Grease Joint Rejuvenator® Professional Model - Patented - for Flushing Out Hardened Grease from Shafts, Bushings, Joints and More! (#7862)

I bought this tool to free up some plugged up grease fittings on my backhoe and at first it didn't work because I was using PB Blaster and WD40 and the plunger was bouncing back after hitting it. The key to make this tool work is to fill it with ATF fluid/transmission fluid and to use heat if you can on the joint/fitting. It freeded up some old grease on my old backhoe and saved me a lot of money in repairs.

Works good

Works well

60% of the time, it works every time!

I’m not normally a review writer but I do rely on them for my buying decisions. So in this case, I didn’t hold high hopes for this working for me after reading the negative reviews.I have had a driveway gate hinge that has never accepted grease since installed 8 years ago, I just ignored it. I recently decided I needed to get grease into it before it seized up. After seeing a YouTube video where a similar tool was used to get grease into a fitting, I found this one. I used 3-in-1 oil in the tool and gently tapped the oil into the fitting with a regular hammer. I took my time and slowly tapped in the entire cylinder of oil I had loaded into the tool, even though the oil started seeping out the top of the hinge after about half of the oil had been forced into the fitting. I did have to back off the knurled nut to get the tool off of the grease fitting, as described in the instructions. Attached my grease gun and forced the oil, followed by grease through the hinge. Perfect!

Yes!! Just yes! Had a few grease fittings that wanted to fight on our 5th wheel suspension no matter what I did. Loaded this tool with WD40, gave her a few "gentle" smacks with the 4lb hammer.... and we now have free flowing grease fittings. It was nice seeing the old grease launch out with the WD40 and then have the new grease flow easily through the fitting with the grease gun afterwards. Great tool to keep on hand!

In summary, this thing works as advertised. Four wet bolts on our 5th wheel RV would not take grease despite lifting wheels off the ground and replacing the Zerk fittings. This filled with Kroil did the trick! I was able to hammer Kroil through the obstructed wet bolts, per instructions. Last, it’s a solidly built tool. It’s worth the price!!

So. I've used this 6 times now and have yet to clear a grease joint or pin. have filled it with 10w oil, brake cleaner, Blaster, WD40 no luck. Typically, I have to use a rose bud to heat the joint and it looks like I will still be doing that, but I see this tool as a way to speed that up by having a nice clean way of injection a oil like blaster into a hot joint to do a better job of cleaning out the bushing/joint. I don't see this as a miracle tool, but a helpful tool. For the price it is a quality tool made out of steel for that reason I would recommend this tool as an aid. I work on heavy equipment, dozer, scraper, excavators and everything in between including wash plans and crushers. Bottom line a good ground guy with a grease gun should not be under paid.