40-50040-500½”- 2”½”- 2”

Modification OverviewModification Overview

Production of the 40-500 PVB began in Production of the 40-500 PVB began in 1991 and was discontinued in 2003.1991 and was discontinued in 2003.

Canopy RemovalCanopy Removal

The canopy is The canopy is secured by two secured by two screws.screws.

Bonnet RemovalBonnet Removal The bonnet is The bonnet is

threaded into the threaded into the body and sealed by body and sealed by an o-ring.an o-ring.

Unscrew the bonnet Unscrew the bonnet counter clockwise.counter clockwise.

There is no spring There is no spring load.load.

Note: If float spring is Note: If float spring is damaged, the bonnet damaged, the bonnet must be replaced.must be replaced.

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 RemovalCheck Valve Removal

Check valve is spring Check valve is spring loaded.loaded.

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

Remove spring and Remove spring and poppet.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

check spring down in check spring down in body.body.

The lip on the retainer The lip on the retainer faces down toward faces down toward the spring.the spring.

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