A hydraulic oil leak on used machinery can range from a small seep around a fitting to a high-pressure hose failure that needs immediate repair. The important question is not simply whether oil is visible. A buyer needs to identify where the oil starts, whether the leak becomes worse during operation, and which component may require repair. Begin with the machine parked safely on a dry surface. Inspect the hydraulic tank, pumps, valves, hoses, fittings, cylinders, cooler lines and hydraulic motors before operation. Then run the machine and recheck the same areas after the hydraulic system reaches normal working temperature. ...
