Kadee Body Mounts for Aristo Heavyweights

Kadee makes specialized components for body mounting Kadees.

I was having uncoupling problems with a truck mounted Kadee behind my new E8. The couplers just rode over each other. The design of the Aristo 3 axle truck is such that pressure/weight from the body is not evenly distributed fore and aft since the pivot point is not in the center of the truck.

Also, the long coupler tang has too much leverage against the truck and it's springs. 

The result is excessive travel up and down of the coupler.

So I decided to try the Kadee body mounting system, even though I have some sharper than hoped for vertical transitions.

(Being body mounted, the coupler "attitude" is not from the coupler tang on the truck, but the overall attitude of the car, which should be worse)

The bottom line, it was worth it, and works better everywhere.

I decided to try this out on the first car in my train, the RPO car, which is one of the two new cars Aristo has started making (the other is a full baggage car).

The Kadee parts consist of:

The way it works, there is a square recess at the end of the car. You cut the old coupler tang off, screw the bracket to the coupler housing and then to the shim, and the whole works is glued into this square recess.

Not so fast! Aristo changed the underbody of the two new cars, the recess is gone, and you have to cut away part of a plastic crossmember to do it. (Thanks a lot Aristo!).

You also need to notch one side of the shim, because you need clearance there too!

To mark what to cut out, measure from the leading edge of the diaphram back to the back of the shim, exactly 2 inches.

Then mark the crossmember with the angled end of the shim, and then cut it away, I used a carbide bit on a dremel.

Notch the other end of the shim to clear the end of the car, and the whole thing sits in place. Kadee says to glue, but use a number 44 drill (.086") through the two holes and use Kadee 2-56 screws and nuts to secure it. These are the long ones that come with Kadee 830's.

The picture below shows the assembly in place:

And, instead of gluing, I was able to use screws, you can see where they come up through the floor inside. They are the two screws in the center in the picture below.

Weather Underground PWS KCACARLS78