Kwikee Series 38 is a short-rise, single-tread electric RV step. If you need a replacement motor, curved gearbox or complete step, begin with the original identification label beneath the mounting frame. The Lippert drawings and part numbers below help you distinguish the step assembly from its individual drive components.
Series 38 dimensions and complete-step options
Lippert 3723383 is the complete Series 38 electric step with a logic control unit and power-switch kit. These specifications are for this exact assembly:
The alternative 372338 is a Series 38 step with a standard-drive arrangement and power-switch kit. It is a different electrical package, so compare the original step's part number and wiring before ordering. Both use a single tread, but that alone does not establish a complete-assembly replacement.
Series 38 curved A-linkage motor and gearbox diagram
In Lippert's factory parts drawing, callout 1 shows the motor, 2 the clevis and cotter pins, and 3 the curved A-linkage gearbox. The straight B- and C-linkage assemblies elsewhere in the drawing belong to different Kwikee series.
Kwikee Series 38 numbered parts · Lippert A-linkage system
Callout 1: 676061 motor and screwsFor the later IMGL-II drive; check the installed motor and controller
Callout 3: curved A-linkage gearboxView part 379160
Callout 2: cotter and clevis pin kitView part 379178
Callout 1: motor and screws, Lippert 676061 for the 2019-onward IMGL-II system. These are photos of the matching service parts; the complete manufacturer exploded drawing is in the full-size PDF link below.
Older IMGL and newer IMGL-II parts are different
Kwikee changed motor and controller designs in 2006 and again in 2019. A Series 38 using a 2006–2018 IMGL drive may require the matched motor-and-controller update instead of a motor-only replacement. The 2019-onward IMGL-II system uses different motor and controller numbers.
View the factory motor/controller generation chart
The A-linkage row covers Series 38. Compare the original production date, motor connector and control label before choosing a service part.
Kwikee Series 38 motor and control generations
Check the installed motor and controller version before ordering. Open the factory chart below for the complete replacement guidance.
View the Series 38 complete-step and frame replacement chart
Use Lippert's current chart to distinguish complete step 3723383 from frame-only parts offered for some other series. The Series 38 frame is not separately listed.
Lippert Series 38 additional service reference
The supporting manufacturer chart is available from the full-size document link below.
Kwikee Series 38 replacement parts by number
The part numbers below cover the complete step, mechanical linkage, earlier and later electrical components, door-switch hardware and step lighting. Use the part identification printed on the installed component rather than selecting by appearance alone.
| Reference | Lippert number | Component and selection | Product |
|---|---|---|---|
| Complete step | 3723383 | Series 38 electric step with logic control and power-switch kit24-inch tread, 4-inch rise, 14-inch run and 300 lb capacity. Kwikee 903809025. | View part |
| Alternate package | 372338 | Series 38 with standard drive and power-switch kitDifferent control arrangement from 3723383. Compare your original wiring and step label. | — |
| Motor diagram 1 | 676061 | IMGL-II motor with mounting screwsFor the matching 2019-onward motor/controller system; verify the installed control. | — |
| Motor diagram 2 | 379178 | Clevis and cotter pin kitAttachment pins for the curved linkage. Compare original pin and joint. | View part |
| Motor diagram 3 | 379160 | Curved A-linkage gearboxMechanical gear-and-linkage unit, not a complete motor or controller kit. | View part |
| 2019 onward | 676062 | IMGL-II motor, gearbox and A-linkage driveLater-generation motor and gearbox assembly; requires a matching control system. | View part |
| 2019 onward | 786949 | IMGL-II controllerLater controller reference, not interchangeable with the older 9510 controller. | — |
| 2006–2018 | 781008 | Paired motor and controller update kitLippert calls for updating the earlier IMGL motor and controller together if either fails. | — |
| Late 1999–2005 | 781005 | A-linkage conversion kitUse only after confirming the old-style step label and original drive configuration. | — |
| Earlier IMGL | 379147 | Earlier IMGL motor referenceHistoric step motor; do not assume an older motor fits a later IMGL-II controller. | — |
| Earlier IMGL | 379146 | 9510 step control moduleFor the matching older IMGL electrical configuration; check the harness and label. | View part |
| Door switch | 369311 | Black magnetic door-switch kitFor the matching magnetic door-switch arrangement; not every step uses the same switch. | View part |
| Step light | 379414 | Kwikee step light referenceShown in Lippert's parts chart; confirm the lamp and wiring before service. | — |
Series 38 step, gearbox and motor-part photographs
Compare the complete step assembly with its mechanical gearbox, pin kit, later motor drive, earlier controller and door switch. Each photograph leads to the corresponding part listing.
3723383Complete Series 38 stepSingle powered tread, logic control and switch kitView part details ›379160Curved A-linkage gearboxGearbox and linkage without motorView part details ›379178Linkage attachment pinsClevis pin and cotter pin kitView part details ›
676062Later motor/gearbox driveIMGL-II A-linkage assemblyView part details ›
379146Earlier IMGL controller9510-style control for matching old systemsView part details ›
369311Magnetic door-switch kitFor compatible black-control installationsView part details ›
Choosing a door switch or control module
A complete step's power-switch kit and a separate magnetic door-switch kit are not necessarily the same item. 369311 is a separate magnetic switch option for compatible black-control installations. Check the original door-switch contact arrangement, wiring and control generation before buying it. The older 379146 module must also be matched to the correct IMGL motor.
Before removing or servicing an electric step
Disconnect the 12V supply, support the step as directed by Lippert and keep clear of the linkage. The step can extend or retract unexpectedly when the door or ignition input changes. Follow the factory procedure when checking the motor or replacing the complete assembly.