nz2 Posted April 21, 2018 Share Posted April 21, 2018 Can anyone identify this drive unit? Stamped on the crown wheels is 8 and 91 the numbers being upside down to each other. There are 91 teeth to the crown wheel, and it is 13 inches in diameter. There has been an alloy casing about the diff as evident from the few bits remaining on a bolted flange.. The mounts for the chassis attachment makes it a 3 foot wide chassis. The two supporting tension bars across the housing should be a feature for identity. Chain sprockets have 17 teeth with 1 1/4 inch pitch. Centre to centre of the sprockets is 47 1/2 inches. The front axle also in the photo has nothing to do with the chain drive unit. The start of another project ! Doug W Quote Link to comment Share on other sites More sharing options...
Citroman Posted April 21, 2018 Share Posted April 21, 2018 (edited) Have seen this construction before looks like the rear axle of a Stanley steamer. Edited April 21, 2018 by Citroman Quote Link to comment Share on other sites More sharing options...
David Herbert Posted April 22, 2018 Share Posted April 22, 2018 Why would it need the tie rods if it was bolted to the chassis and drove through chains to the rear wheels? I suspect it is, as Citroman says, actually a rear axle and originaly had wheels not sprockets on the ends. David Quote Link to comment Share on other sites More sharing options...
nz2 Posted April 24, 2018 Author Share Posted April 24, 2018 I too have considered the option of it being a modified axle from one with wheels, however a couple of points would shun this change. On either end are threaded sections for adjusting the spacing of the rear axle and chain tension. The blocks that allow the unit to be attached to the chassis are narrow and show no flat areas as per a spring base or holes where the spring mounting bolts would occur. Doug W Quote Link to comment Share on other sites More sharing options...
8_10 Brass Cleaner Posted April 24, 2018 Share Posted April 24, 2018 From what Ive seen of Stanley steamers the crank in the engine is transverse and drives the diff directly on the rear axle via spur gears. No bevel required. And certainly no chains Quote Link to comment Share on other sites More sharing options...
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