The T-34T you describe is an entirely postwar contraption. A few tanks may have been modified in the field as recovery vehicles, but there was no formal conversion program until after the war. At that time, many thousands of old T-34s remained in the tank park, and many of these (especially 76 mm tanks) were converted to special purpose vehicles. The turret and roof were removed and replaced by a plate roof with cupola, as in your photos, and these were used for driver training, as tractors, and as platforms for cranes and other special equipment. Many of these are still around, used in a wide variety of industries.
SUs did not get the same treatment. By the end of the war the SU-122 and SU-85 were few in number, and the SU-100 was still considered a potent weapon. The SU-100 was phased out much earlier, but the T-34-85 was still in active Red Army service in the Trans-Baikal and Far East regions until the mid-1970s, and with local militia units until the mid-1990s.
Outside of the USSR, there is no telling what was done with a T-34 (or SU). Certainly the DDR made their own conversions to ARVs, as did the Poles and Czechs, and there are photos of Hungarian SUs used as tractors. I'm sure that's just the tip of the iceberg. The T-34 was so widely exported, it's impossible to know what was done on it and with it.
Here's a photo of a German ARV:
And here's another photo of a Soviet conversion, in Egypt.
There are other photos on the web.
Cheers
Scott Fraser
