Mueller Centurion series Instruction Manual

Customer Service Center

Decatur, Illinois

800.423.1323

www.muellercompany.com

moreinfo@muellercompany.com

Reliable Connections

Improved

And

Centurion®

Fire Hydrants

Replacing Trafc

Flange And Stem

Coupling

MUELLER®

opERating instRUctions ManUaL

TABLE OF CONTENTS PAGE

Improved Fire Hydrant –

Replacing Trafc Flange and

Brass Stem Coupling

(All Models Prior to 1962) 2-3

Improved Fire Hydrant –

Replacing Trafc Flange and

Brass Stem Coupling

(Sealed Oil Reservoir 1962 Style) 4-5

Improved Fire Hydrant –

Replacing Trafc Flange and

Steel Stem Coupling

(Sealed Oil Reservoir 1962 Style) 6-7

Centurion Fire Hydrant –

Replacing Trafc Flange and

Stem Coupling 8-9

Notes 10-11

WARNING: Before working on, or disassembling the Hydrant (including removing any bolts(s) holding the Hydrant together), shut off gate valve to isolate

Hydrant from main water source. Loosen (do not remove) one nozzle cap two turns and check for water under pressure inside Hydrant - bleed off any pressure, then

remove nozzle cap completely. Open Hydrant main valve completely. A continuous ow of water, no matter how slight, indicates Hydrant is not properly isolated from

the main water supply, and that problem must be corrected before any Hydrant disassembly can proceed. Disassembly of Hydrant with pressurized water acting

against the main valve could result in unexpected ejection of Hydrant parts, debris or high-pressure water stream, which could cause serious bodily injury.

WARNING: Failure to shut off gate valve to isolate Hydrant from main water source can result in serious bodily injury.

Follow instructions at the bottom of page 1 before attempting any repairs.

MUELLER®Improved Fire Hydrant

Replacing Trac Flange and Brass Stem Coupling (All Models Prior to 1962)

Turn Stem Coupling and Upper Stem

so that slot in Stem Coupling aligns

with the tongue and groove of Stems.

Hold Upper Stem in alignment and

screw Stem Coupling upward until

tongue and groove of Stems rmly lock

together. Tighten with wrench. With

Stem Coupling in place, slide Sleeve

downward so that lower end of Sleeve

surrounds upper end of Stem Coupling.

Be sure Sleeve projections t into Stem

Coupling slots. With Sleeve in place,

tighten set screw in Sleeve.

Remove Bonnet Assembly, Stufng Box,

and Stem from Upper Barrel. Before

removing Stem from Stufng Box,

lubricate Brass Sleeve and slide Sleeve

over the threaded area of the Stem to

prevent damage to the O-rings.

Remove damaged Coupling and

Sleeve. Screw new Stem Coupling

onto Lower Stem down against

shoulder. Slip Sleeve over lower end of

Upper Stem.

NOTE: If Upper Stem of Hydrant

is 11/4” In diameter, cut sleeve as

Indicated by lettering on sleeve.

Screw Upper Stem into Stem Coupling

until it contacts the Lower Stem.

Place Flange Gasket on exposed

Flange of Lower Barrel. Place Upper

Barrel carefully in position on Lower

Barrel. Be sure that it is concentric

with Lower Barrel and the gasket is

centered. Bolt the two halves of Trafc

Flange into place with bevel on outer

edge downward and with Trafc Flange

snugly tting around Lower Barrel.

MUELLER Improved Hydrant with

Upper Barrel knocked over by truck.

Note broken pieces of Trafc Flange

lying on ground.

EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.

Tools: Wrench, A-311 Operating Wrench, A-366 Brass Sleeve, MUELLER Hydrant Lubricant.

MUELLER®Improved Fire Hydrant

Replacing Trac Flange and Brass Stem Coupling (All Models Prior to 1962)

8. Turn Operating Nut in the

closing direction to make

sure Main Valve is closed, then in the

opening direction approximately 1/4

turn to relieve tension on the operating

mechanism.

Replace Bonnet. Turn Operating Nut in

closing direction to engage stem. If

Bonnet has ller plug, make sure that

the ller plug hole is aligned with the

offset portion of the Oil Reservoir. Bolt

in place.

EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.

Tools: Wrench, A-311 Operating Wrench, A-366 Brass Sleeve, MUELLER Hydrant Lubricant.

Check Stufng Box gasket. Lubricate

Brass Sleeve. Slide Sleeve over

threaded area of Stem to protect O

rings from damage by threads. Place

Stufng Box plate in position and bolt

to Barrel. Remove Brass Sleeve. Pour

MUELLER Hydrant Lubricant into Oil

Reservoir until 3/4” from top.

MUELLER®Improved Fire Hydrant

Replacing Trac Flange and Brass Stem Coupling (Sealed Oil Reservoir 1962 Style)

MUELLER Improved Hydrant with

Upper Barrel knocked over by truck.

Note broken pieces of Trafc Flange

lying on ground.

Unbolt and remove broken Trafc

Flange from Upper Barrel. Remove

Weather Cap, Hold Down Nut, and

Operating Nut from Bonnet. Lubricate

Brass Sleeve and slide over threaded

Stem end to prevent O-ring damage.

Unbolt Bonnet from Upper Barrel. Slide

Upper Stem out of Bonnet. Remove

damaged Stem Coupling and Sleeve

from Upper and Lower Stem.

Place new Stem Coupling sleeve part

onto Upper Stem.

NOTE: If Upper Stem of Hydrant

is 11/4” In diameter, cut sleeve as

Indicated by lettering on sleeve.

Screw new Stem Coupling part onto

Lower Stem as far as threads permit.

Screw Upper Stem into Stem Coupling

until it contacts the Lower Stem.

WARNING: Failure to shut off gate valve to isolate Hydrant from main water source can result in serious bodily injury.

Follow instructions at the bottom of page 1 before attempting any repairs.

EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.

Tools: Wrench, A-311 Operating Wrench, A-366 Brass Sleeve, MUELLER Hydrant Lubricant.

Turn Stem Coupling and Upper Stem

so that slot in Thimble aligns with the

tongue and groove of Stems. Hold

Upper Stem in alignment and screw

Stem Coupling upward until tongue

and groove of Stems rmly lock

together. Tighten with wrench. With

Stem Coupling in place, slide Sleeve

downward so that lower end of Sleeve

surrounds upper end of Stem Coupling.

Be sure Sleeve projections t into Stem

Coupling slots. With Sleeve in place,

tighten set screw in Sleeve.

1. 3.

Place Flange gasket on exposed

Flange of Lower Barrel. Place Upper

Barrel carefully in position on Lower

Barrel. Be sure that it is concentric

with Lower Barrel and that gasket is

centered. Bolt the two halves of Trafc

Flange into place with bevel on outer

edge downward and with Trafc Flange

snugly tting around Lower Barrel.

Check Bonnet Gasket. Attach the

Brass Sleeve, if it had been removed,

to Upper Stem and lubricate outside

to protect O-ring seals from thread

damage. Place Bonnet onto Upper

Barrel and assemble Bonnet bolts only

hand tight. Remove Brass Sleeve.

Reassemble Operating Nut* and

remove Oil Plug in side of Bonnet.

Pour MUELLER Hydrant Lubricant into

oil reservoir until it is level with Plug

Replace Oil Plug.

*Tighten hold down nut to 200-300 ft-lbs of

torque. If torque wrench is not available,

use a 3 lb hammer to strike the end of the

A-311 wrench rmly two times to assure the

nut is properly tightened.

Replace Hold Down Nut being sure

O-ring seals are in good condition at

thread shoulder on outside of Hold

Down Nut and on the inside where

contact is made with Operating Nut.

Replace Weather Cap. Tighten Bonnet

Bolts. Check gasket tightness by

opening one hose cap slightly before

opening hydrant to bleed air. Open

Hydrant until Barrel lls with water,

tighten hose cap, open hydrant fully.

Check gaskets, and then turn Operating

Nut to fully closed position.

Turn Operating Nut in the closing

direction to make sure Main

Valve is closed, then in the opening

direction approximately 1/4 turn

to relieve tension on the operating

mechanism.

CAUTION: Always ll the oil reservoir with the Bonnet installed, the Hydrant in its normal upright position, and

the main valve fully closed. If the Hydrant is lled with lubricant under any other circumstances, excess lubricate can

overll the Bonnet and create a pressure lock. This could result in damage to the seals or Bonnet or prevent proper

Hydrant operation.

EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.

Tools: Wrench, A-311 Operating Wrench, A-366 Brass Sleeve, MUELLER Hydrant Lubricant.

MUELLER®Improved Fire Hydrant

Replacing Trac Flange and Brass Stem Coupling (Sealed Oil Reservoir 1962 Style)

5. 7.

MUELLER®Improved Fire Hydrant

Replacing Trac Flange and Steel Stem Coupling (Sealed Oil Reservoir 1962 Style)

1. 3.

MUELLER Improved Hydrant with

Upper Barrel knocked over by truck.

Note broken pieces of Trafc Flange

lying on ground.

Remove stainless steel Cotter Pin from

stainless steel Clevis Pin in Lower

Stem (throw away the old Clevis Pin

and Cotter Pin).

Assemble new Stem Coupling to Upper

Stem with new stainless steel Clevis

Pin and new stainless steel Cotter Pin.

NOTE: “This End Up” Stamped on

Coupling.

Assemble Upper Stem and new Stem

Coupling on to Lower Stem and retain it

with new stainless steel Clevis Pin and

new stainless steel Cotter Pin furnished

with Stem Coupling.

Remove stainless steel Cotter Pin from

stainless steel Clevis Pin. Remove

stainless steel Clevis Pin and Stem

Coupling from Upper Stem. Unbolt and

remove broken Trafc Flange from

Upper Barrel. Remove Weather Cap,

Hold Down Nut and Operating Nut

from Bonnet. Lubricate Brass Sleeve

and slide over threaded Stem End to

prevent O-ring damage. Unbolt Bonnet

from Upper Barrel. Slide Upper Stem

out of Bonnet.

Place Flange Gasket on exposed

Flange of Lower Barrel. Place Upper

Barrel carefully in position on Lower

Barrel. Be sure that it is concentric with

Lower Barrel and that Gasket is

centered. Bolt the two halves of Traf-

c Flange into place with bevel on

outer edge downward and with Trafc

Flange snugly tting around Lower

Barrel.

WARNING: Failure to shut off gate valve to isolate Hydrant from main water source can result in serious bodily injury.

Follow instructions at the bottom of page 1 before attempting any repairs.

EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.

Tools: Wrench, A-311 Operating Wrench, A-366 Brass Sleeve, MUELLER Hydrant Lubricant.

CAUTION: Always ll the oil reservoir with the Bonnet installed, the Hydrant in its normal upright position, and

the main valve fully closed. If the Hydrant is lled with lubricant under any other circumstances, excess lubricate can

overll the Bonnet and create a pressure lock. This could result in damage to the seals or Bonnet or prevent proper

Hydrant operation.

MUELLER®Improved Fire Hydrant

Replacing Trac Flange and Steel Stem Coupling (Sealed Oil Reservoir 1962 Style)

EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.

Tools: Wrench, A-311 Operating Wrench, A-366 Brass Sleeve, MUELLER Hydrant Lubricant.

Replace Hold Down Nut* being sure

O-ring seals are in good condition at

thread shoulder on outside of Hold

Down Nut and on inside where contact

is made with Operating Nut. Replace

Weather Cap. Tighten Bonnet Bolts.

Check Gasket tightness by opening

one hose cap slightly before opening

Hydrant to bleed air. Open Hydrant

until Barrel lls with water, tighten

hose cap, open Hydrant fully. Check

gaskets, and then turn Operating Nut

to fully closed position.

*Tighten hold down nut to 200-300 ft-lbs of

torque. If torque wrench is not available, use

a 3 lb hammer to strike the end of the A-311

wrench rmly two times to assure the nut is

properly tightened.

Check Bonnet Gasket. Attach the Brass

Sleeve, if it had been removed, to Upper

Stem and lubricate outside to protect

O-ring seals from thread damage.

Place Bonnet onto Upper Barrel and

assemble Bonnet Bolts only hand tight.

Remove Brass Sleeve. Reassemble

Operating Nut and remove Oil Plug in

side of Bonnet. Pour MUELLER Hydrant

Lubricant into Oil Reservoir until it is

level with Plug. Replace Oil Plug.

Turn Operating Nut in the

closing direction to make

sure Main Valve is closed, then in the

opening direction approximately 1/4

turn to relieve tension on the operating

mechanism.

7. 8.

MUELLER®Centurion®Fire Hydrant

Replacing Trac Flange and Stem Coupling

Remove stainless steel Cotter Pin from stainless steel Clevis Pin. Remove Clevis

Pin and Coupling from Upper Stem. Unbolt and remove broken Trafc Flange from

Upper Barrel. Remove Hold-Down Nut, Anti-Friction Washer, and Operating Nut

from Bonnet. Lubricate Brass Sleeve and slide over threaded Stem end to prevent

O-ring damage. Unbolt Bonnet from Upper Barrel. Slide Upper Stem out of Bonnet

and remove Brass Sleeve.

Assemble Upper Stem and new Stem

Coupling onto Lower Stem and retain

it with the new stainless steel Clevis

Pin and new stainless steel Cotter Pin

furnished with Stem Coupling.

Remove stainless steel Cotter Pin from

stainless steel Clevis Pin in Lower Stem

(throw away the old Clevis Pin, Cotter

Pin, and old coupling).

Assemble new Stem Coupling to

Upper Stem with new stainless steel

Clevis Pin and new stainless steel

Cotter Pin.

NOTE: “This End Up” Molded on

Coupling.

WARNING: Failure to shut off gate valve to isolate Hydrant from main water source can result in serious bodily injury.

Follow instructions at the bottom of page 1 before attempting any repairs.

EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.

Tools: Wrench, A-311 Operating Wrench, A-366 Brass Sleeve, MUELLER Hydrant Lubricant.

MUELLER®Centurion®Fire Hydrant

Replacing Trac Flange and Stem Coupling

CAUTION: Always ll the oil reservoir with the Bonnet installed, the Hydrant in its normal upright position, and

the main valve fully closed. If the Hydrant is lled with lubricant under any other circumstances, excess lubricate can

overll the Bonnet and create a pressure lock. This could result in damage to the seals or Bonnet or prevent proper

Hydrant operation.

Attach Upper Barrel with new Trafc

Flange Halves (with bevel on outer

edge downward) and Bolts; being sure

Trafc Flange O-ring* is in groove in

Upper Barrel. Tighten Bolts to 60 ft-lbs.

Remove Oil Filler Plug in side of Bonnet.

Pour MUELLER Hydrant Lubricant into

Oil Reservoir until it is level with Oil

Filler Plug Hole. Replace Oil Filler Plug

(see lubrication section on page 8 of the

Mueller Centurion Manual).

Turn Operating Nut in closing direction

to make sure Main Valve is closed

tightly, then turn in opening direction

approximately 1/4 turn to relieve

tension on operating mechanism.

Check Bonnet O-ring* for proper

position and condition. Attach Brass

Sleeve to Upper Stem and lubricate

outside to protect O-ring Seals from

thread damage. Place Bonnet onto

Upper Barrel and assemble Bonnet

Bolts only hand-tight. Remove Brass

Sleeve. Reassemble Operating Nut,

Anti-Friction Washer, and Hold-Down

Nut (snug-tighten). Be sure O-ring

Seals are in good condition at thread

shoulder on outside of Hold-Down Nut

and on inside where contact is made

with Operating Nut.

*To determine correct O-rings for Bonnet

and Ground Line anges, which are similar

in appearance: smaller diameter O-ring is

used at Bonnet ange; larger at Ground line

ange.

EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.

Tools: Wrench, A-311 Operating Wrench, A-366 Brass Sleeve, MUELLER Hydrant Lubricant.

Torque Bonnet Bolts to 40-80 ft-lbs.

Torque Hold-Down Nut to 200-300

ft-lbs. after Bonnet Bolts are tight. Open

Gate Valve. Unscrew one Hose Nozzle

Cap slightly to bleed air. Open Hydrant

fully. Tighten Hose Nozzle Cap when

water starts owing and check all ange

connections for leaks. Turn Operating

Nut to fully closed position and remove

Hose Nozzle Cap to allow Barrel to

drain. Replace Hose Nozzle Cap.

MUELLER®Improved and Centurion®Fire Hydrant

Notes

MUELLER®Improved and Centurion®Fire Hydrant

Notes

Water (U.S.)

1.800.423.1323

www.muellercompany.com

moreinfo@muellercompany.com

Form 9160 - Rev 09/17

The trademarks, logos and service marks displayed in this document herein are the property of Mueller Co., LLC, its afliates or other third parties.

Products marked with a section symbol ( § ) are subject to patents or patent applications. For details, visit www.mwppat.com. These products are

intended for use in potable water applications. Please contact your Mueller Sales or Customer Service Representative concerning any other application(s).

Reliable Connections

Water (Canada)

1.705.719.9965

www.muellercanada.com

[email protected]

International

1.423.490.9555

www.mueller-international.com

international@muellercompany.com

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