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• V2"MODEL MAINTENANCE CHECK VALVE AND O-RING MAINTENANCE flatside of the retaining plate against the intermediate. Place a 1. Plush the pump to be certain all corrosives or hazardous materi- lip seal (40)with the cup facing out.in the groove of the end spac- als are removed or diluted. er(14). Also position the o-ring (42) in the o-ring groove of the 2. Remove the air supply line, suction and discharge lines. If the and spacer. Push that assembly into the intermediate with lip seal pump is bolted to a supporting stand, unbolt the pump and take it end first. Alternately assemble o-ring then spacer, a-ring then to a clean workbench for disassembly. spacer until four o-rings and three spacers are assembled in the in- 3.. Turn the pump over so that it is resting on the discharge mani- te`rmediate. Al this time an o-ring is the last part in the bore. fold (21) flanges. Remove tfie four nuts (19) and waaliers (10). 10. Next push the pilot sleeve into the intermediate being careful Leave the bolts(35)in place. Lift manifold assembly from pump. to keep it centered and avoid gouging or cutting the o-rings. As- o, If further disassembly of the manifold assembly is necessary, semble the lip seal and o-ring into the remaining end spacer and remove the eight manifold nuts (19), washers (10), and bolts(20). push into (he intermediate with the lip seal end facing out. -Affix - Inspect O-rings for cracks, if damaged, replace. Use Teflon paste the remaining retaining plate to the intermediate - flat side against to enhance seal. Inlet and outlet manifolds (either single or dou- intermediate. bie) should be lightly reassembled with the nuts applied to the 11. Clamp the square nut portion of the outer diaphragm plate in a bolts from the inside of the manifold, except for the bolts closest vise, and assemble a diaphragm, overlay (optional) and inner dia- to the mounting feet. In this case, the nuts assemble next to the phragm plate over the stud. Screw one half of the diaphragm rod mounting feet. Before tightening the manifold nuts, place the onto the outer diaphragm plate stud. Repeat for the oppositie side. manifold on a flat surface with the flange flats of the elbows on the flat surface. Wiggle the elbows to be sure that both flanges are up LIP SEAL against the flat surface. Tighten the joints in a cross corners pat- I Item 40 tern, checking to be certain the flange flats are still flat against I END SPACER the flat surface. 'Tighten the flange bolts until the flanges touch Item t4 (l0 ft-pounds) O-RING 5. To inspect valve seats (26) and O-rings (38) Remove the ball Item 42 PILOT SLEEVE and gently prying carefully on the inside diameter of the seat.In- item 45 spect for cracks, if damaged replace. (Note: 'Teflon O-rings con- ! form to their origianl groove and cannot be reused unless they are l\ replaced in exactly the same position.and location). 6. Lift the pump intermediate (34) with the outer chambers (28) still attached from the inlet manifold and set it aside.Inspect suc- tion valve seat,O-rings, and balls replace if needed. a DIAPHRAGMS AND PILOT SLEEVE DIAPHRAGM ROD MAINTENANCE Item 15 7. Diaphragms(3 1) and overlays (30 optional) are accessed by re- O-RING Item 46 moving the bolts in the V-band clamps. With the chambers (28) SPACER SPI off, the diaphragms may be removed by clamping diaphragm outer P47 \ f plate (29)on one end lightly in a vise. Unscrew the outer plate on hern the other end of the intermediate. While the assembly is still in DIAPHRAGM ROD the vise, grip the diaphragm and intermediate firmly and give the Item 13 assembly a twist to remove the remaining diaphragm assembly. Shown above is the pilot sleeve and diaphragm rod assem- The diaphragm rod and pilot sleeve assembly will remain within blies. The pilot sleeve is "locked" in position by the two dia- the intermediate. (Since the diaphragm rod has two halves it is phragm rod halves. The diaphragm rod can be removed from possible for the rod to disassemble in the center. If this happens the intermediate by removing the retaining plates and pulling pull each half of the rod assembly out and unscrew the rod from the the rod through. The and spacer and pilot sleeve will also outer plate.) If inspection of the pilot sleeve assembly is not reu- come out in the process. qired, go to step 11. 8. To evaluate or replace the pilot sleeve assembly,remove one of the retaining plates (41) by unscrewing the three screws (24).Push 12. With one half of the diaphragm rod assembly in the vise, slip the diaphragm rod through the intermediate. The pilot sleeve will the intermediate over the diaphragm rod. Them push the second remain on the diaphragm.rod. Push the entire stack of o-rings and half of the diaphragm rod assembly into the opposite end of the spacers out of the intermedaite- Wash, inspect o-rings for wear, intermediate. Tighten the outer diaphragm plate nut with a wrench nicks or other damage. Replace any damaged or worn compo- to 6 foot pounds. Continue with steps 13 through 18. nents. The diaphragm rod has two halves and must be dissassem- 13. Place an outer chamber(28)over the intermediate assembly.If b)ed to replace the pilot spool and/or to reassemble pump. the air valve assembly has been removed, be certain intermediate DJOTEi Use only a non-synthetic, petroleum based is properly oriented with outer chambers. The top of the interme- lubricating grease without EP additives. diate has a single vertical air passage slot on the air valve mount- Reconunendarions:Carleton-Stuart Corp.MagnaLube G ing face. Outer chamber check ball valve cavity points downward. Lubriplate Multilube A or 14. Place a chamber over the intermediate assembly with the ball check cavity in the chamber facing in the same direction as the ex- Lubriplate Gear Shield Heavy haust port in the air valve. If the air valve assembly has been re- 9.To reassemble, lubricate all surfaces of the o-rings, spacers, and moved,place the check valve cavity 90 degrees from the air valve seals with grease. Lubricate the center bole of the intermediate. mounting pad Preassemble one side of the clamp with nut. Screw Assemble one retaining plate (41)to the intermediate with the over stud about 112". Page 6 . 7-08-0