Repair kit for MMI 502 flange pump
This kit includes the components within the MMI model 502 flange pump which normally experience wear to the point of requiring periodic replacement: (1) water seal, (1) oil seal, (1) impeller, (1) flange gasket, (2) o-rings, (1) shaft, made from 17-4 stainless steel), and (2) bearings, and (1) snap ring. The kit also includes a set of instructions, a short section of dowel rod, and a short piece of 1.5″ pipe to facilitate reassembly. Required tools (not included in the kit) are a pair of medium sized inside snap ring pliers, needle nose pliers, common grease, a deep 9/16″ socket, a 13/16″ spark plug socket (common for the Atomic 4), a common screwdriver, and a hammer..
Caution: Earlier models of MMI 502 flange pumps had the oil seal located at the flange end of the pump. If you have one of those earlier flange pumps, please pay close attention, when installing this kit, to step 6 and photo #12 which show the oil seal moved to the impeller side of the bearings. In this location, the seal will protect the bearings from water damage in case of a leaky water seal.
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