Mueller Centurion Series User manual

Customer Service Center
Decatur, Illinois
800.423.1323
www.muellercompany.com
[e-mail]
Reliable Connections
TM
Improved,
Centurion
Series,
Modern
Improved,
and 107®
Fire Hydrants
Inserting Extension
Sections
MUELLER®
insERtion instRUctions ManUaL
TABLE OF CONTENTS PAGE
Centurion Series Fire Hydrant –
Adding an Extension 2-3
Improved Fire Hydrant –
Inserting Extension Section
(All Models Prior to 1962) 4-5
Improved Fire Hydrant –
Inserting Extension Section
(Sealed Oil Reservoir 1962 Style) 6-7
Improved Fire Hydrant –
Inserting Extension Section
with Steel Stem Coupling
(Sealed Oil Reservoir 1962 Style) 8-9
Modern Improved Fire Hydrant –
Inserting Extension Section 10-11
107®Fire Hydrant –
Inserting Extension Section 12-13
Inserting Extension Sections – Notes 14-15
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.
!

MUELLER®Centurion®Series Fire Hydrant
Adding an Extension
4.
Attach Extension Barrel to Lower
Barrel with solid Flange halves
(without groove) and Bolts, being
sure O-ring is in place.
WARNING: Before removing any bolt(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.
2.
Unbolt Trafc Flange. Remove Upper
Barrel. Remove Upper Stem and
Stem Coupling by removing the lower
stainless steel Cotter Pin and stainless
steel Clevis Pin.
Place Extension Stem and Extension
Coupling on Lower Stem and retain
it with stainless steel Clevis Pin and
stainless steel Cotter Pin.
5.
Assemble Upper Stem and Stem Cou-
pling onto Extension Stem and retain it
with stainless steel Clevis Pin and stain-
less steel Cotter Pin.
NOTE: Make sure Stem Coupling is
installed with “This End Up” towards
the Upper Stem.
1.
Remove Hold-Down Nut, Anti-Friction
Washer and Operating Nut from
Bonnet. Lubricate outside of Brass
Sleeve and slide over threaded stem
end to prevent O-ring damage. Unbolt
Bonnet from Upper Barrel and remove.
Remove Brass Sleeve.
3.
!
2
EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.
Tools: Wrench, A-311 operating wrench, pliers.

MUELLER®Centurion®Series Fire Hydrant
Adding an Extension
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.
6.
Attach Upper Barrel with 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.
8.
9.
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).
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.
10.
7.
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.
!
3
EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.
Tools: Wrenches, A-311 operating wrench.

MUELLER®Improved Fire Hydrant
Inserting Extension Section (All Models Prior to 1962)
Remove four Bonnet Bolts and turn
operating nut in the opening direction
until free of stem. Remove Bonnet.
Place new Stem Coupling Sleeve part onto
Upper Stem. 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. 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.
Remove four bolts in stufng box.
Lubricate A-366 Brass Sleeve. Slide
Sleeve over threaded area of stem
to protect O-rings from damage by
threads. Lift stufng box off carefully.
Remove Brass Sleeve.
Unbolt Trafc Flange and remove Upper
Barrel.
Unscrew set screw in Sleeve. Screw
Stem Coupling down against shoulder.
Slide Sleeve up and unscrew Upper
Stem from Stem Coupling. Unscrew
Stem Coupling from Lower Stem. Screw
Extension Stem Coupling down on
Lower Stem against shoulder.
4
EQUIPMENT & TOOLS NEEDED – PPE: Safety shoes, safety vest, safety glasses, work gloves.
Tools: 1/4” hex-head wrench, A-51 lubricating oil, A-311 operating wrench, A-367 brass sleeve.
5
4.
Screw Extension Stem into Extension
Coupling until it contacts Lower Stem.
Align tongue and groove of stems
with hole in Extension Stem Coupling.
Screw Extension Stem Coupling
upward until tongue and groove of
stems rmly lock together. Tighten with
wrench, then, screw in Set Screw in
Extension Stem Coupling.
2.
1.
5.
3.

Attach Extension Barrel to Lower
Barrel with solid Flange Halves
(without groove) and bolts, being sure
Flange Gasket is in place.
Attach Upper Barrel to Extension Barrel
with Trafc Flange Halves (with groove)
and bolts, being sure Flange Gasket is
in place.
EQUIPMENT & TOOLS NEEDED – PPE: Safety shoes, safety vest, safety glasses, work gloves.
Tools: 1/4” hex-head wrench, A-51 lubricating oil, A-311 operating wrench, A-367 brass sleeve.
MUELLER®Improved Fire Hydrant
Inserting Extension Section (All Models Prior to 1962)
5
6. 7.
Check Stufng Box Gasket. Lubricate
A-366 Brass Sleeve. Slide Sleeve
over threaded area of stem to protect
O-rings from damage by threads.
Place Stufng Box in position and bolt
to barrel. Remove Brass Sleeve. Pour
Mueller Hydrant Lubricant into Oil
Reservoir until 3/4” from top.
Replace bonnet. Turn Operating Nut in
closing direction to engage stem. If
Bonnet has Filler Plug, make sure that
the Filler Plug Hole is aligned with the
offset portion of the Oil Reservoir. Bolt
in place.
8.
9.
Turn Operating Nut in the
closing direction to make sure
Main Valve is closed, then turn in the
opening direction approximately 1/4
turn to relieve tension on the operating
mechanism.
10.

MUELLER®Improved Fire Hydrant
Inserting Extension Section (Sealed Oil Reservoir 1962 Style)
1. 3.
Remove Weather Cap, Hold Down
Nut and Operating Nut from Bonnet.
Lubricate A-366 Brass Sleeve and slide
over threaded stem end to prevent
O-ring damage. Unbolt Bonnet from
Upper Barrel and remove. Remove
Brass Sleeve.
Screw Extension Stem into Extension
Coupling until it contacts Lower Stem.
Align tongue and groove of stems
with hole in Extension Stem Coupling.
Screw Extension Stem Coupling
upward until tongue and groove of
stems rmly lock together. Tighten with
wrench, then screw in set screw in
Extension Stem Coupling.
4.
Place new Stem Coupling Sleeve part
onto Upper Stem. 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. 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 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.
Attach Extension Barrel to Lower Barrel
with solid Flange Halves (without
groove) and bolts, being sure Flange
Gasket is in place.
2.
Unbolt Trafc Flange and remove
Upper Barrel. Unscrew set screw in
Sleeve.
Screw Stem Coupling down against
shoulder. Slide Sleeve up and unscrew
Upper Stem from Stem Coupling.
Unscrew Stem Coupling from Lower
Stem. Screw Extension Stem Coupling
down on Lower Stem against shoulder.
5.
Attach Upper Barrel to Extension Barrel
with Trafc Flange Halves (with groove)
and bolts, being sure Flange Gasket is
in place.
6
EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.
Tools: Wrench, A-316 nozzle wrench, brass hammer.
6.

MUELLER®Improved Fire Hydrant
Inserting Extension Section (Sealed Oil Reservoir 1962 Style)
EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.
Tools: Wrench, A-367 brass sleeve, A-359 seat wrench, A-311 operating wrench.
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 A-
24099 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 lled to the level of
the Oil Plug. Replace Oil Plug.
Turn Operating Nut in the
closing direction to make sure
Main Valve is closed, then turn in the
opening direction approximately 1/4
turn to relieve tension on the operating
mechanism.
7
9.
7. 8.

MUELLER®Improved Fire Hydrant
Inserting Extension Section with Steel Stem Coupling (Sealed Oil Reservoir 1962 Style)
8
1. 3.
Remove Weather Cap, Hold Down
Nut and Operating Nut from Bonnet.
Lubricate A-366 Brass Sleeve and slide
over threaded stem end to prevent
O-ring damage. Unbolt Bonnet from
Upper Barrel and remove. Remove
Brass Sleeve.
Place Extension Stem and Extension
Coupling on Lower Stem and retain
it with stainless steel Clevis Pin and
stainless steel Cotter Pin.
4.
Assemble Upper Stem and Stem
Coupling onto Extension Stem and
retain it with stainless steel Clevis Pin
and stainless steel Cotter Pin. Make
sure Stem Coupling is installed with
notches towards the Lower Stem,
words “THIS END UP” towards the
Upper Stem.
Attach Extension Barrel to Lower
Barrel with solid Flange Halves
(without groove) and bolts, being sure
Flange Gasket is in place.
2.
Unbolt Trafc Flange and remove Upper
Barrel. Remove Upper Stem and
Stem Coupling by removing the lower
stainless steel Cotter Pin and stainless
steel Clevis Pin.
5.
Attach Upper Barrel to Extension Barrel
with Trafc Flange Halves (with groove)
and bolts, being sure Flange Gasket is
in place.
EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.
Tools: Wrench, A-316 nozzle wrench, brass hammer.
6.

MUELLER®Improved Fire Hydrant
Inserting Extension Section with Steel Stem Coupling (Sealed Oil Reservoir 1962 Style)
9
8
EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.
Tools: Wrench, A-366 brass sleeve, A-359 seat wrench, A-311 operating wrench.
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 full 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 A-366
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 lled to the level of the Oil Plug.
Replace Oil Plug.
Turn Operating Nut in the
closing direction to make sure
Main Valve is closed, then turn in the
opening direction approximately 1/4
turn to relieve tension on the operating
mechanism.
9.
7. 8.

MUELLER®Modern Improved Fire Hydrant
Inserting Extension Section
10
1. 3.
Remove Weather Cap, Hold Down Nut,
Lock Washer and Operating Nut. Put on
Brass Sleeve and lubricate to protect
O-rings in operating housing.
Remove Upper Stem and Stem
Coupling by removing the lower
stainless steel Cotter Pin and stainless
steel Clevis Pin.
4.
Place Extension Stem and Extension
Coupling on Lower Stem and retain
it with stainless steel Clevis Pin and
stainless steel Cotter Pin.
Assemble Upper Stem and Stem
Coupling onto Extension Stem and
retain it with stainless steel Clevis Pin
and stainless steel Cotter Pin. Make
sure Stem Coupling is installed with
notches towards the Lower Stem.
NOTE: “THIS END UP” stamped on
coupling.
2.
Unbolt Trafc Flange Clips and lift
hydrant over stem.
5.
Attach Extension Barrel to Lower Barrel
with solid ange halves and bolts,
being sure Flange Gasket is in place
(tighten bolts to 1,000 in-lbs).
EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.
Tools: Wrench, A-316 nozzle wrench, brass hammer.
6.

MUELLER®Modern Improved Fire Hydrant
Inserting Extension Section
11
7. 9.
With lubricated Brass Sleeve on threads
of Upper Stem and Upper Barrel Seal
in position, lift Upper Barrel over Upper
Stem and onto extension section
Attach Trafc Flange Clips and Trafc
Flange Clip Bolts loosely, face nozzles
in desired position and tighten Trafc
Flange Clip Bolts uniformly to 1,000
in-lbs.
Tighten Hold Down Nut to 100 ft-lbs
and bend Lock Washer Ears over Hold
Down Nut ats in two places and over
Operating Housing in two places.
10.
Remove Oil Filler Plug and add Mueller®
Hydrant Lubricant until level with Filler
Plug hole. Replace Oil Filler Plug and
replace Weather Cap.
8.
With extension section and Hydrant
securely bolted in place, remove Brass
Sleeve, replace Operating Nut, Lock
Washer, and Hold Down Nut.
EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.
Tools: Wrench, A-316 nozzle wrench, brass hammer.
Open Hydrant fully and loosen
one Hose Nozzle Cap, to bleed
air. When barrel is lled with water,
tighten Nozzle Cap and check gaskets.
Turn Operating Nut to fully closed
position, loosen one nozzle cap to
allow barrel to drain.
11. Turn Operating Nut in the
closing direction to make sure
Main Valve is closed, then turn in the
opening direction approximately 1/4
turn to relieve tension on the operating
mechanism.
12.

MUELLER®107®Fire Hydrant
Inserting Extension Section
12
1. 3.
Remove Bonnet Bolts and Nuts. Rotate
Operating Nut in opening direction to
fully opened position. This lifts Bonnet
off the Upper Barrel. Rotate bonnet
assembly counter-clockwise to detach
Bonnet from Upper Stem threads. Lift
off Bonnet, remove Bonnet Gasket.
Place Extension Stem and Extension
Coupling on lower stem and retain
it with stainless steel Clevis Pin and
stainless steel Cotter Pin.
4.
Assemble Upper Stem and Stem
Coupling onto Extension Stem and
retain it with stainless steel Clevis Pin
and stainless steel Cotter Pin. Make
sure Stem Coupling is installed with
notches towards the Lower Stem,
words “THIS END UP” towards the
Upper Stem.
Attach Extension Barrel to Lower
Barrel with solid ange halves (without
groove) and bolts, being sure ange
gasket is in place.
2.
Unbolt Trafc Flange and remove Upper
Barrel. Remove Upper Stem and
Stem Coupling by removing the lower
stainless steel Cotter Pin and stainless
steel Clevis Pin.
5.
Attach Upper Barrel to Extension Barrel
with Trafc Flange halves (with groove)
and bolts, being sure Trafc Flange
Gasket is in place.
EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.
Tools: Wrench, A-316 nozzle wrench, brass hammer.
6.

MUELLER®107®Fire Hydrant
Inserting Extension Section
13
7.
Check Bonnet Gasket on top of Upper
Barrel, replace if damaged. Check
to see that Upper Stem threads are
lubricated and Upper Stem Seal
(O-ring) is not damaged. Check to be
sure that the Operating Nut is in the fully
open position, which is with the Stem
Nut fully extended. Reassemble Bonnet
Assembly to Upper Stem by rotating
clockwise as far as possible, then back
up only enough to align bolt holes,
if needed. Rotate Operating Nut in
closing direction, which lowers Bonnet
Assembly onto Upper Barrel and allows
bolts to be replaced. With all bolts in
Bonnet, rotate Operating Nut using the
same torque as normally used to close
the Hydrant. Tighten all Bonnet Bolts
and Nuts.
EQUIPMENT & TOOLS NEEDED – PPE: Hard hat, safety shoes, safety vest, safety glasses, work gloves.
Tools: Wrench, A-316 nozzle wrench, brass hammer.
Turn Operating Nut in the
closing direction to make sure
Main Valve is closed, then turn in the
opening direction approximately 1/4
turn to relieve tension on the operating
mechanism.
8.

Inserting Extension Sections
Notes
14

Inserting Extension Section
Notes
15

Water (U.S.)
1.800.423.1323
www.muellercompany.com
[e-mail]
Form 10923 - 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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