I don't have any pictures but the late parts manual for the 7W1-up #44 shows rear mounted single or double valve 25 gpm units for the seat tank D4's. Yes, they would be primarily for ag use.
Our channel highlights machines from the earliest Holt and Best track-type tractors, equipment from the start of Caterpillar in 1925, up to units built in the mid-1960s.
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