Assessments - 4, GPA: 4.5
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symbol. Use all the parts in the kit for the best results. Disassembly 1. Relieve the pressure. 2. With a Torx (T20) screwdriver or 7 mm (9/32 in.) socket wrench, remove the six screws (103), air valve cover (102), and gasket (104). See FIG. 6. 103 102 104. TI4682b FIG. 6 3. Move the valve carriage (105) to the center position and pull it out of the cavity. Using a needle-nose pliers, pull the pilot block (116) straight up and out of the cavity. See FIG. 7. 116.105. TI4616b FIG. 7 4. Pull the two actuator pistons (111). Remove the u-cups (110) from the pistons. Pull the pilot pins (114). Remove the o-rings (115) from the pilot pins. See FIG. 8. TI4617b 110.111 114 115. FIG. 8 16 310622L Service 5. Inspect the valve plate (108) in place. If damaged, 3. Install an o-ring (115) on each pilot pin (114). use a Torx (T20) screwdriver or 7 mm (9/32 in.) Grease the pins and o-rings. Insert the pins into the socket wrench to remove the three screws (103). bearings, narrow end first. See FIG. 10. Remove the valve plate (108). See FIG. 9. TI4618c 103 108. FIG. 9 6. Inspect the bearings (112, 117) in place. See Parts on page 31. The bearings are tapered and, if damaged, must be removed from the outside. This requires disassembly of the fluid section. See page 23. 7. Clean all parts and inspect for wear or damage. Replace as needed. Reassemble, page 17. Reassembly 1. If you replaced the bearings (112, 117), reinstall as explained on page 24. Reassemble the fluid section. 2. Install the valve plate (108) in the cavity, seal down. Install the three screws (103), using a Torx (T20) screwdriver or 7 mm (9/32 in.) socket wrench. Tighten until the screws bottom out on the housing. See FIG. 9. TI4617b 115.114 110.111 FIG. 10 4. Install u-cups (110) on each actuator piston (111), so the lips of the packings face the narrow end of the pistons. See FIG. 10. 5. Lubricate the u-cups (110) and actuator pistons (111). Insert the actuator pistons in the bearings, wide end first. Leave the narrow end of the pistons exposed. See FIG. 10. 6. Grease the lower face of the pilot block (116) and install so its tabs snap into the grooves on the ends of the pilot pins (114). See FIG. 11. 7. Grease the lower face of the valve carriage (105). See FIG. 11. 310622L 17 102 103 102 103 Service 8. Install the valve carriage (105) so its tabs slip into 9. Align the valve gasket (104) and cover (102) with the grooves on the narrow end of the actuator pis-the six holes in the center housing (101). Secure tons (111). See FIG. 11. with six screws (103), using a Torx (T20) screwdriver or 7 mm (9/32 in.) socket wrench. Torque to 50-60 in-lb (5.7-6.8 N•m). See FIG. 12. TI4616b 116.105. 104. TI4682b FIG. 11 FIG. 12 18 310622L Service Check Valve Repair 128 Disassembly 132a Reference numbers with an asterisk (*) are replacement parts. For a complete list of replace-*240 ment parts see Parts, page 26. 2XA 132c *240 *541 2XB *240 1. Relieve the pressure. Disconnect all hoses. 132b 2. Remove the pump from its mounting. Drain. 3. From the outlet manifold, remove both upper clamps (132a). 4. Remove outlet manifold leaving elbows (128), gaskets (129), clamps (130), and tee (339) assembled. 5. For 3A Ball Check pumps: remove ball gasket (240). Remove middle clamp (132c) and ball stop housing (2XA). Remove middle gasket (240) and ball (541). Remove lower clamp (132b), seat (2XB), and gasket (240). Clean all parts and inspect for wear or damage. Replace parts as needed. TI8768a FIG. 13 129* 130 3A Ball Check Assembly 310622L 19 Service For Sanitary Ball Check pumps: remove ball gasket (242) and ball (541). Remove lower clamp (132b), seat (233), and gasket (240). Clean all parts and inspect for wear or damage. Replace parts as needed. 129* 339* 130 331* TI8769a 128 132a *242 *541 233 *240 132b Sanitary Ball Check Assembly FIG. 14 For Flapper Check pumps: remove gasket (240). Remove middle clamp (232) and housing (252). Remove middle gasket (250), flapper retainer (253), and flapper valve (251). Remove lower clamp (132b), lower flapper housing (248), and gasket (240). Clean all parts and inspect for wear or damage. Replace parts as needed. 129* 130 132a 240* 252 232* 250 253 251 248 240* 132b TI8770a Flapper Check Assembly FIG. 15 6. Disassemble the outlet manifold. Remove clamps (130), tee (339), gasket (129), and elbow (128). Clean all parts and inspect for wear or damage. Replace parts as needed. 20 310622L 7. Repeat for inlet manifold. Reassembly Lubricate clamps, clamping surfaces, and gaskets with waterproof, sanitary lubricant. 1. Reassemble inlet and outlet fluid manifolds in reverse order. See step 6. Tighten clamps handtight. 2. Reassemble ball or flapper check assembly in reverse order. See step 5. Tighten clamps handtight. For flapper check, make sure flapper check (251) is placed properly in housing (248) groove and flapper retainer (253) is aligned with housing groove. Ensure that the flapper check moves freely. Service Diaphragm Repair Tools Required • Tor...
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