting units are fully raised by the lift and lower circuit, and then stopping the hydraulic mowing circuit and blocking the lift and lower circuit from lowering the grass cutting units.
A hydraulic leak detection system, comprising:
- a leak detection switch in an auxiliary hydraulic fluid tank of a grass mowing machine having a plurality of cutting units operated by a hydraulic mowing circuit and a lift and lower circuit;
- the hydraulic mowing circuit and the lift and lower circuit being disabled when the plurality of cutting units are fully raised if the leak detection switch senses a low level of hydraulic fluid in the auxiliary hydraulic fluid tank.
A hydraulic leak detection system, comprising:
- a leak detection switch responsive to a level of hydraulic fluid in a tank used by a hydraulic mowing circuit and a lift and lower circuit of a grass mowing machine;
- and
- a controller connected to the leak detection switch, a warning indicator, the hydraulic mowing circuit, and the lift and lower circuit;
- the controller activating the warning indicator if the leak detection switch indicates the level of hydraulic fluid in the tank is low, and allowing the hydraulic mowing circuit and the lift and lower circuit to continue operating after the leak detection switch indicates the level of hydraulic fluid in the tank is low until the lift and lower circuit reaches a fully raised position.
Dependencies are inferred from the claim text.