When your Kwikee 28 Series single electric entry step frame is bent, cracked, or corroded, this direct-replacement steel frame from Lippert gets you back in service without replacing the entire step assembly. Part number 3747457 (also sold as LIP3747457) is a direct replacement for the earlier Lippert frame 3747453, with pre-drilled mounting holes and factory-matched dimensions so it installs without modification.
This frame is constructed from heavy-duty steel with a powder-coated finish to resist rust and road grime -- important on a part that lives underneath your RV and sees every puddle, salt spray, and dirt road you drive through. Solid steel drive rods and stainless steel bushings keep the linkage moving smoothly over thousands of cycles, while air-pressed rivets at the joints resist fatigue and loosening over time.
Mounting holes are pre-drilled to match the original Kwikee 28 Series bolt pattern, so you're re-using your existing motor, control unit, and wiring harness. No fabrication required -- just transfer your drive components and hardware to the new frame.
Powder-coated steel frame with solid steel drive rods and stainless steel bushings for long service life in exposed under-coach conditions.
Factory bolt pattern -- 22" wide x 6-1/2" deep -- matches the original 28 Series mounting footprint for a direct bolt-on installation.
Riveted linkage points resist vibration-induced loosening and fatigue, maintaining tight tolerances across the step's extend-and-retract cycle.
Rated to support 300 lbs per step, matching the load rating of the original Kwikee 28 Series single-step assembly.
Part 3747457 is the current production replacement for the earlier Lippert/Kwikee frame part number 3747453. If your existing frame carries that number on its label or your RV's parts manifest, this is the correct updated replacement. The two frames share the same bolt pattern, step width, and drive rod interface.
This listing covers the step frame assembly only. The following components from your existing step are reused and are not included with this part:
If your motor or control unit is also damaged, those components are available as separate Lippert/Kwikee service parts.
Because the mounting holes are pre-drilled and the bolt pattern matches the original, most owners with basic hand tools can complete this swap in under an hour. General process:
Covered by Lippert's limited 1-year manufacturer warranty against defects in materials and workmanship from the date of purchase.