765765½”- 2”½”- 2”

Modification OverviewModification Overview

Production of the 765 began in 1975 and Production of the 765 began in 1975 and is current.is current.

Canopy RemovalCanopy Removal

The canopy is The canopy is secured to the bonnet secured to the bonnet with a lock nut.with a lock nut.

Bonnet RemovalBonnet Removal

½”-11/4”: The bonnet is ½”-11/4”: The bonnet is threaded into the body threaded into the body and sealed by an o-ring.and sealed by an o-ring.

No spring load.No spring load.

11/2”-2”: The bonnet is 11/2”-2”: The bonnet is bolted to the body and bolted to the body and sealed by an o-ring.sealed by an o-ring.

There is a slight spring There is a slight spring load on the bonnet.load on the bonnet.

Float Removal and ServiceFloat Removal and Service

The float is free once The float is free once the bonnet has been the bonnet has been removed.removed.

Replace the rubber Replace the rubber seal by pulling it from seal by pulling it from the groove on the the groove on the float.float.

Check Valve Removal ½”-11/4”Check Valve Removal ½”-11/4”

The check valve is The check valve is spring loaded.spring loaded.

Remove the spring Remove the spring retainer by pressing retainer by pressing down and rotating to down and rotating to clear tabs on the clear tabs on the body.body.

Remove spring and Remove spring and poppet.poppet.

Check Valve Removal 11/2”-2”Check Valve Removal 11/2”-2”

The check valve is The check valve is free once the bonnet free once the bonnet is removed.is removed.

Remove the retainer, Remove the retainer, spring and poppet.spring and poppet.

Check Disc ReplacementCheck Disc Replacement

The check disc is free The check disc is free once the retaining once the retaining screw and guide are screw and guide are removed.removed.

Check Seat ReplacementCheck Seat Replacement

The check seat is part The check seat is part of the body.of the body.

If the seat is damaged If the seat is damaged the assembly must be the assembly must be replaced.replaced.

Reassembly NotesReassembly Notes

Reassemble in Reassemble in reverse order.reverse order.

Place large end of Place large end of spring down toward spring down toward the check poppet.the check poppet.

Make sure bonnet Make sure bonnet guide is inserted into guide is inserted into center of float.center of float.