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40-700 3”-10”

40-700 3”-10”. Modification Overview. Production of the 40-700 series began in 1993 and is current. The 40-700 (RPDA) utilizes a ¾” 40-200 for the bypass assembly. Check Cover Removal. Cover is o-ring sealed.

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40-700 3”-10”

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  1. 40-7003”-10”

  2. Modification Overview • Production of the 40-700 series began in 1993 and is current. • The 40-700 (RPDA) utilizes a ¾” 40-200 for the bypass assembly.

  3. Check Cover Removal • Cover is o-ring sealed. • Loosen bolts 3/8”. Spring load is now released from the cover and retained by the check assembly. ** Verify spring load before removing all the bolts.

  4. Check Valve Removal • Center stem guided check assembly. • Slide subassembly straight out of seat and body.

  5. Check Seat Removal • 3”-8” sizes are threaded into the body and o-ring sealed. **A special tool is required to remove the seat. • 10” size is bolted into the body and o-ring sealed.

  6. Check Disc Replacement • 3”-6” remove the nut and retaining plate. • 8”-10” remove the retaining plate bolts and retaining plate.

  7. Check Valve Reassembly Notes • Reassemble check valves in reverse order. • Apply lubricant to o-rings.

  8. RV Cover Removal • RV cover is sealed by the diaphragm. • No spring load on cover. • Remove outer diaphragm. • 8”-10” the diaphragm is an integral part of the RV module.

  9. RV Module Removal • Module is o-ring sealed. • Grasp the diaphragm plate and pull the module straight out of the body.

  10. RV Seat Removal • Unless damaged there is no need to remove the RV seat. • RV seat is threaded and o-ring sealed.

  11. RV Disc Replacement • Holding the module firmly, remove the screw and retaining washer. • Remove the seat disc.

  12. Disassemble RV Module • Module is spring loaded. • Holding the diaphragm plate firmly, remove the screw or bolt.

  13. Disassemble RV Module • Remove the bushing from the stem. • Remove the stem o-ring.

  14. RV Reassembly Notes • Replace and lubricate o-rings. • Reassemble in reverse order. • Push RV module straight into body. • Make sure diaphragm does not cover hole for sensing line.

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