Évaluations - 2, GPA: 4 ( )

Fabricant : Aurora of America Taille : 260.76 kb Nom Fichier : Langue d'enseignement:

Do not re-use old gaskets or seals. Failure to follow these instructions could result in serious personal injury, death or property damage. Warning: Sudden Start-Up Hazard Disconnect and lockout power source before servicing. Failure to follow these instructions could result in serious personal injury, death or property damage. Warning: Hot Surface Hazard If pumping hot water, insure guards or proper insulation is installed to protect against skin contact to hot piping or pump components. Failure to follow these instructions could result in serious personal injury, death or property damage. MODELS 341A-342A-344A 3 DISASSEMBLY Disassemble only what is needed to make repairs or accomplish inspection. (See Figure 2 for Model 341A, Figure 3 for Model 342A and Figure 3 for Model 344A.) 1. Disconnect and lockout power source to prevent drive unit from being energized during disassembly. 2. Unscrew the two drain plugs (4) from the casing (6). On Model 342A pumps, remove plugs (74 and 75) to drain pump. Also unscrew the two plugs (4) from casing (6). 3. Remove all relief, cooling, flushing or drain lines from pump, including compression connections (1 and 2) and tubing (3). Break suction and discharge connections unless it is intended to remove the power frame or motor assembly and leave casing (6) in the line. On Model 342A pumps, break discharge connections only, unless it is desired to remove base (73). Remove capscrews (39) and lift pump assembly from base (73). Remove gasket (72). 4. On Model 344A pumps, remove the flexible coupling from between the pump and motor. Next unscrew the bolts that hold support(s) (41 and 64) to the base and slide the pump out to be worked on. 5. Remove capscrews (5) and pull casing (6) from bracket (35). Remove gasket (8). 6. Unscrew impeller screw (9) and remove washer (9A), taking care not to damage gasket (9B) or capscrew seal (9C). 7. Slide impeller (11) and impeller key (12) from the shaft, again taking care not to damage gasket (10) located behind impeller. Remove gasket (10). 8. Wearing ring(s) (7 and 16) are pressed into their housings with an interface fit and must be removed with a puller. New ring(s) should be used for reassembly since it is likely that during removal this fit will be lost. Do not remove wearing rings if not being replaced. 9. Impeller wearing rings (optional - 14 and 15) are pressed on and must be cut off if replacement is necessary. If they are turned off in a lathe, take care not to cut into the impeller. 10. Slide sleeve (25) with rotating parts of mechanical seal (27) from the shaft. The sleeve should be carefully cleaned to remove any residue that may be remaining in the seal area. The rubber in seal (27) may have become partially adhered to the sleeve. The sleeve must also be checked for abrasion or corrosion that can occur when fluid residue penetrates between the seal (27) and sleeve (25). The sleeve under the seal may be polished lightly to a 32 RMS finish before reassembly. Do not reuse a pitted sleeve. Pin (61) may be removed if necessary. The mechanical seal (see Figure 1) is a precision product and must be treated as such. During removal, great care must be taken to avoid dropping any part of the seal. Take particular care not to scratch the lapped faces on the washer or the sealing seat. If any wear of the seal faces is noted, it is recommended to replace with a new seal during reassembly. 11. On Model 344A pumps, remove capscrews (39 and 62) and washers (40 and 63) to take off support feet (41 and 64). On Model 341A frame size 143 thru 184-JM only, unscrew capscrews (39) washers (40) and remove support (41) from bracket (35). 12. Unscrew capscrews (32) to remove bracket (35) from frame (57) or motor on Models 341A and 342A. D. Mechanical Seal Removed. CAUTION C. Impeller and Key Removed. B. Casing, Gasket, and Wearing Ring Removed. MODELS 341A-342A-344A 4 13. The seal flexible cup and stationary seat should be pressed out of the bracket (35) and the cavity cleaned of all residue. Make sure that the 1/32 inch radius in the seal seat cavity is not damaged during disassembly since a sharp edge can easily cut the flexible cup during reassembly. 14. On Model 344A pumps, remove key (42) from the shaft and remove slingers (47 and 47A). 15. Unscrew capscrews (48) and remove bearing cap (49). Remove “O” ring (oil lubed only) (50) and retainer ring (52). 16. Slide out shaft (55) and bearings (53 and 54). Since bearings (53 and 54) are press fitted on the shaft, they will have to be pulled or pressed off the shaft. Remove grease seals (51) from frame (57), and bearing cap (49). 17. Remove nameplate (34) and screws (33) only if replacement is needed. REASSEMBLY Reassembly will generally be in reverse order of disassembly. If disassembly was not complete, use only those steps related to your particular repair program. 1. Press grease seals (51) into frame (57). (344A) 2. Press bearings (53 and 54) onto shaft (55). Snap retainer ring (52) into place. (...

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