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  • Floor jack universal joint
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  • U-Joint pn 248731
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  • Notice the HEX (Hexagon with 6-sides)
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  • Measurements listed in product description.
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HW 248731 Replacement U-Joint Assembly for 93642 & 93652

0.40 LBS
Free Shipping

Product Description


*Note this has a HEX (Hexagon) end NOT square! Please don't purchase unless your jack is listed below. Free shipping on this item within the USA. Hein Werner HW 248731 replacement Ujoint Assembly 248731 supersedes some of the following pn's- 228356, 228349, 227874, 890-022-666, - Walker, Lincoln, Omega, Snap On, Mac Hein Werner - Ujoint for 93630, 93632, 93642, 93652 and others - Item No. U- JOINT RELEASE ASSY 248731, includes 216143 O-Ring as pictured. OE replacement U-Joint for floor jacks. Also works on some 1-1/2 ton jacks model numbers 93630 and 93632 by Walker.

The over-all length is 4.61" (117.31mm) the hexagon diameter is .51" (13mm) the outer edge of the threaded part is .43" (11.11mm). See the parts breakdown for your jack to verify the application.

Universal joint used for many 2 ton up to 3 ton capacity floor jacks. Does NOT fit Craftsman (go to Sears), Michelin or any Harbor Freight jacks.
Fits the Following:
* Snap On - YA642
* Snap On YA700 - YA700B
* Mac Tools JS642USA
* Lincoln- 93642 - 2 ton floor jack
* Lincoln- 93652 - 3 ton floor jack
* Hein Warner - 93642
* Hein Werner - 93652
* Napa 91-642
* Omega 248731
* Walker 93630
* Walker 93632
The 248731 supersedes the following part numbers - 228356, 228349, 227874, 890-022-666 and YA700B3. As long as your model is listed, the 248731 is correct. This is an upgraded U-joint and some disassembly may be required. In fact the smaller ones are no longer available, so that's the reason some disassembly is needed. See our YouTube video below "Lincoln Jack U Joint Installation - 248731".
Question: I bought a U-Joint and installed it but the jack won't go down unless I release the valve all the way and then stand on it. What could be the problem?
Answer: The U-Joint has nothing to do with the saddle not lowering properly. You can verify this by removing the jack handle and unscrewing the U-joint further than the normal range. If the saddle stays up this verifies it has nothing to do with the U-joint. I've had the same problem; the jack's saddle not going down unless I stood on it, even with a brand new jack. My problem was the main pivot shaft was causing the sticking. The solution was grease. There is a grease fitting on mine for the main shaft but I was unable to get it to take grease. When using the grease gun, grease should squeeze out from both sides of the shaft if it's getting through completely. I took it apart and removed the shaft. I coated the shaft and the inside of the holes generously with wheel bearing grease. After I reassembled it; I worked the jack a few times and it was better but not perfect. When working it, I had to let the jack handle drop a few times until it started lowering the saddle normally. Now it works great. Another potential cause of the saddle not lowering properly could be weak return springs. But as I said, with mine it was brand new which eliminated that possibility. We recommend when replacing the U-Joint to thoroughly grease the main pivot shaft while it's apart.
Question: How many sides are on a hexagon? 
Answer: SIX. If you u-joint does not have 6 sides on it this u-joint will NOT work. At this time we don't have u-joints with a square end.
Question: Why is this u-joint larger in diameter than the one that came out of my jack?
Answer: This is the updated design which is much stronger.
Question: The new u-joint will not fit through the housing like my original one. How can I install it if it's too big to fit through the housing? 
Answer: Some dis-assembly is required to install the upgraded u-joint on some jacks that have the smaller opening in the housing. See our video that shows how to install if your's require's partial disassembly. The job can be done in less than 15 minutes in most cases and you'll have a much stronger, beefier u-joint when finished.
Quality replacement Universal Joint. FREE USA shipping (3-5 days). U-joint comes with O-ring and plastic Insert. Video can be found on YouTube showing how to install, also see below. Will work on many brands and models from 2 ton up to 3 ton capacity with broken u-joints. This Ujoint does NOT fit 1-1/2 or 2-1/2 ton jacks with square ends. Does fit 1-1/2 ton jacks by Walker model numbers 93630 and 93632. See partial application list below. Please verify application by checking the list or comparing the measurements prior to ordering. 
Fits the following 2 and 3 ton floor jacks: SNAP ON YA642, YA700, YA700B. Lincoln 93642 and Lincoln 93652 floor jacks. Hein Werner- HW-93642 and HW-93652, also known as HW93642 and HW93652. Napa, Marquette, etc. As long as your model is listed, the 248731 is correct. This is an upgraded U-joint and some disassembly may be required. In fact the smaller ones are no longer available, so that's the reason some disassembly is needed. See YouTube video called "Lincoln Jack U Joint Installation - 248731".
Universal Joint for Floor Jack U-Joint pn 248731 (01:31)
http://wiseautotools.com/hw-248731-replacement-u-joint-assembly-for-93642-93652/ Our 248731 u-joint fits many floor jacks. Need a replacement for your worn out or broken jack universal joint? We got you covered. Visit our site or call us at 800-734-8665.
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Product Reviews

  1. Perfect fit and function 5 Star Review

    Posted by on 10th Jul 2017

    As promised the part fits and my Lincoln floor jack functions like new.

  2. Replacement u joint 3 Star Review

    Posted by on 15th Dec 2016

    It is too big for my application unable to use.

    From Management: Unfair rating, since you either purchased this for something it's not intended for. Or, did not read description, the label information or did not watch the video. Here's what you may have missed: This is an updated design which is stronger (bigger diameter) than some of the originals. It requires some disassembly. If your model is one that is listed, it WILL fit. See the video for additional info on how the installation is carried out.

  3. Better than original! 5 Star Review

    Posted by on 27th Jul 2016

    This is a direct fit name Hein Werner u-joint. The surprising thing is that it looks MUCH better than the one that came in my jack originally. Best price I could find and was shipped in two days to my door. Thanks!

  4. Jack U-joint 4 Star Review

    Posted by on 14th May 2016

    Product worked as described. Wasn't much of a floor jack without the use of the handle for operating. Product purchased and was a direct fit. Would recommend for anyone with this type of jack. Also, the u joint that this replaced appeared to be a lot lighter duty. My jack is a Hein Werner.

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