When I rebuilt my M18 and also my M20 I was able to find decent used jugs and pistons on Ebay for a reasonable price. The used parts were std. bore within wear limits, and I bought new std. pistons. Jugs from a vertical are different but can be modified for use in a horizontal application. A hole needs to be drilled in the valve box as a drain.
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149, 2072, Original, 1772, 1782, #1 cart, Parker 48" sweeper,
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