Sunday, May 28, 2023


How often should your RV suspension be lubed?

I wanted to share this as a reminder if you own a towable unit to check and see if you have wet bolts or grease Zerks on your RV suspension.

How often should your RV suspension be lubricated? Well, if your unit is so equipped, you should be lubricating the Zerk every 6 months or 6,000 miles. Keep in mind that there is a total of 14 grease Zerks, 7 on each side of a towable chassis with a MORryde CRE3000 system.

MORryde CRE3000
Damaged caused by not maintaining wet bolts, plus road conditions.
Example of not cleaning and lubricating shocks.

Keep in mind that there is a total of 16 grease Zerks, 8 on each side of a towable chassis with a Dexter E-Z Flex system.

Example of a standard suspension system on top and a Dexter E-Z Flex on the bottom.

Bushing installation video.

Example of a nylon bushing above vs. a bronze bushing below.
Examples of a standard shackle link and a thicker shackle link with wet bolts.

Typically, when a bolt won’t take grease, you can remedy the situation by jacking up the trailer by the frame, which unloads the axle, springs and bushing. Then, it should take grease pretty easily. I have one bolt on my unit that I always need to grease with this method. You may have to rotate the position of the bolt until it will take grease.

All of you with new trailers and 5th wheels that come with the wet bolts should immediately try to grease up the wet bolts before your first trip. If a bolt doesn’t take grease, you can rotate the bolt by turning it in the tightening direction.

Hopefully, this gives you some basic understanding and a quick reminder to lube your towable suspension.

Here are some related tools and products to help for DIY crew:

More from Dustin

Read more of Dustin’s articles here.


Dustin Simpson
Dustin Simpson
I have worn many hats in the RV industry through the years. From an RV Technician, Warranty Administrator, Parts Administrator, Parts Manager, Service Manager and now Business Owner. I have even been deemed an RV Expert by the California court system, working on behalf of the customers, dealers, and manufacturers. My repair facility has been servicing customers at the same location since 2003. What sets us apart from the dealerships is we are here to fix and maintain what you have, and not sell you a new one. Whether you own a million-dollar unit or an entry level, my message to you will be the same, it needs to be maintained.


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Get Freight
16 days ago

For the less mechanically inclined, pictures with the actual zerg fittings circled would be helpful. The existing pictures showing the potential damage is good but you tell them to do it without showing them specifically what to do. For those with lacking experience it becomes frustrating to know it should be done but not know where to look for the details.

Above you mention 16 zerg fittings but not a single one jumps out at me.on the pictures. And the wet bolt??? No idea what that is or which of all the bolts you see are the wet bolts. Is it all of them?

Don’t get me wrong, these articles are helpful. But for a beginner. You just sent him on a potential multi week quest to figure it out as most articles like this assume the reader knows everything the writer does.

18 days ago

Interesting about a WET bolt. Never knew what they were called! I’ve actually made some for a racing buddy of mine. Very cool about using grease buster!
Thanks for the information

Tommy Molnar
18 days ago

Extremely informative article. I have never done any kind of maintenance on my trailer suspension system. I’ve bee wanting to have the MORryde system installed for a long time but never get around to it. Guess I’d better get moving . . .

18 days ago

I once had a wet bolt that wasn’t cross drilled so had no exit for the grease. Had a heck of a time trying, and failing, to get grease through until I took it out and found out why.

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