standar main bearings

[johne504]

Wondering what sources have standard main bearings for a halftrack.  I'm going to replace the rods/mains in my 160AX.  I have the rod bearings, but still need to find a set of standard size main bearings, any leads would be great.  And, has anyone ever changed main bearings with the engine still in the halftrack?  thanks, John Engelke.

[spec4don]

Kevin Lockwood may them. Warren Dushane  on the G503 has engine parts. I think. When I was a young pup, we made a pin that fit in the oil hole of the main bearing journal to roll the upper bearing. Kind of looked like a flat tee. Pull the plugs and crank the engine around by hand.

Don G.

[johne504]

so replacing main bearings in frame is doable then, with the right tools...... thats good to know.  I will try Kevin, and Warren on the bearings, thanks,.. john