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Hydraulic Pump Failure Analysis and Why It’s Essential

Hydraulic Component Manufacturers and Warranty Claims

Hydraulic component manufacturers are notorious for the smoke and mirrors they use to deny warranty claims. When a hydraulic component fails prematurely, what IS needed is accurate information, i.e. better answers than ‘it’s contamination’.

A Client's Experience with Radial Piston Motor Failures

A client suffered a series of failures involving a particular brand of radial piston motor. The motor manufacturer initially blamed the failures on contamination, denying the warranty claim. The client, after studying hydraulics resources, conducted his own failure analysis and concluded that the failures were unrelated to oil cleanliness. The manufacturer then agreed with his analysis but attributed the failures to a flaw in the machine’s hydraulic circuit.

The Problem with Standard Excuses

The customer had a right to be upset with the motor manufacturer because contamination is the standard reason given by most pump and motor manufacturers to avoid warranty claims. In this case, the circuit problem was not discovered until the customer conducted his own failure analysis after subsequent failures had occurred, costing him a six-figure sum.

The Importance of Accurate Failure Analysis

Hydraulics users need accurate information and better answers when things go wrong. Inaccurate or incomplete failure analysis can be very costly.