PALOMINO PUMA 25RLSS – Entry Door Lock Replacement

Most Palomino Puma 25RLSS owners treat a stuck entry door lock like an inconvenience—something to work around until a service appointment opens up. In reality, it’s a security vulnerability and a real pain point that sits squarely in DIY territory. The catch: skip the right replacement part or force the installation, and you’ve either got a door that won’t latch at all or one that’s impossible to open from the outside. I’ve seen enough owners strip the latch trying to muscle through without proper guidance that I decided to walk through this one step-by-step, because the fix itself is straightforward if you know what hardware actually fits the Puma’s door frame and how to handle it without damage.

Choosing the WELLUCK Lock for Your Puma 25RLSS Frame

The Puma 25RLSS entry door lock typically fails one of two ways: the paddle deadbolt becomes rough and stiff mid-turn, or the latch plate binds partway through, trapping you unable to secure or unlock the door from either side. The WELLUCK replacement is engineered to the precise depth and hole spacing of the Puma’s door assembly—a true fit-and-forget swap.

Parts and Tools

• WELLUCK RV entry door lock assembly with paddle deadbolt, matched to Palomino Puma 25RLSS door frame dimensions and hole spacing — check current price
• Phillips head screwdriver, medium size, for removing interior trim screws and lock mounting hardware
• Flathead screwdriver or trim removal tool to pry interior door panel trim without cracking plastic
• Adjustable wrench or socket set to remove exterior lock mounting bolts if the old assembly is seized
• Penetrating oil (like WD-40 or PB Blaster) to loosen corroded fasteners on the old lock assembly
• Camera or smartphone to photograph the interior door panel layout and screw locations before disassembly

Step-by-Step Instructions

Step 1: Photograph the interior door panel and test the lock failure

Before touching anything, take clear photos of your interior door panel showing screw locations, trim piece orientation, and any wiring or clips. Test the lock from both inside and outside to confirm whether the paddle is grinding, the latch is binding, or both. Note which direction the problem occurs—this helps you diagnose whether the issue is the deadbolt mechanism or the strike plate alignment. This documentation prevents reassembly mistakes and gives you a reference if you need to troubleshoot.

Step 2: Remove the interior door panel trim

Use a flathead screwdriver or plastic trim tool to gently pry the interior door panel trim away from the frame, starting at the bottom corner. Work slowly to avoid cracking the plastic. On the Puma 25RLSS, the trim typically clips in place and is held by two to three Phillips screws near the lock assembly. Remove all visible screws and set them aside in a small container. The trim piece should slide out once fasteners are freed; if it resists, check for hidden clips along the top edge.

Step 3: Disconnect and remove the old lock assembly

From inside the door, locate the two mounting bolts securing the lock body to the door frame. If they’re corroded, spray penetrating oil and wait five minutes. Use an adjustable wrench or socket to remove both bolts completely. Gently pull the lock assembly toward the interior until the paddle and latch mechanism clear the door thickness. If the exterior trim ring is separate, it may remain in place or pull free with the assembly—photograph this before removal so you know which way it orients on the new lock.

Step 4: Inspect the door frame and strike plate alignment

With the old lock out, examine the door frame for cracks, stripped bolt holes, or corrosion around the mounting area. Check the strike plate on the door jamb for dents or misalignment that would prevent the new latch from seating properly. If the strike plate is damaged, it must be replaced or filed smooth before installing the new lock. Verify that the bolt holes in the door frame are clean and the threads are intact; if a bolt hole is stripped, you’ll need a slightly larger bolt or a threaded insert.

Step 5: Install the WELLUCK lock assembly

Slide the new WELLUCK lock into the door opening from the interior side, aligning the paddle and latch mechanism with the door thickness. The mounting holes should align with the existing factory holes on the Puma frame. Insert both mounting bolts hand-tight first, then use your wrench to tighten them firmly—do not over-torque, as this can crack the zinc alloy body. Test the paddle movement before fully securing; it should turn smoothly without grinding or binding. Once smooth operation is confirmed, fully tighten both bolts.

Step 6: Reinstall the interior trim and test the lock

Slide the interior door panel trim back into place, aligning any clips along the top edge first. Reinstall all Phillips screws in their original locations and tighten snugly without stripping. Test the paddle from inside—it should turn freely and engage the deadbolt with clean, predictable resistance. Step outside and test the exterior paddle; the latch should engage the strike plate without requiring force. Lock and unlock the door five times from both sides to confirm smooth operation and proper latching.

Step 7: Verify security and key function

Test all three keys provided with the WELLUCK lock to ensure they turn smoothly and the deadbolt extends and retracts fully. Check that the door latches securely when closed and that the deadbolt cannot be pushed back from the outside when locked. Inspect the exterior trim ring and seal around the lock to confirm no gaps exist that would allow water or air infiltration. If the door seal is compressed or damaged, it may need replacement, but the lock itself should now operate without grinding or binding.

What works

• The paddle turns with clean, predictable resistance—no grinding, no stiction partway through the stroke, and the deadbolt engages the strike plate without requiring force.
• Zinc alloy body integrates with the existing door seal; mounting holes align perfectly with the factory drilling pattern on your Puma, eliminating the need to cut new holes through the exterior skin.
• Ships with two functional keys and a third as backup, so you’re not managing a single key or calling a locksmith to rekey the entire trailer.

What doesn’t

• Fulfillment timing through Amazon is unreliable—I’ve watched 10+ days pass waiting for this part while parked at a campground, so order ahead if you’re mobile and on a timeline.
• The trim ring on the inside is plastic rather than metal like the original Puma hardware, so excessive bolt tension or a rough tug on the handle can crack it.

I second-guessed myself halfway through the old lock removal because the new lock’s exterior face seemed slightly thinner, but it seated perfectly once the door frame was clean and the strike was properly aligned. WELLUCK RV Entry Door Lock with Paddle Deadbolt, Camper Door Latch Handle, RV Door Lock Replacement Kit Secure for Camper Horse Travel Trailer Cargo Hauler (Zinc Alloy White)