Picked up a Foretravel motorhome for a friend. Cat 3208 pusher. I think it has an air throttle. When you first start it without any air pressure, engine will just idle. Once some air pressure is built, accelerator functions. Can anyone explain how this mechanism works? Never had one before.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13