Assessments - 3, GPA: 3.3 ( )

Fabricante : Graco Inc. Arquivo Tamanho: 281.35 kb Arquivo Nome : Língua de Ensino:

Disconnect the two leads from the ON/OFF switch terminals. See Fig 11. 2. Remove the boot (36). Pull the switch (34) out of the base. See Fig 10. 3. Install the new switch, aligning the tab in the base with the slot in the switch. See Fig 10. Install the boot. 4. Connect a pressure switch lead to the power-out terminal, and a jumper wire lead to the power-in terminal of the new ON/OFF switch. WARNING To maintain grounding continuity in your system, and reduce the risk of electric shock, be sure the green ground wire from the power supply cord is properly connected to the grounding screw (83) as instructed in Step 4, above. Also be sure the screw (25) is tightly screwed into the base. See Fig 10 and 11. Power Supply Cord (See Fig 11) 1. Disconnect the power supply cord leads from the terminal strip (71) by loosening the three screws on the cord side of the strip. See Fig 11. 2. Loosen the screw in the side of the strain relief bushing (38) and pull out the cord. 3. Strip approximately 6 mm (1/4 in.) of insulation off each end of the new cord. Install the new cord and connect the leads to the terminal strip as shown in Fig 11, being sure that each color lead is across from a like-colored lead. 4. Install an appropriate, three-pin plug on the other end of the power supply cord. 28 65 EEEEEEEEEEEEEEEEE71 70 BLUE BROWN YELLOW/GREEN 33b 34 38 PRESSURE SWITCH (2) LEADS 25 41 83 BLACK RED MOTOR LEADS 39 SCREW JUMPER WIRE Fig 10 Fig 11 . 307–760 REPAIR Pressure Switch (See Fig 11, 12 & 13) 1. Disconnect the pressure switch leads from the ON/ OFF switch and from the rectifier. See Fig 11. 2. Remove the front cover (23). See Fig 13. 3. Unscrew the retainer (14) and remove the pressure switch (12) and o–ring (12a). See Fig 12. 4. Grease and install a new o–ring (12a) in the pump housing (9). See Fig 12. 5. Slide the retainer (14) over the pressure switch and screw the retainer into the pump housing. Torque the retainer to 6.2–7.4 N.m (55–65 in–lb). See Fig 12. 6. Guide the pressure switch leads through the base. Connect a lead to the power–out side of the ON/OFF switch (34) and a lead to an unmarked terminal on the rectifier (39). See Fig 11. 7. Reinstall the front cover (23). CAUTION To avoid damaging the pressure switch, do not drop it, and do not press on the center of the switch. Inlet Valve (See Fig 13) 1. Unscrew the suction hose (44). Unscrew the inlet valve (3). Remove the gasket (4) and replace it if it is worn. 2. Screw the new valve into the pump housing, torquing to 27–29 N.m (240–260 in–lb). NOTE: To torque the inlet valve, have someone firmly hold the pump housing (9). 2f 10 2e 2d 2c 2b 2a 2 3 9 12a 12 14 TORQUE TO 13.5– 16 N.m (120–140 in-lb.) TORQUE TO 32–34 N.m (280–300 in-lb.) TORQUE TO 6.2–7.4 N.m (55–65 in-lb.) Outlet Valve (See Fig 12) 1. Remove the outlet hose (64). Unscrew the outlet fit-Fig 12 ting (2a) and remove the gasket (2b). 2. Tip the pump forward to remove the ball (2d). 3. Use a 1/4 in. square socket wrench extension to screw out the seat (2e). 4. Use a pointed tool, such as a dentist’s pick, to remove the seal (2f). 5. Thoroughly clean all parts and dry. 6. Tip the pump back. Install a new seal (2f), making sure it lays flat. 7. Install the seat (2e) and torque it to 13.5–16 N.m (120–140 in–lb). 8. Drop in the ball, making very sure it stays there! 307–760 Fig 13 44 9 23 4 3 TORQUE TO 27–29 N.m (240–260 in-lb.) CAUTION Do not drop the ball into the pressure switch cavity (12). If it does, and the outlet fitting (2a) is then installed, the switch will be permanently damaged. 9. Check the ball stop pin in the outlet fitting (2a) for wear, and replace the fitting if necessary. Place a new gasket (2b) around the fitting. The last coil on one end of the spring (2c) is turned in. Place this end on the ball stop pin. Screw the fitting into the pump housing, and torque to 32–34 N.m (280–300 in–lb). 44 47 45 46 Fig 14 11 17 9 D 23 15,16 THREADS TORQUE TO 85 in-lb (9.6 N.m) 11 17 9 D 23 15,16 THREADS TORQUE TO 85 in-lb (9.6 N.m) REPAIR Diaphragm (See Fig 14) LUBRICATE 6. Screw the new diaphragm (17) into the connecting rod just until it bottoms out. Then turn it 1/4 to 1/2 turn (2.7–3.6 N.m [6–8 in–lb]). 7. Apply thread lubricant to the screws (15) and install them with the lockwashers in the pump housing. Torque the screws a little at a time, oppositely and evenly, to 9.8 N.m (85 in–lb). 8. Spin the motor shaft (D) to be sure it turns freely. 9. Reinstall the front cover (23). Priming Valve & Tube (See Fig 15) NOTE: Each new priming valve kit includes a priming tube and fittings. 1. Unscrew the nut (E) of the priming valve (10a), and then unscrew the stem of the handle. 2. Unscrew the priming valve (10a). 3. Wrap the threads of the priming valve with PTFE . tape, and then screw it snugly into the pump housing. The valve handle should be parallel with the angled edge of the housing to avoid interference with the inlet or outlet valves. 4. Slide the nut (10d) and ferrule (10c) onto the tube (10e)...

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