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F-2) Impeller and Volute Service: <br />F-2.1) Disassembly and Inspection: <br />To clean out volute (1) or replace impeller (33), disconnect <br />ower, remove hex bolts (26), and lockwashers (12), <br />Articaliy lift motor and seal plate assembly from volute <br />(1) see Figure 5. Clean out body if necessary. Clean and <br />examine impeller (33), for pitting or wear and replace if <br />required, inspect gasket (36) and replace if cut or damaged. <br />If the impeller (33) needs replacing, place a flat screwdriver <br />in the slot of the end of the shaft to hold the shaft stationary <br />while unscrewing the jam nut (66) and impeller (33). <br />MOTOR END <br />(INBOARD END) <br />/n <br />IN <br />S <br />ASS <br />-2.2) Reassembly: <br />To install impeller (33), clean the threads with thread <br />locking compound cleaner. Apply removable Loctite(D 603 <br />or equivalent to shaft threads. Screw impeller onto the shaft <br />hand tight while using a screwdriver in the slot at the end of <br />the shaft to hold it stationary. Apply thread locking compound <br />(60) to shaft threads. Then install jam nut (66) and torque to <br />40 ft. lbs. <br />It is important that the spring of the lower shaft seal (28) <br />seats in the hub of the impeller (33). Rotate impeller to check <br />for binding. Position gasket (36) on volute flange and position <br />impeller and motor housing on volute (1). Position lockwasher <br />(12) on cap screw (26) and screw into volute (1). Torque to <br />100 in -lbs. Check for free rotation of motor and impeller. <br />F-3) Shaft Seal Service: <br />!ACAUTIONI - dandle seal parts with extreme care. <br />DO NOT scratch or mar lapped surfaces. <br />F-3.1) Disassembly and Inspection: <br />Outer Seal (Ail Units) - To expose shaft seal (28) for <br />examination, disassemble volute and impeller as outlined in <br />paragraph F-2.1. if further repair is required. remove retaining <br />ring (28d), spring (28c) and rotating member (28b) from shaft <br />(see Figure 6 & 7). Examine all seal parts and especially <br />contact faces. Inspect seal for signs of wear such as uneven <br />wear pattern on stationary members: chips and scratches <br />n either seal face. DO NOT interchange seal components; <br />replace the entire shaft seal (28). If replacing seal, remove <br />stationary (28a) by prying out with flat screwdriver. <br />OI <br />S <br />ASS <br />(INBOARD END) <br />STATIONARY (28a) <br />ROTATING MEMBER (28b) <br />SPRING (28c) <br />RETAINING RING (28d) <br />PUMP END <br />(OUTBOARD END) <br />FIGURE 6 - DOUBLE SEAL <br />SNAP RING (132) <br />STATIONARY (28a) <br />ROTATING MEMBER (28b) <br />SPRING (28c) <br />RETAINING RING (28d) <br />Inner Seal (DS Units Only)- To expose inner shaft seal <br />(28) for examination, remove outer seat as outlined above. <br />Remove socket head cap screws (64). Lift cuter seal plate <br />(29) and square -ring (27) from inner seal plate (5) see Fioure <br />8. If further repair is required, remove snap ring (32), retaining <br />ring (28d), spring (28c) and rotating member (28b) from shaft. <br />Examine as outlined in outer seal paragraph. if replacing sea:, <br />remove stationary (28a) by prying out with fiat screwdriver. <br />12 <br />