There was talk a while back about doing pump of the month. No one started it So I will try. I can not guarantee I will do it every month. This month we will do bennett 300 and 500 series. We will also include Bennett 76 and 77. I will start with info for 300 and 500 but post your 76 and 77s any time.
The 300 series included 371,372,373,383(not including Gulf)and were made from 1938-1941. The 371 has a computing Veeder Root, 373 is a twin, 373 is a non-computing clock unit and the 383 is a non-computing Veeder Root.
The 500 series included 541,542,543,545( not including Gulf)and were made from 1939-1941. There was also the 546,566,567 with the sight glass at the top in place of the ad glass. the 541 has a computing Veeder Root, 542 is a twin,543 has a non-computing Veeder Root,545 is a non-computing clock unit, 545 is a computing unit, 566 is computing with a hose retractor and 567 is non-computing with hose retractor and was made from 1940-1941.
The two series look the same but not many parts are interchangable. The frame are the biggest difference. I will post several pictures of the differences. We will start with pictures of the frames and on-off levers. The on-off lever is the only way to tell the two series apart with out opening the door. Also note in the frame pictures the door latching systems. If I do not note it the firt picture will be the 300 series and second 500 series.