OK, so I remembered today to check this out. I know in the past I have used MLVW (M35CDN) wheel cylinders by changing the pucks in the cylinder, so today I compared those cylinders with the CMP cylinders I have in stock here at work. The bolt holes and line fitting are the same as the 1-1/2 wheel cylinder but they are 1-3/8 in diameter. They also seem to have the same center (from the backing plate) as the 1-1/2 inch cylinder.
I checked the old American NSN for the wheel cylinders and came up with a part number of WC4419. I checked NAPA and they list them under part number 4419 at $40 trade price. Or you can simply look up M35A2 wheel cylinders on ebay....lots of them available.
You will have to move your pucks across from the old wheel cylinders, as the M35 uses the little rods rather than the shoes resting directly on the pucks. As well, you will need the different boots. The part number for those are 5975.
Now it's very possible that somebody is making up the required combination of wheel cylinder and pucks that we need. But at least we know that the casting is available.
I'll be facing this challenge, possibly this summer when I start on my artillery tractor. In the meantime, if somebody tries these numbers and is successful, please post the results.
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