castor angle adjustment

[stuvy]

Unusual request now, my friend works at a farm and they have an veg picker that has castor wheels on the rear fixed to the double rear linkage, only problem is if your going over a few miles an hour the wheels buffer like when you run in the supermarket with a shopping trolley. The guy that built it told them to buy a bigger tractor to lift it off the ground when they want to use it on the road or accessing fields etc. this isnt an option as they only recently bought a little kubota and dont have the budget to buy more machinery. Im going to cut and re weld the necessary angle.

So my question is, what angle would be good for the wheels to still be able to turn 360 on them selves(horizontal bearing) but not buffer when being used on the access roads.

Hope this is in the right section if not feel free to move

 

[piman]

Hello Stuvy,

if we are talking normal castors, then as fitted they will have a steep angle (45 degrees??).

This might be a bit hit and miss but try tilting the vertical spindle by 35 degrees back?

Alec

 

[stuvy]

Hi Alec,
the closest pic i can get is this http://www.wadsworthquads.co.uk/atv.../logic-equestrian-atv/logic-pro-sweep-msp120/

This has the same design but the angle looks neater on this unit.

My second question is what type of horzontal bearing would you suggest to help the wheel 'swivel'

 

[gordon stephenson]

As mentioned by Piman, I would try laying the vertical over to the rear at the bottom end.I,m pretty sure it would make it a smoother castor action,