Failure diagnostic apparatus for hydraulic equipment

Abstract

Failure diagnosis of hydraulic equipment related to a control of a swash plate of a swash plate type variable displacement hydraulic pump can be easily performed in a short time. For this purpose, the failure diagnostic apparatus includes a plurality of sensors which respectively detect operation characteristic values of the hydraulic equipment, a controller (40), which inputs therein the detection values detected by the plurality of sensors, and which outputs a signal of occurrence of an abnormality of hydraulic equipment which is determined as abnormal, when compares failure determination reference values previously stored according to the each hydraulic equipment, and the detection values, and determines them as abnormal, and a monitor device (41) which receives the signal of occurrence of the abnormality of the hydraulic equipment which is determined as abnormal, and gives notice by at least one of a display and a sound.

Dependencies are inferred from the claim text.