[Bob Moseley (RIP)]

Rob

You have 3 sets of wheels on a Carrier.

1) Bogie wheels ( you call them road wheels)
2) Idler wheels - they are the 2 small wheels, one either side, that take up the track tension.
3) Track adjuster wheels (you call them idler wheels). If you don't have these wheels I suspect you may not have the track adjuster brackets either.

The bogie wheel and track adjuster wheel have the same part number of U72. In my 1943 Spare Parts Manual under Modifications it states "Owing to the scarcity of rubber, future production of track adjuster and idler wheels will be all metal, the rubber tyre being discontinued.The rubber-tyred bogie wheel can replace tha all-metal track adjuster wheel but in no circumstances must the steel-tyred track adjuster be used as a bogie wheel". The modifications also give carrier numbers that were fitted with plain bearings as opposed to ball bearings, again due to supply shortages.

Bob