When your RV slide-out stops responding or grinds under load, the motor is usually the culprit. The Lippert 138448 is the genuine Klauber M-150N replacement motor built specifically for electric through-frame slide-out systems -- a design used extensively in Class A and Class C motorhomes. Direct-fit replacement means no fabricating, no adapting, and no guesswork on fitment.
The Klauber M-150N motor (Klauber part number K01285M150N, Lippert part number 138448) is the workhorse behind millions of electric through-frame slide-out installations. This motor drives the rack-and-pinion or threaded rod mechanism that extends and retracts your slide room. When the motor wears out -- shown by slow movement, grinding, overheating, or failure to respond -- replacing the motor assembly is typically the most cost-effective repair versus replacing the entire drive unit.
This is not a universal-fit generic motor. It is the correct OEM-specification replacement for the M-150N motor position in 2x2, 2.5x2.5, and 2x3 through-frame slide-out systems as installed by Lippert and Klauber in a wide range of motorhome applications.
Runs directly from your RV house battery system -- no inverter or converter required for operation.
Matched to the torque demands of through-frame slide-out rack systems in motorhome applications.
Low-speed, high-torque output profile appropriate for controlled, smooth slide room extension and retraction.
Klauber part K01285M150N. Verified direct replacement for original M-150N installations.
Through-frame slide-out systems route the drive mechanism -- typically a rack or threaded rod -- through the frame rail of the RV chassis. The motor mounts to the frame and drives the rack through gearing. This design is common in motorhomes because it keeps the mechanism protected inside the frame and provides a clean, low-profile installation. The tube size (2x2, 2.5x2.5, 2x3) refers to the cross-section of the drive tube used in the system, and the motor must match the tube size for proper installation.
Primarily installed in motorhomes (Class A, Class C). Verify your existing motor label reads M-150N or Klauber K01285M150N before ordering.
Before replacing the motor, confirm it is the motor at fault and not the control board, wiring harness, or mechanical obstruction. Common motor failure signs include:
Rated current draw is 20 amps under normal operating conditions. Sustained draws significantly above 20A often indicate a mechanical bind in the slide mechanism rather than a failed motor. Inspect the slide room travel, seals, and any debris in the track before assuming the motor is at fault.
Slide-out motor replacement on through-frame systems typically requires access beneath the RV and may involve disconnecting the drive shaft coupling before the motor can be unbolted. Confirm the slide is fully retracted and the RV is on level, stable ground before beginning any service work. Disconnect shore power and battery before disconnecting motor wiring.
After installing a replacement motor, many Lippert slide-out controllers require a recalibration cycle to relearn the slide room travel limits. Refer to your slide controller documentation -- typically this involves holding the extend or retract switch for a timed sequence. Skipping recalibration can cause the controller to cut power before the slide is fully extended or retracted.