The exact OEM replacement spacer that keeps your electric RV step motor properly positioned and your drive gears meshing correctly. Fits Lippert Coach Step and Stromberg Carlson single, double, and triple electric sliding step assemblies. Sold individually -- most applications require 6 spacers total.
The motor spacers in a Lippert or Stromberg Carlson electric sliding step do one important job: they hold the step motor at the correct height on its mounting bolts so the drive gears engage at the right depth. When these plastic spacers crack, split, or go missing -- common after years of vibration, road shock, and temperature cycling -- the motor sags or shifts. The result is gear skip, grinding, a step that only partially extends or retracts, or a motor that works hard and fails early.
Replacing worn spacers is a straightforward DIY repair that can save the cost of a full motor or step assembly replacement. Because the part is small and inexpensive, it is smart to replace all spacers at once rather than just the ones that look obviously damaged.
1/2" outer diameter and 1/4" inner diameter match the original motor mounting bolt and housing dimensions exactly.
OEM part number 128958 -- not an aftermarket approximation. Fits the housing tolerances the step was designed around.
Works with single, double, and triple electric Coach Step and Stromberg Carlson sliding step assemblies.
Backed by Lippert's standard 1-year replacement parts warranty against defects in materials and workmanship.
Each spacer slides over a motor mounting bolt between the motor body and the step housing bracket. The stack of spacers on each bolt sets the motor's vertical position so the motor's output gear aligns with the step rack gear. Lippert engineers the spacer count and thickness for each step model -- using the wrong number or a different thickness shifts that alignment and causes premature gear wear or binding.
Most Lippert and Stromberg Carlson electric step applications use 6 spacers total across the motor mounting points. Confirm your specific assembly's requirement by counting the spacers removed during disassembly before ordering quantity.
If one spacer has cracked or deformed, the others have experienced the same heat cycles and vibration. Replacing all 6 at once ensures uniform motor alignment and avoids a repeat teardown in a few months. This part is sold individually, so add the correct quantity to your cart before checkout.
The 128958 spacer is designed for use in Lippert-manufactured electric sliding step assemblies sold under the Coach Step and Stromberg Carlson brands, including:
This spacer is specific to the electric motor-driven sliding step design. It is not intended for manual folding steps or for non-Lippert electric step brands.
Lippert acquired Stromberg Carlson's step product line, so steps labeled "Stromberg Carlson" and later "Coach Step" by Lippert share the same internal motor mounting design. If your step has an electric motor with a plastic housing and a rack-and-pinion drive, this spacer is almost certainly the correct part. Check the step housing or wiring harness for a Lippert or Stromberg Carlson label to confirm.
Disconnect shore power and your coach batteries before beginning any step motor service. The step motor can activate unexpectedly if the door switch is triggered during work. Remove the motor mounting bolts, slide the old spacers off, install new spacers in the same configuration, and reinstall the motor. Torque the mounting bolts snugly but do not overtighten -- crushing the spacers defeats their purpose.