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Fixing the old truck

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Joined: Nov 2006
Posts: 173
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I am puzzled by the wiper knobs in my 46. What do the two knobs do? I don't have any arms on them right now, and they no doubt need rebuilding, but what knob does what.
Sorry for the duhhh question, but I don't have an owners manual for the truck.
Scott


1947, 1950, & 1952 Chevrolet 1/2 ton
1952 GMC 450 series Cab Over Engine
1946 Chevrolet 2 Ton
Joined: Apr 2009
Posts: 252
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Not sure I put electric motors in. Maybe one opens for vacuum and the other for speed?

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Gman, that was my thought too. I just wonder what those two knobs do.
Scott


1947, 1950, & 1952 Chevrolet 1/2 ton
1952 GMC 450 series Cab Over Engine
1946 Chevrolet 2 Ton
Joined: Jan 1970
Posts: 365
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One knob (the left one, I think) makes the wiper operate. The right knob 'parks' the wiper.


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1951 Chevy 1/2-ton Pickup truck
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Thanks racecarl, I thought the right knob acted like a valve of some kind, it tightens up to stop. By "parks" do you mean the left adjusts the sweep of the arm or effects where the arm stops when you cut off the vacuum.


1947, 1950, & 1952 Chevrolet 1/2 ton
1952 GMC 450 series Cab Over Engine
1946 Chevrolet 2 Ton

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