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SB Removing of impeller, part #176 or #177, should be done with care so as not to damage the shaft. During assembly, impellers are lightly shrunk on the shaft so that it is impossible to drive them off without applying heat. Use an acetylene torch. Heating in the proper place is VERY IMPORTANT. Start heating the impeller from the outside dia-meter to the suction wear ring for a period of 1 to 1-1/2 minutes. After heating- both sides of the impeller, apply heat to the hub LAST. Keep heat off the shaft as much as possible. Rotate heat so that it is evenly distributed. Slight tapping with a babbitt hammer will help impellers to break loose. The above procedure when carefully done, will be found to lift the impeller bore free of the shaft, allowing easy removal. At no time attempt to force the impeller. Assembling of the parts is the same as dismantling in reverse order. Make sure that all parts are carefully cleaned and that all parts are in good repair. When-assembling, replace all gaskets, taking care to use the same material and thickness at the case parting. Never use old gaskets. SPARE PARTS: It Is recommended that spare parts be purchased as an insurance against costly delays. The service in which the particular pump is used will determine the number of parts which may be required. The minimum parts for any Type "S" Pump should be, one ball bearing, one set of radial bear­ings, one set of shaft sleeves, and one set of packing. Time may be saved by carrying a complete rotating element In stock. When ordering repair parts, give SERIAL NUMBER of the pump stamped on the nameplate. Also the PART NUMBER and PART LIST DRAWING NUMBER. Factory trained service men are available at Los Angeles, Berkeley, Fresno, California; Houston, Texas; Chicago, Illinois and New York. * * * * * In str. S - Page 3