Part No. HBB197: Big Boat Non-captive Bearing Car Rebuild Kit
Complete kit to repair non captive bearing cars. Kit includes endcaps, carloader and bearings for one car. Big Boat track is 32 mm (1 1/4") wide.
Resources/References:
Need help to design your Harken system - take a look here for the Harken System Diagrams
And here for Harken Manuals & Support Information