Greasing bearingswhile running

Greasing the bearing cavity with the correct calculated volume of grease while slowly adding each shot to minimize excessive pressure build-up.

Bearing grease SKF

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When it comes to regreasing bearings, more is not always the better option and actually can be a costly mistake. Instead, greasing should be set on a frequency with proper calculations used to determine the amount of grease needed at each relubrication. The determining factor for the amount required is based on the dimensions of the bearing or the bearing housing.

Overgreasing can lead to high operating temperatures, collapsed seals and in the case of greased electric motors, energy loss and failures. The best ways to avoid these problems are to establish a maintenance program, use calculations to determine the correct lubricant amount and frequency of relubrication, and utilize feedback instruments.

After you have determined the correct volume, it’s time to establish the proper frequency. There are several methods for estimating a regreasing frequency, including multiple calculators, tables and charts. Use our handy regreasing volume and frequency calculator for help. The major factors in determining frequency are load, operation time, type of bearing, speed, temperature and environment.

Any of you guys have a CR seal interchange book?. I have a 686 i need to replace the hydraulic pump suction tube seal and nobody stocks the tube assembly locally. I think the 560, 656 and 686 all use the same tube and seal, just change the part number according to where they locate the seal. The seal part number is CR 514189. I googled it and tried NAPA and a hydraulics place in Sioux Falls and came up with nothing. Another shop said the OEM may have that number captive for cross reference.

Overgreasing electric motor cavities has the same effect as with any bearing application except that grease can reach the motor windings. When filled completely with grease, an electric motor bearing will generate excessive heat due to churning. This results in energy loss as well as an accelerated rate of oil bleed and hardening of the grease thickener.

Slowly pump grease into bearings every few seconds. Using a quick-lever action could cause seal damage and not allow the grease to distribute throughout the bearing correctly.

Feedback tools can also be beneficial for fine-tuning your frequency. For example, ultrasonic instrumentation is one of the best ways to optimize the correct frequency and help you set up your maintenance program.

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Rod seals seal on the ID and OD, they can also be reversed to function as a wiper seal (not in the rod seal groove). Did you measure the OD of the tube and ID of the bore to ensure the Rod seal will indeed work?

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High Speed Bearing Oil

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Yes, I gave them the measurements but the tractor isn't here any more. I put a lip seal in the transmission housing and installed the tube from the filter side. Works great.

Too much grease volume (overgreasing) in a bearing cavity will cause the rotating bearing elements to begin churning the grease, pushing it out of the way, resulting in energy loss and rising temperatures. This leads to rapid oxidation (chemical degradation) of the grease as well as an accelerated rate of oil bleed, which is a separation of the oil from the thickener.

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The heat that has been generated over time along with the oil bleed eventually will cook the grease thickener into a hard, crusty build-up that can impair proper lubrication and even block new grease from reaching the core of the bearing. This can result in accelerated wear of the rolling elements and then component failure.

This excessive pressure can also damage single and double-shielded bearings, causing the shields facing the grease supply to collapse into the bearing race and leading to wear and eventually failure. When too much pressure is generated from a grease gun due to overgreasing, it is easy for the hard, crusty grease formed from heat (high operating temperatures) to be broken apart and sent directly into the bearing track.

How to grease a bearing with a grease gun

Bearing grease types and grades

Allowing the motor to run during and after greasing to expel any excess grease. This should be done before re-installing the purge port or bottom grease relief valve and cleaning the area of any excess grease.

EQYO engineers understand the importance of high quality, durable bearings and have developed impressive corrosion resistant bearing solutions that last.

Always make sure exhaust ports are cleaned out from any debris or old, hard crust that could be blocking the passageway.

Is this a actual seal or oring my CR interchange book slipped this number along with about 1000 or 2000 numbers in sequence with goes from 512xxx to 518xxxif it is a seal and not an oring get me the id and od in inches along with the width and I'll try again  russ

Bearing lubrication chart

Setting up a maintenance program is key to solving the problem of overgreasing. Each lube point, whether it be a bearing housing or electric motor, should be tracked as an asset, and records kept for scheduling planned maintenance or inspections of the asset. While the initial setup of a maintenance system may take some time and hard work, the end results will have a major impact.

Dakota Fluid Power sent me this to try. It's the same dimensions but it's made of Teflon, no metal housing. I just hope it will stay put on the metal tube. For $6 plus freight it's worth a try.

Establishing appropriate procedures and inspections during relubrication is another important part of a maintenance program. Some basic steps include:

Bearing grease specification

Again, the high pressure applied from a grease gun can result in grease finding its way between the shaft and inner bearing cap and pressing into the inside of the motor. The result over time is the coating of the electric motor windings with grease, which leads to both winding insulation and bearing failures.

Best grease forbearings

your other choice is have bearing/seal house match specs 99%...however once they do it will $10-16 + 8-15 frt  which makes it cheaper

Once you have planned the scheduling of the assets, you will need to determine the timing and amount of grease (volume) that should be applied at each point. The volume can be calculated with a simple equation (ref. SKF):

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Next, calibrate all grease guns in use and train the technicians on the proper procedures of usage. Calibrating a grease gun is very simple. All you need are the grease gun and a postal scale. Determining the weight in ounces per full stroke (shot) of the grease gun will allow you to identify the number of shots it takes to equal 1 ounce of grease. This will help you establish the right volume needed to ensure you are delivering the precise amount at each use.

Seal damage is another negative side effect of overgreasing. Grease guns can produce up to 15,000 psi, and when you overgrease a bearing housing, the lip seals can rupture, allowing contaminants such as water and dirt to gain access into the bearing housing. Keep in mind that lip seals usually fail around 500 psi. Read Lip Seals - A Practical Guide for more about this topic.

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