Kwikee Series 37 electric RV steps are included in Lippert's #890 Winnebago step service manual. For the illustrated 2005-and-later drive system, the manufacturer identifies a B-linkage gearbox, part 379161, along with the electric motor and linkage-pin components.
Series 37 steps have been produced in different electrical configurations. Identify the step and controller on your RV before using the illustrated service chart to select replacement parts.
Series 37 drive and linkage parts
| Drawing / use | Part # | Description | Identification or shop link |
|---|---|---|---|
| 1 | 676061 | Later motor and screws | Check installed motor and controller generation |
| 2 | 379178 | Cotter and clevis pin set | View pin kit |
| 4 | 379161 | B-linkage gearbox | View B-linkage gearbox |
| Earlier service kit | 379769 | B-linkage IMGL/control update kit for older documented configurations | View earlier kit |
| Control reference | 379604 | Kwikee control identified by Lippert for Series 37 and 42 | Confirm the original controller label and wiring |
For a Series 37 step, don't order a motor/controller kit solely from the gearbox part number. Match the control label, motor connector and production generation. If the step predates the manual's stated application period, use the documentation for that earlier version.
Series 37 B-linkage exploded parts drawing
On the original manufacturer drawing, 1 marks the motor, 2 the connecting pins and 4 the B-linkage gear. Lippert's Chart 3 groups Series 37 with Series 28, 31 and 39 for those mechanical replacements.
Series 37 numbered drive components
1: Later IMGL-II motor (676061)Compare original drive generation
2: Clevis/cotter pin kit (379178)View matching part
4: Straight B-linkage gearbox (379161)View matching part
The Series 37 Winnebago service manual applies to documented model revisions; match your original step label. The full original Lippert diagram is available using the manual link below.
Photographs of Series 37 service components
These listed parts have individual NewRVParts product pages. The B-linkage gearbox and pin kit have distinct replacement numbers; the older service kit includes multiple drive components and needs additional motor-generation checking.
Identify the original Series 37 controller
Lippert separately lists controller 379604 for certain Kwikee Series 37 and 42 electric-step installations. That number refers to a control unit, not the B-linkage gearbox. Do not assume a similarly numbered controller fits the same wiring arrangement; compare the control's original part number and connectors.
The #890 manual covers the Winnebago step configurations described in the document. If your step label identifies a different revision or an older Classic drive, consult the applicable service documentation before selecting a motor or controller.
More Kwikee service diagrams
Factory source: Lippert Kwikee #890 (Winnebago) owner's manual.