If your Schwintek in-wall slide is hesitating, stalling, chattering, or running out of sync, the motor is often the first component to fail. This NBK Parts aftermarket replacement -- SKU 20526 -- is built to the IG-42 form factor with a 10mm D-shaft and plug-in connector that matches many Lippert Schwintek in-wall slide setups using the original 236575 motor. Drop it in, reconnect the plug, and get your slide running smoothly again.
The Lippert Schwintek in-wall slide system uses a motor mounted inside the sidewall of the RV to drive a worm-gear rack along each slide rail. When one motor weakens or fails, the room can rack (one side moves faster than the other), stall mid-travel, or refuse to extend or retract at all. Replacing the failed motor with a correctly spec'd unit resolves these symptoms without replacing the entire slide mechanism.
This NBK Parts unit (vendor part 20526) is an aftermarket replacement for the Lippert 236575 motor. It shares the same IG-42 body style, 10mm D-shaft profile, 300:1 gear reduction, and approximately 22 RPM no-load output speed as the original, and uses the same plug-in electrical connector found on compatible Schwintek in-wall systems.
Compact gearmotor body approximately 6.15 in. long x 1.65 in. diameter -- sized to fit the existing motor pocket in compatible Schwintek in-wall slide assemblies.
Flat-sided D-profile output shaft engages the Schwintek drive gear positively, preventing slippage under load that a round shaft would allow.
High-ratio internal gearbox delivers the torque needed to move a loaded slide room while keeping no-load output speed at approximately 22 RPM -- matching the original Lippert 236575 spec.
Operates on standard 12V DC coach power. Plug-in connector style matches compatible Schwintek in-wall controller wiring -- no splicing required on matching systems.
Schwintek in-wall motors are brushed DC gearmotors. Over time, carbon brush wear, moisture intrusion, or prolonged operation under high load (binding slide seals, debris on the rack) causes them to lose torque, draw excessive current, or fail entirely. Common symptoms that point to a motor rather than a controller or wiring problem include:
Replacing just the motor -- rather than the entire slide mechanism -- is the standard field repair when the rail, rack, and controller are otherwise intact.
The Schwintek in-wall system routes a toothed rack along the top and bottom of the slide opening inside the sidewall, driven by a motor mounted within that wall cavity. This is a fundamentally different design from Lippert's through-frame, rack-and-pinion, or electric-over-hydraulic systems. This motor is engineered for the in-wall application only.
Replacement is a mechanical swap performed from inside the RV wall cavity or slide room opening, depending on how the coach was built. General process on most compatible units:
On systems with two motors (one per slide rail), it is good practice to inspect the second motor for wear at the same time. Running one new and one worn motor can lead to racking.