Mueller Super Centurion 350 Instruction Manual

Customer Service Center
Decatur, Illinois
800.423.1323
www.muellercompany.com
[e-mail]
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.
Reliable Connections
TM
Super
Centurion®
350 Fire
Hydrant
MUELLER®
opERating instRUctions ManUaL
TABLE OF CONTENTS PAGE
Inspection and Maintenance 2
Filling Oil Reservoir 3
Facing the Hydrant 4
 RestoringServiceafterTrafcKnockover 5-6
 MainValveReplacement:BonnetFlange 7-8
 MainValveReplacement:LowerBarrelFlange 9-10
 ReplacingDamagedNozzles 11
 ChangingtheShoe 12
 AddinganExtension 13-14
 Parts 15
 RepaintingtheHydrant 16
!

MUELLER®Super Centurion 350 Fire Hydrant
Inspection and Maintenance
23
Remove all Nozzle Caps. Clean and
lubricate threads.
ExamineinsideofBarreltomake
certain Drain Valves have completely
drained water from Barrel. If water
fails to drain from Barrel, it may
be caused by one or more of the
following conditions:
1. Water Table in ground is higher
than drains.
2. When Hydrant was installed,
coarse gravel was not placed around
Drains, in locations where ground
hasamakeupsuchthatitwillnot
absorb water.
3. Drains are stopped by some
foreign material.
4. Failure to leave Cap off of Hydrant
to allow air to enter so Barrel will
drain.
The foregoing procedure introduces
full line pressure to Drain Valves.
It provides the best method for
cleaning Drain Valves using water
pressure.
IMPORTANT - Initial installation
of Hydrant MUST BE MADE
PROPERLY so Trafc Flange
will function properly. Hydrant
should be blocked at ground line
and around Shoe using concrete
or similar substance to prevent
ground from giving way when
Hydrant is struck.
This manual applies to all Mueller
SuperCenturion350FireHydrants.
Inspection
To ensure their readiness for
immediate use, it is recommended
that Fire Hydrants be inspected and
testedatsix-monthintervals.
Inspect visually for damaged or
missing parts.
Loosen one Nozzle Cap slightly and
tighten the others. Open Hydrant
fully. Tighten loose Nozzle Cap
whenwaterstartstoow.Remove
OilFillerPlugtocheckoillevel.Ifoil
levelislow,llasshownonpage
3.Checkallangeconnectionsfor
leaks.TurnOperatingNuttofully
CLOSED position.
IfwateroroiloverowedfromOil
Filler Hole, remove Bonnet and
replaceO-ringsinboththeBonnet
and the Hold Down Nut. Inspect
and clean Stem, and replace it if
corrodedorpitted.Checkoillevel.
ReplaceBonnetandtestforleaks.
UseA-367BrassSleevewhen
removing or replacing Bonnet or
Hydrant Barrel to protect stem
O-rings.
Remove one Nozzle Cap, stand on
the side of Hydrant opposite the cap
removed, open Hydrant fully, and
ushBarrelandHydrantLateral.
Turn Operating Nut to fully CLOSED
position.
For additional information on
Hydrantanchorage,blocking,and
drainage, see AWWA Standard
C600andManualM17.
Assembly
Proper assembly of Super Centurion
350HydrantThrustBearingontop
of Thrust Collar. (A.)
3-pieceThrustBearingassembled
on Operating Nut Thrust Collar
(shown partially withdrawn from
bonnet to show bearing detail).
Roller Bearing/Race must be located
between the upper and lower
Bearing Washers (B.).
GENERAL
A.
B.

MUELLER®Super Centurion 350 Fire Hydrant
2
Filling Oil Reservoir
3
RemoveOilFillerPlugandcheckoil
level. Oil should be level with Oil Filler
Plug Hole.
If oil is low, use a small funnel to add
MUELLER Hydrant Lubricant.
WhenoilislevelwithOilllerPlug
Hole, replace Oil Filler Plug.
1. 2. 3.
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:Safetyshoes,safetyvest,safetyglasses,workgloves.
Tools: 1/4”hex-headwrench,A-51lubricatingoil.

MUELLER®Super Centurion 350 Fire Hydrant
Facing the Hydrant
1. 3.
LoosenNutsonTrafcFlangeBolts. Rotate Upper Barrel section as desired.
4. 5.
Tighten Operating Nut, turning in
closing direction.
TightenTrafcFlangeBoltsto60ft-lbs. 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.
2.
6.
Turn Operating Nut slightly in the
opening direction to relieve compression
between Barrel sections.
4
EQUIPMENT & TOOLS NEEDED –PPE:Hardhat,safetyshoes,safetyvest,safetyglasses,workgloves.
Tools: A-311operatingwrenchandproperbolt/nutwrenches.
5

MUELLER®Super Centurion 350 Fire Hydrant
Restoring Service after Trac Knockover
4.
Remove stainless steel Cotter Pin from stainless steel Clevis Pin. Remove Clevis
PinandbrokenTrafcCouplingfromUpperStem.Unboltandremovebroken
TrafcFlangefromUpperBarrel.RemoveHold-DownNut,ThrustBearing,and
OperatingNutfromBonnet.LubricateA-367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Trafc
Coupling onto Lower Stem and retain it
with the new stainless steel Clevis Pin
and new stainless steel Cotter Pin.
2.
Remove stainless steel Cotter Pin from
stainless steel Clevis Pin in Lower Stem
(throw away the old Clevis Pin, Cotter
Pin,andoldTrafcCoupling).
3.
AssemblenewTrafcCouplingto
Upper Stem with new stainless steel
Clevis Pin and new stainless steel
Cotter Pin.
NOTE: “This End Up” Molded on
Coupling.
1.
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.
!
5
EQUIPMENT & TOOLS NEEDED –PPE:Hardhat,safetyshoes,safetyvest,safetyglasses,workgloves.
Tools:Wrench,A-311operatingwrench,A-367BrassSleeve,TrafcFlangeRepairKit.

MUELLER®Super Centurion 350 Fire Hydrant
Restoring Service after Trac Knockover
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 3).
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,
ThrustBearing,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.
!
6
EQUIPMENT & TOOLS NEEDED –PPE:Hardhat,safetyshoes,safetyvest,safetyglasses,workgloves.
Tools:Wrenches,A-311operatingwrench,A-367BrassSleeve,TrafcFlangeRepairKit.
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.
7

MUELLER®Super Centurion 350 Fire Hydrant
Main Valve Replacement: Bonnet Flange
1.
4.
RemoveHold-DownNutOperating
Nut and Thrust Bearing from Bonnet.
LubricateA-367BrassSleeveandslide
overthreadedstemtopreventO-ring
damage. Unbolt and remove Bonnet.
Remove Brass Sleeve.
StraightenstainlesssteelLockWasher,
unscrew Cap Nut and remove Washer,
Stem Seal, Lower Valve Plate, Main
Valve and Seat Ring. Clean, inspect and
replace any damaged parts (Main Valve
can be reversed to provide new seal).
Replace Drain Valve Facings. Inspect
and lubricate Top and Bottom Seat Ring
O-rings(replaceifnecessary).Lubricate
all threaded surfaces and reassemble.
WithCapNuttightenedto100ft-lbs,
bendedgesofstainlesssteelLock
WasheroveroneatontheLowerValve
PlateandoneatontheCapNut.
2. 3.
SlideslottedendoftheA-359Seat
Wrench over top of Stem and engage
the slot with Pin in Upper Stem. Thread
Operating Nut onto stem and tighten
against wrench to hold it securely.
Pull up on the Seat Wrench to be sure
the main valve is completely closed.
Lowersupportarmontotopangeof
the Upper Barrel and tighten Thumb
Screw to hold the Main Valve in the
closed position. Remove Main Valve
Assembly by turning Seat Wrench
counter-clockwise.
Lift out Wrench, Lower Stem, Main
Valve Assembly and Seat Ring from
Hydrant Barrel as a unit.
7
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.
!
5.
Lower Main Valve into the Barrel.
Lower Support Arm and tighten Thumb
Screw. Carefully thread main valve
assemblyclockwiseintothebaseofthe
Hydrant. Hand tighten.
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,MainValveRepairKit,A-51lubricatingoil.

9
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®Super Centurion 350 Fire Hydrant
Main Valve Replacement: Bonnet Flange
8.
Remove Oil Filler Plug on 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 3).
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A-367
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,ThrustBearing,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.
8
9.
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.
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,MainValveRepairKit,A-51lubricatingoil.
6.
TightenMainValveto100-150ft-lbs.RemoveWrenchfromStembyremoving
Operating Nut.

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.
!
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,MainValveRepairKit,A-51lubricatingoil.
MUELLER®Super Centurion 350 Fire Hydrant
Main Valve Replacement: Lower Barrel Flange
4.
Lower Main Valve into the Barrel.
Lower Support Arm and tighten Thumb
Screw. Carefully thread main valve
assemblyclockwiseintothebaseofthe
Hydrant. Hand tighten.
SlideslottedendofA-359SeatWrenchoverLowerStem.AlignholesinWrenchand
Stem and attach Wrench to Stem with Clevis Pin. Lower Support Arm onto the Flange
of Lower Barrel and tighten Thumb Screw (to hold Main Valve in closed position).
RemoveMainValveAssemblybyturningWrenchcounter-clockwiseandliftout
Wrench, Lower Stem, Main Valve Assembly and Seat Ring from Hydrant Barrel as a
unit.
3.
StraightenstainlesssteelLockWasher,
unscrew Cap Nut and remove Washer,
Stem Seal, Lower Valve Plate, Main
Valve and Seat Ring. Clean, inspect
and replace any damaged parts.
Replace Drain Valve Facings. Inspect
and lubricate Top and Bottom Seat Ring
O-rings(replaceifnecessary).Lubricate
all threaded surfaces and reassemble.
WithCapNuttightenedto100ft-lbs,
bendedgesonstainlesssteelLock
WasheroveroneatontheLower
ValvePlateandoneatontheCapNut.
1.
RemoveHold-DownNut,Thrust
Bearing and Operating Nut from
Bonnet. Lubricate Brass Sleeve
and slide over threaded stem end to
preventO-ringdamage.
Unbolt and remove Bonnet. Remove
TrafcFlangeBoltsandTrafcFlange.
Remove Upper Barrel.
Remove Upper Stem and Stem
Coupling from Lower Stem.
2.
9

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®Super Centurion 350 Fire Hydrant
Main Valve Replacement: Lower Bonnet Flange
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.
6.
Reassemble Upper Stem to Lower
Stem. Place Upper Barrel in place and
reassembleTrafcFlange.*Tighten
Boltsto60ft-lbs.
5.
TightenMainValveto100-150ft-
lbs. Remove Wrench from Stem by
removing Clevis Pin.
8.
Remove Oil Filler Plug on 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 3).
7.
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,
ThrustBearing,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.
10.
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.
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9.
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.
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