Are you sure the pump is turning, There is a rubber coupler inside the fan basket that connects the burner moter to the pump. Some were cast ended that were compressed on to the rubber part, some had a male hex fitting cast in the end that the rubber slid over. These were held in place with allen set screws accessable thru a spot in the fan basket. Still others simply had a plastic ended coupling that slid on the moter and pump shaft and drove off the flat portion of the shafts. The last type were more prone to fail as the plastic would round out on the shaft. As to the filter inside the pump it is a very fine mesh screen and if I recall can be accessed by removing the bolts in the end of the pump and pulling the housing. Be carful on the gasket. Use a good fuel resistant sealer to put it back together. Large shaft pumps were 1750 rpm and small shaft were 3450 rpm as I recall. Unhook the fuel line to the nozzel and put it in a can. When I worked on them I had a hose I used to check flow in a can, needs to be pretty strong flow, and a gage set up for checking pressure. I set the gage up on a tee so I could check pressure with it connected to the nozzel as the burner was running to get real time pressure under normal running conditions. It should read 100 psi if I recall. It seems you could usually feel and somtimes even hear a vibration on the bad coupler deal. Not always but most of the time. And this is worth what you paid for it and is from memmory based on somthing I haven't worked on in close to 30 years. Angle Iron
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Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th
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