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Water leaks from under the casing cover
when the hydrant is on.
Tighten the three nuts under casing cover. If leak persists, remove
hydrant from the reservoir and inspect the rubber cup gasket for
cracks or damage. Remove the rubber cup gasket and measure the
distance from the top of the cast flange to the top of the reservoir
pipe. This dimension should be ½". If necessary, adjust the
flange. Reinstall the hydrant and check for leaks.
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Water leaks from the diverter while the
hydrant is on and the diverter is pulled down.
The O-ring seal in the diverter may be damaged or pulled loose from
the groove. Use a pair of needle nose pliers, stuck into the outlet of
the diverter, to remove the diverter. Inspect for damage or reinsert
the O-ring into the groove. Replace the diverter if necessary.
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Water leaks from the diverter, or fills
reservoir, when the hydrant is off.
Check the linkage adjustment. With the head cover off, lift the
handle and check if the linkage has a small amount of play and is not
binding. Adjust the lock nut and swivel nut down to increase the play.
If the hydrant continues to leak, the valve plug may be fouled or
damaged. Follow instructions for replacing the valve plug.
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Hydrant will not flow water through the
backflow preventer when the hydrant is on.
If water will not flow through the backflow preventer with the
diverter pulled down, the backflow preventer may be obstructed or
damaged. Remove the backflow preventer and check to see if the hydrant
flows water with the backflow preventer removed. Inspect the backflow
preventer for obstruction or damage.
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Hydrant will not drain when shut off.
The reservoir may be full. Operate the hydrant at full flow,
through the diverter, for a minimum of 30 seconds to evacuate the
reservoir.
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Handle adjustment for maintained flow.
The Model S4 handle can be adjusted in the field so it will not
automatically spring close when the handle is released and can be left
in a full open position. Turn the stop screw under the handle in,
clockwise, just enough so when the handle is pushed down in a full
open position, the handle will stay and not spring closed. To close
the hydrant, simply lift the handle and it will spring close.
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Hydrant removal from the reservoir.
To remove the hydrant from the reservoir, shut off the water
supply and remove the three nuts and washers under the casing cover.
Pull the hydrant straight up and remove from the reservoir.
To reinstall the hydrant, clean and inspect the two venturi
O-rings and the rubber cup gasket. Replace if damaged. Lubricate
O-rings with silicone grease or other non-toxic lubricant that is safe
for rubber. Insert the hydrant in the reservoir. Align the studs with
the holes in the flange. Reinstall and tighten the washers and nuts.
INSTRUCTIONS FOR
REPLACING OPERATING ROD EXTENSION AND/OR PACKING NUT
WOODFORD MODEL S4/S4H YARD HYDRANT
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Using a 9/16" socket, remove the three nuts and washers
under from under the casing cover (#25). |
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Pull the hydrant straight up and out of the reservoir. A pry
bar may be helpful to break loose the hydrant from the reservoir seal. |
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Lay the hydrant on its side and hold or lock the handle down
in an open position. |
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Remove the snap ring (#40), screen (#39) and valve plug
guide (#38). Unscrew the valve plug (#37) with a screwdriver. If the rod turns, have
someone secure the rod at the top of the hydrant, under the head cover. |
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Remove head cover (#12). |
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Remove handle pin, handle, linkage,
washer swivel, locknuts and spring. (#1-5, 7, 8, 13-15 and 17). |
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Pull operating rod assembly out through the top of the head
casting. |
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If needed, install new packing nut, with O-ring,
(#18). Do
not over tighten. |
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If needed, install new operating rod extension
(#16) on the
operating rod (#42). |
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Install operating rod assembly through the top of the head,
only far enough to replace washer, swivel and locknuts, and spring (#13,
14, 15, and 17). |
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Using a Phillips head screwdriver to guide the rod through
the venturi seat hole (#35), gently pry down on the rod, compressing the spring. Once the
rod is through the hole, install the valve plug, valve plug guide, screen and snap ring.
NOTE: Replace valve plug if damaged. |
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Install the operating link assembly
(#1-5) and handle (#7)
with handle pin (#8). |
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Adjust the swivel nut and lock nut (#14 &
#15) so there
is a small amount of clearance between the operating link assembly and the plastic washer
(#13). Approximately 1/32" to 1/16". Try to keep the valve plug from turning, to
prevent damage to the valve plug. |
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Before reinstalling the hydrant in the
reservoir check the operation. Also make sure the venturi O-rings
(#36) are clean. |
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Reinstall the hydrant in the reservoir. |
Technical
Notes