One or the other is, thats for sure. The one that goes to the valve on the pump is likely a Williams piston pump. Could be S/A or D/A depending on the hoist. I'd bet it is an old grain truck with a scissor hoist, correct?


1953 Chevy 5-window 3100
In the Stovebolt Gallery
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Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain