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Hydraulic systems can be complicated and may cause diagnostic confusion and loss of many thousands of dollars when system problems occur. If the hydraulic system can be diagnosed quickly production can resume, reducing production losses to a minimum. Air leaking into system : Be sure the oil reservoir is filled to the normal level and the oil intake is below the surface of the oil. Check pump packing, pipe and tubing connections, and all other points where air might leak into the system. Air bubbles in intake oil If the oil level is low or the return line to the reservoir is installed above oil level, air bubbles will form in the oil reservoir. Check oil level and return-line position. Loose or worn pump parts : Check the manufacturer’s maintenance instructions first. Tightening every nut in sight may not be the way to stop leakage. Look for worn gaskets and packings; replace if necessary. There is usually no way to compensate for wear in a part; it is always better to replace it. Oil may be of improper grade or quality. PROBLEM: OVERHEATING, Oil viscosity too high. Check oil recommendation. If you’re not sure of the oil viscosity in the system, it may be worth your while to drain the system and install oil of proper viscosity. Cold temperature conditions may cause oil of proper viscosity for “working temperature” to thicken too much on the way to the pump. In this case, use of oil with higher viscosity index may cure trouble. PUMP NOT PUMPING. Pump shaft turning in wrong direction : Shut down immediately. Some types of pumps can turn in either direction without causing damage; others are designed to turn in one direction only . Check belts, pulleys, gears, and motor connections. Reversed leads on 3-phase motors are the most common cause of incorrect rotation.
Tags : check oil level, trouble shooting guide, 3 phase motors, oil viscosity, viscosity index, pump packing, air bubbles, production losses, motor connections, tubing connections, oil reservoir, line position, system trouble, cold temperature, quality problem
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