9509502½”-10”2½”-10”

Modification OverviewModification Overview

Production of the 950 (21/2”-10”) began in Production of the 950 (21/2”-10”) began in 1990 and was discontinued in 2004.1990 and was discontinued in 2004.

Check Cover RemovalCheck Cover Removal

Cover is o-ring Cover is o-ring sealed.sealed.

Loosen bolts 1/2”. Loosen bolts 1/2”. The spring load is The spring load is now released from now released from the cover and the cover and retained by the check retained by the check subassembly.subassembly.

** Verify spring load ** Verify spring load before removing all before removing all the bolts.the bolts.

Check Valve RemovalCheck Valve Removal

Center stem guided Center stem guided check assembly.check assembly.

Disc & spring Disc & spring subassembly.subassembly.

Slide subassembly Slide subassembly straight out of seat straight out of seat and body.and body.

Check Seat RemovalCheck Seat Removal

Seats are bolted into Seats are bolted into the body and o-ring the body and o-ring sealed.sealed.

Remove the bolts and Remove the bolts and pull the seat straight pull the seat straight out of the body.out of the body.

4”-10” - Inspect 4”-10” - Inspect plastic guide bushing plastic guide bushing in center of seat.in center of seat.

Check Disc ReplacementCheck Disc Replacement

Remove retaining nut Remove retaining nut and disc retainer.and disc retainer.

Check Valve Reassembly NotesCheck Valve Reassembly Notes

Reassemble checks Reassemble checks in reverse order.in reverse order.

Lubricate o-rings.Lubricate o-rings.