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40-600 3”-10”

40-600 3”-10”. Modification Overview. Production of the 40 series began in 1992. The 3”- 10” 40-600 was discontinued in 2003. The 40-600 used a ¾” 40-100 for the bypass assembly. Check Cover Removal. Cover is o-ring sealed.

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40-600 3”-10”

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  1. 40-6003”-10”

  2. Modification Overview • Production of the 40 series began in 1992. • The 3”-10” 40-600 was discontinued in 2003. • The 40-600 used a ¾” 40-100 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.

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