![]() ![]() The temperature at which this occurs is dependent on the viscosity grade of the fluid in the system and can be well below 180☏. Fluid temperature is too high when viscosity falls below the optimum value for the system’s components. This means that the operation of any hydraulic system at temperatures above 180☏ is detrimental and should be avoided. Flexible intake lines are prone to collapsing with age therefore, replace old or suspect intake lines.įluid temperatures above 180☏ (82☌) can damage seals and accelerate degradation of the fluid. ![]() The intake line between the reservoir and pump should not be restricted. This type of isolation device is prone to vibrating closed. If a gate-type isolation valve is fitted to the intake line, it must be fully open. If the pump has an inlet strainer or filter, it is important for it not to become clogged. A clogged inlet strainer or restricted intake line will cause the fluid in the intake line to vaporize. While cavitation can occur just about anywhere within a hydraulic circuit, it commonly occurs at the pump. In extreme cases, cavitation can cause mechanical failure of system components. Cavitation causes metal erosion, which damages hydraulic components and contaminates the fluid. The consequences of cavitation in a hydraulic system can be serious. ![]() This results in the formation of vapor cavities within the fluid, which implode when compressed, causing a characteristic knocking noise. ![]() This causes the absolute pressure in that part of the circuit to fall below the vapor pressure of the hydraulic fluid. Check the condition of the pump shaft seal and if it is leaking, replace it.Ĭavitation occurs when the volume of fluid demanded by any part of a hydraulic circuit exceeds the volume of fluid being supplied. In some systems, air can enter the pump through its shaft seal. If the fluid level in the reservoir is low, a vortex can develop, allowing air to enter the pump intake.Ĭheck the fluid level in the reservoir, and if low, fill to the correct level. Flexible intake lines can become porous with age therefore, replace old or suspect intake lines. For this reason, it is important to make sure pump intake lines are in good condition and all clamps and fittings are tight. Aeration accelerates degradation of the fluid and causes damage to system components through loss of lubrication, overheating and burning of seals.Īir usually enters the hydraulic system through the pump’s inlet. Other symptoms include foaming of the fluid and erratic actuator movement. Air in the hydraulic fluid makes an alarming banging or knocking noise when it compresses and decompresses, as it circulates through the system. Aeration occurs when air contaminates the hydraulic fluid. These symptoms are abnormal noise, high fluid temperature and slow operation.Ībnormal noise in hydraulic systems is often caused by aeration or cavitation. In the case of hydraulic systems, there are three easily detectable symptoms that give early warning of root cause conditions. If your equipment is showing any of the above signs, you should make it a priority to have a mechanic take a look.Īre you interested in learning more about automatic transmission services? Join us on Facebook to see how our team can help you.Proactive maintenance emphasizes the routine detection and correction of root cause conditions that would otherwise lead to equipment failure. It’s critical to service your equipment regularly to keep it running smoothly. It can result in a smoking vehicle and irreplaceable damage. Pro Tip: A burning smell coming from your industrial vehicle should never be ignored. Replace the filter and fluid immediately to avoid any serious damage. Never ignore a burning smell that’s coming from your equipment! This could mean that your filter isn’t doing its job properly and contaminants are blocking the filter. If you notice any oil on the ground where your equipment was parked, take note and have it serviced as soon as possible. Leaking transmission fluid is another sign that you need a new filter, or it could mean you need another repair entirely. Any odd noises such as high-pitched screeching or gears grinding mean that you need to get your vehicle serviced. If you hear a rattling sound, that could mean loose debris are blocking the filter. It’s never a good sign if your industrial vehicle is making weird noises. ![]()
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