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40-100 ¾”-2”

40-100 ¾”-2”. Modification Overview. Production of the 40-100 series began in 1989. Early models of ¾”-2” 40-100 series did not always have replaceable check seats. In 1994 replaceable seats became standard.

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40-100 ¾”-2”

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  1. 40-100¾”-2”

  2. Modification Overview • Production of the 40-100 series began in 1989. • Early models of ¾”-2” 40-100 series did not always have replaceable check seats. In 1994 replaceable seats became standard. • The ¾-2” 40-100 DCA was produced in both a wye pattern body design and a top entry design. The wye pattern was discontinued in 2002.

  3. Check Cover Removal • Cover is threaded into body and o-ring sealed. • Cover is spring loaded. • Loosen cover with wrench, then remove by hand while holding firmly against spring pressure.

  4. Check Valve Removal • Poppet style check valve. • The poppet and spring are free once the cover is removed.

  5. Check Seat Removal • Seats are threaded and o-ring sealed. • A “special tool” is needed for removal.

  6. Check Disc Replacement • Remove the screw and disc washer from poppet.

  7. Check Valve Reassembly Notes • Inspect and clean the guide bore on the cover. • The stem must move freely in the guide bore. • Reassemble in reverse order.

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