Mueller Centurion Series Instruction Manual

Customer Service Center
Decatur, Illinois
800.423.1323
www.muellercompany.com
[e-mail]
Reliable Connections
TM
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)
4.
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.
5.
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.
1.
MUELLER Improved Hydrant with
Upper Barrel knocked over by truck.
Note broken pieces of Trafc Flange
lying on ground.
3.
2
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.
!
3
2.

MUELLER®Improved Fire Hydrant
Replacing Trac Flange and Brass Stem Coupling (All Models Prior to 1962)
6.
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.
7.
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.
3
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.
!
4
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.
5
4.
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.
2.
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
6.
5. 7.
8.

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).
4.
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.
2.
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.
5.
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.
6
6.
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
9.
7. 8.

MUELLER®Centurion®Fire Hydrant
Replacing Trac Flange and Stem Coupling
4.
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.
2.
Remove stainless steel Cotter Pin from
stainless steel Clevis Pin in Lower Stem
(throw away the old Clevis Pin, Cotter
Pin, and old coupling).
3.
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.
1.
8
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.
5.
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.
7.
8.
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).
9.
6.
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.
!
9
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.
8
§

MUELLER®Improved and Centurion®Fire Hydrant
Notes
10

MUELLER®Improved and Centurion®Fire Hydrant
Notes
11

Water (U.S.)
1.800.423.1323
www.muellercompany.com
[e-mail]
Form 9160 - Rev 09/17
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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).
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