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BFO
08-10-2000 15:59:00
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Re: need source for spider/lovejoy fittings in reply to Leon, 08-10-2000 07:20:25
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Leon, if you have to replace the rubber spider, a mis-alignment might exist between the pump and motor. A lovejoy coupling is pretty forgiving, so a dial indicator isn't necessary, just get out the feeler guages and a small straight edge. First step, using the feeler gages to measure the gap between the two coupling halves, is to determine the angular misalignment between the 12 o'clock and 6 o'clock positions, and shim the front or back of the pump ( or motor depending on which is easier). The proper way is to mark the coupling halves and rotate them together for readings, and make sure the bolts are torqued. Then, determine the misalignment at the 3 and 9 o'clock positions. You should be able to get all the readings within .002" with feeler gages. It is always important to maintain the manufacturer's recommended gap between the coupling halves. Once you've made the angular alignment, you're ready to use a straight edge to clean up the parallel, or axial alignment. Start with the 12 and 6 o'clock positions again, and shim accordingly. To determine the shim height, place the straight edge firmly along the axis of the higher coupling, and measure the gap at the lower coupling with a feeler gage. Then finish off with the 3 and 9 o'clock positions, torque everything down, and recheck all your measurements again. An aligned coupling is a happy coupling.
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