Some Ground Control TT travel-trailer kits combine two front 3K C-jacks with two short 5K rear Hall Effect jacks. Lippert's illustrated 799870 aftermarket component reference identifies the left and right rear jack separately, along with the touchpad and mounting system.
Parts pictured in this guide
Select an image for product details, or jump to the parts list. Match the complete model and part number before ordering.
Original Lippert illustrated components
Each document shows the original factory drawing and part-number key. Use the numbered or lettered positions below to find the matching component.
Components and manufacturer part numbers
The callouts follow the indicated Lippert drawing. Numbers not linked to products are included to help identify the part, not to imply individual stock availability.
| Callout | Lippert number | Component / quantity |
|---|---|---|
| A | 421366 | Powered tongue jack — 1 |
| B | 404488 | 3K C-jack — 2 |
| C | 428493 | Short 5K right-hand rear jack — 1 |
| D | 342610 | Short 5K left-hand rear jack — 1 |
| E | 116112 | Scissor-jack crank handle — 1 |
| F / G | 428191 / 688837 | Ground Control TT and One Touch labels — 1 each |
| H | 671102 | Bolt-on spacer brackets — 2 |
| I | 671294 | 38-inch center tube — 1 |
| J | 675725 | Leveling-sensor mounting plates — 2 |
| K | 671292 | Bolt-on I-beam mounting brackets — 2 |
| L | 349975 | Bolt-on brackets for 8- and 10-inch I-beam — 2 |
| M | 333041 | CANbus terminating resistors — 2 |
| N | 425585 | Four-pin pigtail harness — 1 |
| O | 305115 / 306298 | Right- / left-rear Hall Effect harnesses — 1 each |
| O | 307489 / 307490 | Right- / left-front Hall Effect harnesses — 1 each |
| P | 426526 | Power and ground supply harness — 1 |
| R | 331116 | CANbus data harness — 1 |
| S | 243688 | 35-foot leveling sensor harness — 1 |
| T | 329080 | CANbus power connector harness — 1 |
| U | 423094 | Leveling sensors — 2 |
| V | 433632 | Blue SE controller — 1 |
| W | 425306 | Auto-leveling control touchpad — 1 |
| X | 406345 | OneControl touch panel — 1 |
| Z | 118076 | 1/2-20 × 1½-inch mounting bolts — 12 |
Before ordering a replacement
Lippert 3K/5K Ground Control TT OneControl aftermarket installation manual, CCD-0002700. Check the edition for your installation. Use the full manual for installation, adjustments and safe service; leveling jacks are not supports for working underneath a trailer.
Product photos and available components
Explore the NewRVParts listings pictured below. An entire leveling kit, an individual jack and a replacement control panel are separate products.
