How much grease in wheel bearings

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Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. The cookie is used to calculate visitor, session, campaign data and keep track of site usage for the site's analytics report. When the ideal lubrication level is reached, the dB microvolts value returns to its normal level.

This is perfectly audible in the headphones, in the reproduction of the dynamic signal and visible on the screen of the SDT device. The second mistake we must avoid is adding too much, or not enough grease. Too much grease builds pressure, pushing the rolling elements through the fluid film and against the outer race. The bearing now has to work much harder to push the rolling elements through a mud bog of grease. The increased friction and pressure from too much grease raises the temperature inside the bearing.

Excess heat could decrease the effectiveness of the lubricant causing the oil to separate from the thickener. Not adding enough grease has the same life-shortening effect. How do we know when just the right amount of grease has been added? By monitoring the friction level with ultrasound as new grease is applied — slowly, one shot at a time.

Listen to the bearing and measure the drop in friction as the grease flows in to the bearing. As the decibel level approaches a minimum value and stabilizes pay close attention.

Add single shots. Should the decibel level begin to increase slightly, stop! The job is done. Like any job there is a right way and a wrong way to do things. Simply listening to a bearing with an ultrasound device that gives no measurement feedback is a recipe for disaster.

The audible feedback alone is too subjective to draw any comparative conclusions. No two people hear the same and there is no way to remember what the bearing sounded like a month ago. The third mistake is depending solely on subjective ultrasound noise when precise quantifiable data is available. Therefore always use an ultrasound instrument with digital decibel metering. Better still, use a device that provides multiple condition indicators.

Maximum RMS and Peak dB measurements indicate alarm levels and greasing intervals while Ultrasonic Crest Factor provides insight about the bearing condition in relation to its lubricant. Crest Factor helps us differentiate between bearings that need grease and bearings that need to be replaced. Ultrasound assisted lubrication of plant assets offers significant benefits that calendar-based lubrication cannot.

Lubrication serves a primary purpose, which is to create a thin layer of lubricant between rolling and sliding elements that reduces friction. So it makes sense that the best way to determine the lubrication requirement of a machine is to monitor friction levels — not time in service. Optimizing lubrication of plant machinery with ultrasound will result in a significant reduction in grease consumption. Having an ultrasound programme in place will help create a better culture involving cleaner storage practices, sampling, and avoiding mixing greases.

Machines that are properly lubricated require less energy to run. Imagine that reducing the amount of money spent on grease will actually lead to lower energy bills. Machines that consume less electricity run cooler and machines that run cooler have longer life cycles. How much grease when packing wheel bearings? Asked 7 years, 6 months ago.

Active 7 years, 6 months ago. Viewed 19k times. Improve this question. Aren't Sportages front wheel drive vehicles with four wheel being optional? Edmund's seems to think so, as well that was how it was when I was selling them in the late '90s. I honestly was surprised too the first time I went to work on it after buying it a few years ago. Add a comment. Active Oldest Votes. Improve this answer. Captain Kenpachi Captain Kenpachi 8, 3 3 gold badges 23 23 silver badges 42 42 bronze badges.

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