Since our trailer is parked at a storage lot I decided to replace the "universal" CH751 cargo door locks. I ordered a set of five "CH751 Security Upgrade"
replacement locks, keyed to the main door's Global Link key, from RV Locks And More.
If you only want to replace your locks for security reasons the 7/8 inch lock is the OEM size on our trailer and is probably the same length on all of the Folding Trailers. This is an easy to do modification if you stick with the stock 7/8 inch length locks. Removing and replacing the locks is a 4-5 minute job per lock.
Note: You will be reusing the OEM cam arm screwed in to the OEM lock so don't lose it! Also when removing it look at how the cam arm is positioned so you can install it on the new lock to work in the same way.
Upgrade Option: I wasn't real happy with how the OEM locks "felt" mounted in the foam core so I went with the longer 1 1/8 inch length lock. I then used M20 Metric Stainless Steel fender washers, painted with Gloss Black Rust-Oleum, as reinforcements / spacers on the outside and inside of the cargo hatches. Adding the washers gives the lock a much firmer feel when opening and closing the cargo doors. The gloss black washers, with the stainless steel lock centered in them, look good with the other black trim on our trailer.
RV Locks And More provided excellent customer service and my locks were delivered in four days even during the Christmas rush. In addition to the lock sets I also picked up a couple of their LED Lighted Keys which are fairly bright. Their bill was under $30.00.
I bought the M20 Washers I used at Ace Hardware, you will need three washers for each
lock. I used two on the outside and one on the inside to get the spacing right for the cam arm to fully engage and tightly shut the door. The washers and paint were another $20+ bringing my total cost for the project to approximately $50.00.
Using the longer 1 1/8 inch lock and adding the reinforcing washers took a bit of fiddling initially to get the lock spacing correct. Once I determined the number of washers to use it was an easy "Remove and Replace" modification. Letting the paint dry was the most time consuming part of this mod as it has been raining like crazy here.
The tools you will need are very minimal. You will need a screwdriver, straight or Philips #2, and a pair of pliers, or the correct size wrench, to remove and install the locks cam arm and retaining ring. I used my trusty Leatherman Multi-tool to remove and reinstall a lock for measuring it before ordering the replacements.
If you want to add some security to your cargo areas, and get rid of a key on your key ring in the process, it is well worth the effort. I'll take a couple of pictures to add to the thread when I get back out to the trailer.