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| Been using lithium complex for years. JD says polyurea greases are superior, not much different price so was thinking I should switch. Think I'll ruin anything? |
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| I've been using the JD SD polyurea grease for a lot of years and have had no complaints with it. I do use the special purpose HD Moly for sliding contact or pin and bushing applicaions though. Here is their comparison chart.
Attachments
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 JD grease DKD1688revGrease.pdf (119KB - 4058 downloads)
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| The SD polyurea has a 45lb timken load, the HD lithium has a 60lb load. Is the difference significant? |
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Hagen Brothers farms,Goodrich ND | It used to be that polyurea could not be mixed with another type of grease or bad things would happen, now the polyurea formula has been changed so it is compatible with most other grease types.
The biggest advantage of polyurea is that the ratio of oil to thickner is greater in polurea than other greases, so a given volume of polyurea will lubricate longer than other greases. the oil portion is what does the lubircating. Thickner onl;y keeps the oil from running away from the bearing.
Edited by Jon Hagen 1/29/2011 23:35
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Mandan ND | I use a Aluminum Complex. It is 100% Waterproof the Lithium grease is not. and the Aluminum Complex also carries a higher oil content like John said with the load test at 60lbs pumps to -25 |
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| Jon, I agree it seems to keep it's consistency for longer periods of time. Other types seem to get harder and cake up more. What about the Timken ratings is that something one should be concerned about. I figured you would know more about that question than I ? |
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Royal City, WA | This Timken website answers some of the above questions about greases.
http://www.timken.com/en-us/products/lubrication/Pages/faq.aspx |
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Nevada, Iowa | I am a little guilty of trying to keep things simple and I really like to stock just one type of grease. The SD polyurea seems to cover my bases well. I was concerned about it being too thin for some applications but it seems to stay in place very well and as mentioned it lubricating properties are visually superior. I have been using it in wheel bearings and have used it in our Brent 644 wagons. After three years in the Brents, repacking revealed little need to tear them down. The polyurea was in place and still looked fresh. |
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| Same thing I observed in J&M 10 ton running gear wheel bearings. Bought a couple of these at sales and the old grease seemed hard and somewhat lacking. Pulled the bearings and hubs and refilled with the polyurea SD grease and it seems to do very well. Inspecting later the grease seems the same as when it was first put in there. Plus it's easy to pump through a grease needle to pack wheel bearings. You can slide the needle between the cage and the rollers and fill the bearing then turn it in your hand before installing. Seems less wasteful than the cone type packer that needs 15 or more shots to fill the gap between the bearing and the center stud of the packing cone. |
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| Thanks good reference. |
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Hagen Brothers farms,Goodrich ND | Von WC Ohio - 1/30/2011 22:21
Jon, I agree it seems to keep it's consistency for longer periods of time. Other types seem to get harder and cake up more. What about the Timken ratings is that something one should be concerned about. I figured you would know more about that question than I ?
I can only say that the Mobil 1 synthetic grease I use does an excellent job including things like preventing torque lock in very heavy loaded drive line slip joints , and in general, wear is much less compared to Mobil lithium grease . The Mobil 1 synthetic has a Timkin 45 number.
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Chebanse, IL..... | Von
Thanks for the chart. Is there any time the SD Polyurea should NOT be used? |
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Elizabethtown,KY | I switched to Deere's polyurea grease a couple of years ago on my combine and am now using it for most applications, the reverser on the feederhouse is where it is most critical from what I've been told. |
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Nwmo | I started using Lucas Xtra heavy duty grease, it is a green poly urea like the Deere stuff. It does have a higher Timken load rating but according to the Timken website its doesn't mean a whole lot once your over 35lb. Its cheaper than Deere and I noticed Deere is recommending poly urea now, so that's why I switched from high temp lithium.
Devin |
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switch to polyurea grease
