Wheel bearings on HGW1500 CSC trike

[berny]

Hallo,
I wonder if anyone can help med on this. I have a knicking sound coming from the rear on my 155 trike with CSC. It increases with speed, so it must be connected to wheels. I have liftwed up the back and turned the wheels, and there is absolutely no knocking sound. But when the trike is moved on a flat and even surface, it is back again.
My question: can the wheel bearing sound alright when no weight is on, but make this knocking kind of noice when trike is rolling on the road?
Or should I look for something else?
Note: the wheel bearings are not heated up ater driving, and the wheels are moving freely when the back lifted up.
Any help appreciated! Thanks
Berny

[Swagonmaster]

You don't have a rock in the tread do you?

[berny]

No, I have checked several times over and not found any.

[Swagonmaster]

Ok, then try loosening the lug nuts of the wheels and retorque them.

[berny]

Will do, thanks. I let you know. Gone for a week so we will have to wait for the result….

[berny]

Hallo again, the wheel bearings on the right side were absolutely crushed, probably by old age. Rusty even where broken. Bearings from 1970 Mustang, hard to find.
Thanks for your advice and comments.

[Swagonmaster]

They should not be hard to find. All bearings have a part number on them, the bearing will be a different number than the race. If you ask at an auto parts house they should be able to look up the bearing by that industry standard number and if all else fails then ebay or amazon should have them by the boat load.
BTW, napa has the best parts lookup system but even they are getting further away from the parts stores I remember that could look up anything on a car. Of course I also remember making my own gaskets when they didn't have one with gasket paper and a ball peen hammer so that may not be relevant.

[Swagonmaster]

And N.A.P.A. stood for National Auto Parts Association.