Mueller Super Centurion 350 User manual

Copyright 2013-MUELLER CO. Form 12860-Rev. 07/13-3M-1 Printed in U.S.A.
MUELLER®
SUPER CENTURION®
350 FIRE HYDRANT
Customer Service Center
Decatur, I inois
800-423-1323
www.mue ercompany.com
moreinfo@mue ercompany.com
Before removing any bo ts(s) ho ding the hydrant together, shut off gate va ve to iso ate hydrant from main water source. Loosen (do not remove) one nozz e cap
two turns and check for water under pressure inside hydrant - b eed off any pressure, then remove nozz e cap comp ete y. Open hydrant main va ve comp ete y.
A continuous f ow of water, no matter how s ight, indicates hydrant is not proper y iso ated from the main water supp y, and that prob em must be corrected before
any hydrant disassemb y can proceed. Disassemb y of hydrant with pressurized water acting against the main va ve cou d resu t in unexpected ejection of hydrant
parts, debris or high-pressure water stream, which cou d cause serious bodi y injury.
! WARNING
Operating
Instructions or

1
MUELLER®SUPER CENTURION®3 0 FIRE HYDRANT
Inspection and Maintenance
This manual applies to all Mueller Super Centurion 350
Fire Hydrants.
Inspecti n
To ensure their readiness for immediate use, it is
recommended that Fire Hydrants be inspected and
tested at six-month intervals.
Inspect visually or damaged or missing parts.
Loosen one Nozzle Cap slightly and tighten the others.
Open Hydrant ully. Tighten loose Nozzle Cap when
water starts to low. Remove Oil Filler Plug to check oil
level. I oil level is low, ill as shown on page 3. Check
all lange connections or leaks. Turn Operating Nut to
ully CLOSED position.
I water or oil over lowed rom 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 i corroded or pitted. Check oil level. Replace
Bonnet and test or 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 o Hydrant
opposite the cap removed, open Hydrant ully, and
lush Barrel and Hydrant Lateral. Turn Operating Nut
to ully CLOSED position.
Remove all Nozzle Caps. Clean and lubricate threads.
Examine inside o Barrel to make certain Drain Valves
have completely drained water rom Barrel. I water
ails to drain rom Barrel, it may be caused by one or
more o the ollowing 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 oreign material.
4. Failure to leave Cap o o Hydrant to allow air to
enter so Barrel will drain.
The oregoing procedure introduces ull line pressure
to Drain Valves. It provides the best method or
cleaning Drain Valves using water pressure.
IMPORTANT - Initial installation o Hydrant MUST BE
MADE PROPERLY so Sa ety Flange will unction
properly. Hydrant should be blocked at ground line
and around Shoe using concrete or similar substance
to prevent ground rom giving way when Hydrant is
struck.
For additional in ormation on Hydrant anchorage,
blocking, and drainage, see AWWA Standard C600
and Manual M17.
Assembly
Proper assembly of Super Centurion 3 0 Hydrant
Thrust Bearing on top of Thrust Collar
3-piece Thrust Bearing assembled on Operating Nut
Thrust Collar (shown partially withdrawn rom bonnet
to show bearing detail). Roller Bearing/Race must be
located between the upper and lower Bearing
Washers, as shown.

2
MUELLER®SUPER CENTURION®3 0 FIRE HYDRANT
Parts
A-1 Operating Nut
A-85 Weather Seal
A-3 Hold Down Nut O-ring - Inside
A-84 Hold Down Nut
A-5 Hold Down Nut O-ring - Outside
A-6 Thrust Bearing
A-7 Oil Plug
A-8 Bonnet
A-9 Bonnet Bold and Nut
A-10 Bonnet O-ring
A-11 Upper Stem
A-12 Stem O-ring
A-13 Nozzle Lock
A-14 Pumper Nozzle
A-15 Pumper Nozzle Gasket
A-16 Pumper Nozzle O-ring
A-17 Pumper Nozzle Cap
A-18 Hose Nozzle
A-19 Hose Nozzle Gasket
A-20 Hose Nozzle O-ring
A-21 Hose Nozzle Cap
A-22 Chain
A-23 Chain Connector Hook
A-24 Upper Barrel (less nozzles)
A-25 Sa ety Coupling
A-26 Sa ety Flange Bolt and Nut
A-27 Sa ety Flange O-ring
A-28 Sa ety Flange
A-29 Cotter Pin
A-30 Clevis Pin
A-31 Lower Stem
A-32 Lower Barrel
A-33 Stem Pin
A-34 Drain Valve Facing
A-35 Drain Valve Facing Screw
A-36 Upper Valve Plate
A-37 Shoe bolt and nut
A-38 Drain Ring Housing O-ring
A-39 Seat Ring Top O-ring
A-40 Drain Ring Housing
A-42 Drain Ring
A-43 Seat Ring
A-44 Seat Ring Bottom O-ring
A-45 Metal Rein orced Main Valve
A-46 Lower Valve Plate
A-47 Cap Nut Seal
A-48 Lock Washer
A-49 Lower Valve Plate Nut
A-50 Shoe
A-51 Hydrant Lubrication Oil

1. Remove Oil Filler Plug and check oil
level. Oil should be level with Oil Filler
Plug Hole.
2. I oil is low, use a small unnel to add
MUELLER Hydrant Lubricant
3. When oil is level with Oil Filler Plug
Hole, replace Oil Filler Plug.
3
MUELLER®SUPER CENTURION®3 0 FIRE HYDRANT
Filling Oil Reservoir
CAUTION: Always fill the il reserv ir with the b nnet installed, the hydrant in its n rmal
upright p siti n, and the main valve fully cl sed. If the hydrant is filled with lubricant under
any ther circumstances, excess lubricate can verfill the B nnet and create a pressure l ck. This
c uld result in damage t the seals r B nnet r prevent pr per hydrant perati n.

4
MUELLER®SUPER CENTURION®3 0 FIRE HYDRANT
Facing o Hose Nozzles
1. Loosen Nuts on Sa ety Flange Bolts. 3. Rotate Upper Barrel section as
desired.
5. Tighten Sa ety Flange Bolts.
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.
2. Turn Operating Nut slightly in the
opening direction to relieve compression
between Barrel sections.
4. Tighten Operating Nut, turning in
closing direction.

5
MUELLER®SUPER CENTURION®3 0 FIRE HYDRANT
Replacing Sa ety Stem Flange and Sa ety Stem Coupling
1. Mueller Hydrant with Upper Barrel
knocked over by truck. Note broken pieces
o Sa ety Flange lying on ground.
3. Remove stainless steel Cotter Pin rom
stainless steel Clevis Pin in Lower Stem (throw
away the old Clevis Pin, Cotter Pin, and any
remnants o old coupling).
7. Check Bonnet O-ring** or proper position
and condition. Attach Brass Sleeve to Upper
Stem and lubricate outside to protect O-ring
Seals rom thread damage. Place Bonnet
onto Upper Barrel and assemble Bonnet Bolts
only hand-tight. Remove Brass Sleeve.
Reassemble Operating Nut, Thrust Bearing
(re er to pg 1 or correct assembly), and Hold
Down Nut*. Be sure O-ring Seals are in good
condition at thread shoulder on outside o
Hold Down Nut and on in side where
contact is made with Operating Nut. Remove
Oil Filler Plug in side o Bonnet. Pour
MUELLER Hydrant Lubricant into Oil Reservoir
until it is level with the Oil Filler Hole. Replace
Oil Filler Plug.
2. Remove stainless steel Cotter Pin rom
stainless steel Clevis Pin. Remove Clevis Pin
and Sa ety Coupling rom Upper Stem.
Unbolt and remove broken Sa ety Flange
rom Upper Barrel. Remove Hold Down
Nut, Thrust Bearing, and Operating Nut
rom Bonnet. Lubricate Brass Sleeve and
slide over threaded Stem end to prevent O-
ring damage. Unbolt Bonnet rom Upper
Barrel. Slide Upper Stem out o Bonnet and
remove Brass Sleeve.
5. Assemble Upper Stem and new Sa ety
Stem Coupling onto Lower Stem and retain
it with the new stainless steel Clevis Pin and
new stainless steel Cotter Pin urnished with
Sa ety Stem Coupling.
8. Tighten Bonnet Bolts. Unscrew one Hose
Nozzle Cap slightly to bleed air. Open
Hydrant ully. Tighten the Hose Nozzle Cap
when water starts lowing and check all
lange connections or leaks. Turn Operating
Nut to ully closed position and remove
Hose Nozzle Cap to allow Barrel to drain.
Replace Hose Nozzle Cap.
9. 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.
4. Assemble new Sa ety Stem Coupling to
Upper Stem with new stainless steel Clevis
Pin and new stainless steel Cotter Pin.
NOTE: “THIS END UP” MOLDED ON
COUPLING.
6. Install O-ring** in groove in Ground Line
Flange o Upper Barrel and place Upper
Barrel care ully in position on Lower Barrel.
Be sure that Upper Barrel is concentric with
Lower Barrel. Bolt the two halves o Sa ety
Flange into place (with bevel on outer edge
downward) and with Sa ety Flange snugly
itting around Lower Barrel.
CAUTION: Always fill the il
reserv ir with the b nnet installed,
the hydrant in its n rmal upright
p siti n, and the main valve fully
cl sed. If the hydrant is filled with
lubricant under any ther circum -
stances, excess lubricant can verfill
the b nnet and create a pressure
l ck. This c uld result in damage t
the seals r b nnet, r prevent
pr per hydrant perati n.
*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
FIRMLY TWO TIMES TO ASSURE THE NUT IS
PROPERLY TIGHTENED.
**TO DETERMINE CORRECT O-RINGS FOR
BONNET AND GROUND LINE FLANGES,
WHICH ARE SIMILAR IN APPEARANCE:
SMALLER DIAMETER O-RING IS USED AT
BONNET FLANGE; LARGER AT GROUND
LINE FLANGE.

6
MUELLER®SUPER CENTURION®3 0 FIRE HYDRANT
Removing Main Valve From Bonnet Flange
1. Remove Hold Down Nut, Operating Nut, and
Thrust Bearing rom Bonnet. Lubricate Brass
Sleeve and slide over threaded stem to prevent
O-ring damage. Unbolt and remove Bonnet.
Remove Brass Sleeve.
2. Slide slotted end o Wrench over top o Stem
and engage the slot with Pin in Upper Stem.
Thread Operating Nut onto stem and tighten
against wrench to hold it securely. Lower
support arm onto top lange o the Upper Barrel
and tighten Thumb Screw to hold the Main
Valve in the closed position. Shut o water at the
Gate Valve. Remove Main Valve Assembly by
turning Seat Wrench counter-clockwise.
3. Li t out Wrench, Lower Stem, Main Valve Assem -
bly and Seat Ring rom Hydrant Barrel as a unit.
4. 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 Ring Facings. Inspect
and lubricate Top and Bottom Seat Ring O-rings
(replace i necessary). Lubricate all threaded
sur aces and reassemble.
5. With Cap Nut tightened to 100 t-lbs on 5
1/4” Hydrant or 75 t-lbs on 4 1/2” Hydrant,
bend edges o stainless steel Lock Washer over
one lat on the Lower Valve Plate and one lat on
the Cap Nut.
6. Lower Main Valve, turn Seat Wrench
clockwise, and care ully thread Main Valve and
Seat Ring into the base o the Hydrant hand-
tight. Raise the Main Valve leaving about 1/2” o
play between the Main Valve and Seat. Lower
Support Arm and tighten Thumb Screw.
7. Turn Seat Wrench clockwise to tighten Main
Valve to 200 t-lbs. Turn on water at the Gate
Valve and remove Seat Wrench by removing
operating nut.
8. Check Bonnet O-ring or proper position and
condition. Attach Brass Sleeve to Upper Stem and
lubricate outside to protect O-ring Seals rom
thread damage. Place Bonnet onto Upper Barrel
and assemble Bonnet Bolts only hand-tight.
Remove Brass Sleeve. Reassemble Operating Nut,
Thrust Bearing (re er to pg 1 or correct assembly),
and Hold Down Nut*. Be sure O-ring Seals are in
good condition at thread shoulder on outside o
Hold Down Nut and on inside where contact is
made with Operating Nut. Remove Oil Filler Plug
in side o Bonnet. Pour MUELLER Hydrant
Lubricant into Oil Reservoir until it is level with the
Oil Filler Hole. Replace Oil Filler Plug.
9. Tighten Bonnet Bolts. Unscrew one Hose
Nozzle Cap slightly to bleed air. Open hydrant
ully. Tighten the Hose Nozzle Cap when water
starts lowing and check all lange connections
or leaks. Turn Operating Nut to ully closed
position and remove Hose Nozzle Cap to allow
Barrel to drain. Replace Nozzle Cap.
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.
Bef re rem ving any b lt(s) h lding the hydrant t gether, shut ff gate valve t is late hydrant fr m main water s urce.
Lsen (d n t rem ve) ne n zzle cap tw turns and check f r water under pressure inside hydrant – bleed ff any pressure,
then rem ve n zzle cap c mpletely. Open hydrant main valve c mpletely. A c ntinu us fl w f water, n matter h w slight,
indicates hydrant is n t pr perly is lated fr m the main water supply, and that pr blem must be c rrected bef re any
hydrant disassembly can pr ceed. Disassembly f hydrant with pressurized water acting against the main valve c uld result
in unexpected ejecti n f hydrant parts, debris r high-pressure water stream, which c uld cause seri us b dily injury.
! WARNING
CAUTION: Always fill the il reser -
v ir with the b nnet installed, the
hydrant in its n rmal upright
p siti n, and the main valve fully
cl sed. If the hydrant is filled with
lubricant under any ther circum -
stances, excess lubricant can verfill
the b nnet and create a pressure
l ck. This c uld result in damage t
the seals r b nnet, r prevent
pr per hydrant perati n.
*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
FIRMLY TWO TIMES TO ASSURE THE NUT IS
PROPERLY TIGHTENED.

7
MUELLER®SUPER CENTURION®3 0 FIRE HYDRANT
Remove Main Valve rom Lower Barrel Flange
CAUTION: Always fill the il reserv ir
with the b nnet installed, the hydrant
in its n rmal upright p siti n, and the
main valve fully cl sed. If the hydrant
is filled with lubricant under any ther
circum stances, excess lubricant can
ver fill the b nnet and create a pres -
sure l ck. This c uld result in damage
t the seals r b nnet, r prevent
pr per hydrant perati n.
1. Remove Hold Down Nut, Thrust Bearing, and
Operating Nut rom Bonnet. Lubricate Brass
Sleeve and slide over threaded stem end to
prevent O-ring damage. Unbolt and remove
Bonnet. Remove Sa ety Flange Bolts and Sa ety
Flange. Remove Upper Barrel. Remove Upper
Stem and Stem Coupling rom Lower Stem. Slide
slotted end o Wrench over Lower Stem. Align
holes in Wrench and Stem and attach Wrench to
Stem with Clevis Pin. Lower Support Arm onto the
Flange o Lower Barrel and tighten Thumb Screw
(to hold Main Valve in closed position). Shut o
water at Gate Valve.
5. Tighten Main Valve to 200 t-lbs. Turn on
water at the Gate Valve and remove Wrench
rom Stem by removing Clevis Pin.
8. Tighten Bonnet Bolts. Unscrew one Hose
Nozzle Cap slightly to bleed air. Open Hydrant
ully. Tighten the Hose Nozzle Cap when water
starts lowing and check all lange connections
or leaks. Turn Operating Nut to ully closed
position and remove Hose Nozzle Cap to allow
Barrel to drain. Replace Nozzle Cap.
9. 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. Remove Main Valve Assembly by turning
Wrench counter-clockwise and li t out Wrench,
Lower Stem, Main Valve Assembly and Seat
Ring rom Hydrant Barrel as a unit.
6. Reassemble Upper Stem to Lower Stem.
Place Upper Barrel in place and reassemble
Sa ety Flange.**
4. Lower Main Valve Assembly and care ully
thread Seat Ring into the base o the Hydrant
hand-tight. Raise the Main Valve leaving about
1/2” o play between the Main Valve and Seat.
Lower Support Arm onto Flange o Lower
Barrel and tighten Thumb Screw.
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. (Main Valve can be reversed to provide
new seal.) Replace Drain Valve Facings. Inspect
and lubricate Top and Bottom Seat Ring O-
rings (replace i necessary). Lubricate all
threaded sur aces and reassemble. With Cap
Nut tightened to 100 t-lbs on 5 1/4” Hydrant,
or 75 t-lbs on 4 1/2” Hydrant, bend edges on
stainless steel Lock Washer over one lat on the
Lower Valve Plate and one lat on the Cap Nut.
7. Check Bonnet O-ring** or proper position and
condition. Attach the Brass Sleeve to Upper Stem
and lubricate outside to protect O-ring Seals rom
thread damage. Place Bonnet onto Upper Barrel
and assemble Bonnet Bolts only hand-tight.
Remove Brass Sleeve. Reassemble Operating Nut,
Thrust Bearing (re er to pg 1 or correct assembly),
and Hold Down Nut*. Be sure O-ring Seals are in
good condition at thread shoulder on outside o
Hold Down Nut and on inside where contact is
made with Operating Nut. Remove Oil Filler Plug
in side o Bonnet. Pour MUELLER Hydrant
Lubricant into Oil Reservoir until it is level with Oil
Filler Plug Hole. Replace Oil Filler Plug.
Bef re rem ving any b lt(s) h lding the hydrant t gether, shut ff gate valve t is late hydrant fr m main water s urce.
L sen (d n t rem ve) ne n zzle cap tw turns and check f r water under pressure inside hydrant – bleed ff any pressure,
then rem ve n zzle cap c mpletely. Open hydrant main valve c mpletely. A c ntinu us fl w f water, n matter h w slight,
indicates hydrant is n t pr perly is lated fr m the main water supply, and that pr blem must be c rrected bef re any
hydrant disassembly can pr ceed. Disassembly f hydrant with pressurized water acting against the main valve c uld result
in unexpected ejecti n f hydrant parts, debris r high-pressure water stream, which c uld cause seri us b dily injury.
! WARNING
*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
FIRMLY TWO TIMES TO ASSURE THE NUT IS
PROPERLY TIGHTENED.
**TO DETERMINE CORRECT O-RINGS FOR
BONNET AND GROUND LINE FLANGES,
WHICH ARE SIMILAR IN APPEARANCE: SMALLER
DIAMETER O-RING IS USED AT BONNET
FLANGE; LARGER AT GROUND LINE FLANGE.

8
MUELLER®SUPER CENTURION®3 0 FIRE HYDRANT
To Replace Nozzles
1. Remove Nozzle Cap. 4. Remove Nozzle. The Nozzle Wrench
may be struck with a heavy brass
hammer or additional leverage may be
obtained by placing a length o 2”
schedule 40 steel pipe over the handle
o the Nozzle Wrench.
6. Remove Nozzle Cap and A-316
Nozzle Wrench. Place the Nozzle Lock
(Part 143137), lengthwise in the slot
ormed by either o the Nozzle Drive
Lugs and the Barrel Bore. Drive the
Nozzle Lock in place by striking the
Nozzle Lock Installation Tool (Part
143132) several times with a heavy
brass hammer.
NOTE: Wear sa ety glasses when
using a striking tool. The Nozzle Lock
does not have to be completely seated
into the slot, but it should be well
engaged along the entire length o the
Nozzle Drive Lug and Barrel Bore.
2. Remove stainless steel Nozzle Lock
by driving it out with a pointed tool
and hammer.
5. Thread new Nozzle into Upper
Barrel, attach A-316 Nozzle Wrench as
described in Step 3, and tighten Nozzle
to approximately 600 t-lbs torque (100
lbs. pull on a 6’ lever).
7. Replace and tighten Nozzle Cap.
3. Place Nozzle Wrench, A-316, on
Nozzle with Wrench Forks acing
toward Hydrant Barrel and locked onto
Nozzle Drive Lugs. Replace Nozzle Cap
and tighten until Cap rests loosely
against backside o Wrench.

1. Tighten Operating Nut to be sure
Main Valve is in the ully closed position.
4. Lubricate new Shoe and Bottom
Seat Ring O-ring.
6. Slip new Shoe in place being care ul
not to damage Bottom Seat Ring O-ring.
2. Remove all 6 Shoe Bolt Nuts.
5. Position Shoe to slip in place.
3. Slip o Hydrant Shoe.
9
MUELLER®SUPER CENTURION®3 0 FIRE HYDRANT
Changing Shoe
7. Replace Shoe Bolt Nuts. Tighten to
approximately 1800 in-lbs.

10
MUELLER®SUPER CENTURION®3 0 FIRE HYDRANT
Inserting Extension Section
Bef re rem ving any b lt(s) h lding the hydrant t gether, shut ff gate valve t is late hydrant fr m main water s urce.
L sen (d n t rem ve) ne n zzle cap tw turns and check f r water under pressure inside hydrant – bleed ff any pressure,
then rem ve n zzle cap c mpletely. Open hydrant main valve c mpletely. A c ntinu us fl w f water, n matter h w slight,
indicates hydrant is n t pr perly is lated fr m the main water supply, and that pr blem must be c rrected bef re any
hydrant disassembly can pr ceed. Disassembly f hydrant with pressurized water acting against the main valve c uld result
in unexpected ejecti n f hydrant parts, debris r high-pressure water stream, which c uld cause seri us b dily injury.
! WARNING
1. Remove Hold Down Nut, Thrust Bearing
and Operating Nut rom Bonnet. Lubricate
outside o Brass Sleeve and slide over
threaded stem end to prevent O-ring
damage. Unbolt Bonnet rom Upper Barrel
and remove. Remove Brass Sleeve.
4. Attach Extension Barrel to Lower Barrel
with solid Flange halves (without groove)
and Bolts, being sure Flange Gasket is in
place.
7. Check Bonnet O-ring** or proper position
and condition. Attach Brass Sleeve to Upper
Stem and lubricate outside to protect O-ring
Seals rom 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*. Be sure O-ring Seals
are in good condition at thread shoulder on
outside o Hold Down Nut and on inside
where contact is made with Operating Nut.
Remove Oil Filler Plug in side o Bonnet. Pour
MUELLER Hydrant Lubricant into Oil Reservoir
until it is level with Oil Filler Plug Hole.
Replace Oil Filler Plug.
2. Unbolt Sa ety Flange. Remove Upper
Barrel. Remove Upper Stem and Sa ety Stem
Coupling by removing the lower stainless
steel Cotter Pin and stainless steel Clevis Pin.
5. Assemble Upper Stem and Sa ety Stem
Coupling on to Extension Stem and retain it
with stainless steel Clevis Pin and stainless
steel Cotter Pin. MAKE SURE SAFETY STEM
COUPLING IS INSTALLED WITH “THIS END
UP” TOWARDS THE UPPER STEM.
8. Tighten Bonnet Bolts. Unscrew one Hose
Nozzle Cap slightly to bleed air. Open Hydrant
ully. Tighten Hose Nozzle Cap when water
starts lowing and check all lange connections
or leaks. Turn Operating Nut to ully closed
position and remove Hose Nozzle Cap to allow
Barrel to drain. Replace Hose Nozzle Cap.
9. 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.
3. Place Extension Stem and Extension
Coupling on Lower Stem and retain it with
stainless steel Clevis Pin and stainless steel
Cotter Pin.
6. Attach Upper Barrel with Sa ety Flange
Halves (with bevel on outer edge
downward) and Bolts; being sure Sa ety
Flange O-ring** is in groove in Upper Barrel.
CAUTION: Always fill the il
reserv ir with the b nnet installed,
the hydrant in its n rmal upright
p siti n, and the main valve fully
cl sed. If the hydrant is filled with
lubricant under any ther circum -
stances, excess lubricant can verfill
the b nnet and create a pressure
l ck. This c uld result in damage t
the seals r b nnet, r prevent
pr per hydrant perati n.
*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
FIRMLY TWO TIMES TO ASSURE THE NUT IS
PROPERLY TIGHTENED.
**TO DETERMINE CORRECT O-RINGS FOR
BONNET AND GROUND LINE FLANGES,
WHICH ARE SIMILAR IN APPEARANCE: SMALLER
DIAMETER O-RING IS USED AT BONNET
FLANGE; LARGER AT GROUND LINE FLANGE.