JUMPING BOGIE ON 2-6-4T

How do you stop the front bogie jumping at points on a 2-6-4T?
Going really slow is one answer but someone said to put a shim over it.
How big? How thick? Material? Pictures or diagrams would be good
SEND ANSWERS TO dublo@iinet.net.au

thanks for below - send your alternative answer to above

I certainly had the bogie jumping off the rails on my 2-rail 2-6-4T.

I “blue tacked” (ie non permanently stuck) a short length of plastic tubing on the top of the bogie, parallel to the axle.

This reduced the amount of free movement in the bogie.

Worked a treat.

from Tim L.

   Wren reproduced the dublo loco as they had bought the original dies from the Triang Co. who had acquired Hornby in 1963.

   The early model they produced also had this problem and later models had a wide flat spring above the ofending bogie.

   Graham h. 

The front bogie of the 2-6-4 Tank can be sprung using a piece of flat spring cut out in such a way that it can be held in place by the fixing screw. Brass shim might have enough spring in it (or phosphor bronze).
    Martin I

photo of modification on Bill M's loco