LF886VLF886V2 1/2”-10”2 1/2”-10”

Modification OverviewModification Overview

Production of the 2½” – 10” sizes began in 2014.Production of the 2½” – 10” sizes began in 2014.

The LF886V utilizes a Type 2 bypass (Model The LF886V utilizes a Type 2 bypass (Model LF619 single check).LF619 single check).

Check Cover RemovalCheck Cover Removal

Cover is bolted and Cover is bolted and

o-ring sealed.o-ring sealed.

There is a slight There is a slight spring load on cover.spring load on cover.

Check Valve RemovalCheck Valve Removal The check is bolted The check is bolted

through the body and through the body and sealed by an o-ring.sealed by an o-ring.

Locate and remove the Locate and remove the four ½” lock nuts on the four ½” lock nuts on the “outside”“outside” of the body. of the body.

Remove the complete Remove the complete check assembly straight check assembly straight out of the body.out of the body.

Disassemble Spring ModuleDisassemble Spring Module

Spring tension is Spring tension is captured.captured.

Remove the retaining Remove the retaining clip and hinge pin clip and hinge pin from the arm from the arm assembly.assembly.

Check Disc ReplacementCheck Disc Replacement

Remove the 5/16” Remove the 5/16” retaining nuts.retaining nuts.

The check disc is free The check disc is free once the retaining plate once the retaining plate has been removedhas been removed

Check Seat RemovalCheck Seat Removal

The seat and arm The seat and arm assembly is free assembly is free when the check is when the check is removed from the removed from the body.body.

Inspect bushings and Inspect bushings and hinge pins for wear.hinge pins for wear.

Check Valve Reassembly NotesCheck Valve Reassembly Notes

Reassemble in Reassemble in reverse order.reverse order.

Lubricate the seat Lubricate the seat and stud o-rings.and stud o-rings.

Install and tighten the Install and tighten the lock nuts on the lock nuts on the outside of the body.outside of the body.

Check Valve Reassembly NotesCheck Valve Reassembly Notes

The spring module is The spring module is positioned by the positioned by the cover.cover.

Make sure the pivot Make sure the pivot bearing is resting in bearing is resting in the pivot socket on the pivot socket on the cover.the cover.

RV Cover RemovalRV Cover Removal

Remove external Remove external sensing line.sensing line.

RV cover is sealed by RV cover is sealed by the diaphragm.the diaphragm.

No spring load on No spring load on cover.cover.

Remove the hex bolts Remove the hex bolts with a #8 hex key.with a #8 hex key.

RV Cover RemovalRV Cover Removal

RV cover is sealed by RV cover is sealed by the diaphragm.the diaphragm.

The diaphragm is free The diaphragm is free once the cover is once the cover is removed.removed.

RV Module RemovalRV Module Removal Module is o-ring Module is o-ring

sealed.sealed. Pull module straight Pull module straight

out of body.out of body.

* Grasp the module * Grasp the module (button) with one (button) with one hand and insert hand and insert fingers (other hand) fingers (other hand) into RV port and into RV port and apply force to the seat apply force to the seat disc.disc.

* Do not twist module.* Do not twist module.

RV Seat RemovalRV Seat Removal

RV seat is mounted RV seat is mounted between the RV between the RV housing and the RV housing and the RV adapter.adapter.

Remove the 4 nuts Remove the 4 nuts and bolts on the and bolts on the adapter and remove adapter and remove housing.housing.

Seat is o-ring sealed.Seat is o-ring sealed. Pull the seat straight Pull the seat straight

out.out.

Disassemble RV ModuleDisassemble RV Module

Place the module on Place the module on a flat surface with a flat surface with lower guide facing up.lower guide facing up.

Hold the main stem Hold the main stem with one hand and with one hand and unscrew the lower unscrew the lower guide.guide.

Disassemble RV Module Disassemble RV Module

With lower guide With lower guide removed, place the removed, place the module upside down module upside down on a clean surface.on a clean surface.

Remove center of Remove center of protective sticker protective sticker (Save).(Save).

Hold the button firmly Hold the button firmly and loosen screw.and loosen screw.

* Button is spring * Button is spring loaded.loaded.

Disassemble RV ModuleDisassemble RV Module

Remove the screws Remove the screws from the stainless from the stainless steel inner diaphragm steel inner diaphragm retainer.retainer.

Remove the plastic Remove the plastic inner diaphragm inner diaphragm plate.plate.

Disassemble RV ModuleDisassemble RV Module

The main stem and The main stem and upper bushing are upper bushing are free once the inner free once the inner diaphragm plate has diaphragm plate has been removed.been removed.

Inner Diaphragm ReplacementInner Diaphragm Replacement Position the bead of Position the bead of

the inner diaphragm the inner diaphragm into the groove of the into the groove of the plastic upper guide.plastic upper guide.

Place inner plate over Place inner plate over diaphragm and press diaphragm and press into position.into position.

Inner Diaphragm ReplacementInner Diaphragm Replacement

Secure the diaphragm Secure the diaphragm retainer and replace retainer and replace screws.screws.

Spring / Button ReplacementSpring / Button Replacement

Position flow washer Position flow washer on diaphragm with the on diaphragm with the cross channels facing cross channels facing up.up.

Place the spring over Place the spring over the upper guide. the upper guide.

Place button on Place button on spring and hold down spring and hold down firmly.firmly.

Replace flow screw.Replace flow screw. Reposition center Reposition center

label piece.label piece.

RV Disc ReplacementRV Disc Replacement

Replace the RV disc Replace the RV disc in main stem.in main stem.

Replace the lower Replace the lower stem guide.stem guide.

Replace and lubricate Replace and lubricate o-ring on main guideo-ring on main guide

RV Reassembly NotesRV Reassembly Notes

Push the RV module Push the RV module straight into body.straight into body.

** Do not twist.** Do not twist.

Replace outer Replace outer diaphragm with the diaphragm with the bead positioned in the bead positioned in the groove of the body.groove of the body.

Install cover.Install cover.