Trailer Suspension Wet Bolt Not Taking New Grease

Updated 05/03/2025 | Published 07/15/2019

Question:

I have a 5th wheel with wet bolts on all hangers. One of them is not taking grease. I have checked the grease fitting and it is functioning properly. Is there options to free it up without taking it out. If not, what is the procedure to replace it? Thank you in advance.

asked by: Bruce Y

Helpful Expert Reply:

Most likely there is some old grease inside the bolt that's clogging things up. You can raise the trailer up and remove the wet bolt in question to give it a thorough cleaning or just simply replace the bolt altogether. Unfortunately there's not a good way to clean it out while it's still in place.

If you would rather just replace it then you will just need to take a few measurements to make sure you get one that's the same size. For example the Redline Wet Bolt # 126B2 has an overall length of 3-5/8 inches and a 9/16 inch diameter. I have attached a link that will take you to our complete selection of suspension bolts that you can look through as well.

expert reply by: Chris R

Mike M.

5/3/2025

Chris: Your suggestion of removing the clogged wet bolt led me to another solution which turned out to be much simpler. I removed the wheel and all load from that axle, and attempted to loosen the bolt. The suspension was flexing, making it difficult to loosen that bolt, but it gave me an idea. I attached a box end wrench to the grease fitting end of the bolt and used that to flex the Road Armor assembly several times while also attempting to pump grease. Even though it still went in a little harder than a clean bolt, it worked and I saw grease come out of the two points where you would expect it. So thanks!