This is an ancient one that is in my Grestgranfathers Diamond T. It is a Hewitt and is 3-3/8 like the tachs and speedos of the day. It always “parks” on that temp shown but as soon as engine is fired it reads actual temp. Back then an old loaded 220 would run 1200 degrees all day long without complaint.
Freightliner Dash air switches, swapping them out advice.
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Rideandrepair, Jan 19, 2021.
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