Take a bracket and finger start one Hex Cap Screw and Nyloc Nut per hole.
Note: The side of the bracket with “ribs” must have the Hex Cap Screw head.
| |  |PRE-LOADED BRACKET COMPLETE
Repeat this step until you have twelve Pre-Loaded Brackets.
| ### Final Assembly Parts Needed | **PART NUMBER** | **DESCRIPTION** | **QTY.** | | ------------------------------------------------------------------------------------------------------------ | ----------------------------- | -------- | | [REV-41-1767](https://www.revrobotics.com/rev-41-1767/) | 45MM X 15MM C CHANNEL - 248MM | 1 | | [REV-41-1432](https://www.revrobotics.com/rev-41-1432/) | 15MM EXTRUSION - 420MM | 2 | | [REV-41-1326](https://www.revrobotics.com/rev-41-1326/) | THROUGH BORE BEARING - SHORT | 2 | | [REV-41-1329](https://www.revrobotics.com/rev-41-1329/) | THROUGH BORE BEARING - LONG | 4 | | [REV-41-1267](https://www.revrobotics.com/rev-41-1267/) | 90MM GRIP WHEEL | 4 | | [REV-41-1190](https://www.revrobotics.com/rev-41-1190/) | 90MM OMNI WHEEL | 2 | | [REV-41-1327](https://www.revrobotics.com/rev-41-1327/) | SHAFT COLLAR | 6 | | | **ASSEMBLIES** | | | [ASSEMBLY 6](/duo-build/channel-drivetrain-build-guide/drive-rail-assembly.md) | DRIVE RAIL ASSEMBLY | 2 | | [ASSEMBLY 7](/duo-build/channel-drivetrain-build-guide/final-assembly.md#bracket-pre-loading-parts-required) | PRE-LOADED BRACKET | 12 | ### Final Assembly Steps | FINAL ASSEMBLY STEPS | | | -------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | |  | Slide the four Pre-Loaded brackets onto the Drive Rail Assembly as shown. | |  | Align the Pre-Loaded Brackets where 6 Hex Cap Screws and Nylock Nuts are exposed. | |  | Add two Pre-Loaded Brackets to the Motor side C Channel. | |  |Have the edge of the bracket roughly at the center of the large (9mm) hole. Start with the second hole to the right of the Double Sprocket Assembly.
Tighten the Nyloc Nuts until they are snug
| |  |Slide the 45mm X 15m C Channel - 248MM onto the Preloaded Brackets as shown.
Tighten the Nyloc Nuts until they are snug.
| |  | Repeat sliding four Pre-Loaded brackets onto the other Drive Rail Assembly as shown. | |  | Repeat aligning the Pre-Loaded Brackets where 6 Hex Cap Screws and Nylock Nuts are exposed. | |  | Repeat adding Pre-Loaded Brackets to the Motor side C Channel. | |  |Have the edge of the bracket roughly at the center of the large (9mm) hole. Start with the second hole to the right of the Double Sprocket Assembly.
Tighten the Nyloc Nuts until they are snug
| |  |Slide the second Drive Rail on.
Once in place, tighten the Nyloc Nuts until they are snug.
| |  | Slide two pieces of 15mm Extrusion – 420mm into the Pre-Loaded Brackets until they are through both sets brackets. One 15mm Extrusion is for the top and the other for the bottom. | |  |Align the 15mm Extrusion – 420mm so approximately the same amount of Extrusion is left on the end of each Bracket.
Tighten the Nyloc Nuts until they are snug.
| |  |Add a Through Bore Bearing – Short to both of the Drive Shafts and Through Bore Bearing – Long to the remaining shafts.
Note: the smaller section on the bushing faces away from the Channel
| |  | Take the Grip and Omni wheels and place on the shafts as shown. | |  | Add one shaft collar to the end of each shaft. | |  | Tighten down the shaft collars on each wheel to secure them in place. | |  | DRIVETRAIN COMPLETE |