Kent; the Schramm company was primarily a company that manufactured industrial air compressors They stared out making towed compressors then came up with the idea to make them self propelled One very popular combination was a 160 CFM towed pulled behind a 160 pneuma tractor the tractor had half its engine for power the other half was the compressor, these ran on gasoline. the Diesel models used a separate engine and compressor combination.
The HT300b was as near as I can find out made from 1967 through 1985. As near as I can tell I believe mine to be a 1969 model as any retrievable information on them is sketchy at best having mostly to rely on tractor forums for information.
This tractor came with a backhoe attachment with a very long boom and stick not used for digging purposes very much unless a small bucket wad mounted on it. since it just didn't have a lot of break out or lift power. It wasn't designed for digging anyway the 300 cfm compressor powered a huge pneumatic jackhammer. It wasnt' until sometime in the 1980s that hydraulic hammers could even begin to compete in the same size range that is.
I will probably use mine mostly to power a sandblasting operation. since I don't have the backhoe attachment for it.
It is really a bit under powered for its size to be used as an ag tractor and 6 feet longer than an ag tractor of similar power. But I don't need it for that since I have a Ford 8n a case 431 and a Ford 2600 plus a gravely walk behind and 3 lawn tractors
If I ever get around to having the time to build a pumpkin cannon I could use it to chunk pumpkins melon's or bowling balls at the Dallas hunters that invade our county every year during hunting season. Some of them are so bad ranchers around here have been known to paint the word cow on their herd stock.

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