Woodford HC67 Troubleshooting And Maintenance

MODEL HC67 HOT/COLD WALL HYDRANTS
TROUBLESHOOTING AND MAINTENANCE
Packing leak. Water leaks from behind the mixer handle. (Prior to Oct 2001)
For HC67 hydrants built prior to Oct 2001, an upgrade casing tube assembly with an O-
ring rod seal may be required to keep a packing leak from frequently reoccurring.
Manufactured date may be found on I.D. Ring under head nut or stamped on face of
casting.
Call Woodford Mfg. for assistance in ordering appropriate length tube assembly (Part No.
560XX).
Shut off water supply and remove mixer handle and lock nut. Remove and discard
existing tube assembly. IMPORTANT: Do not remove packing ring or rod assembly.
Carefully, so not to damage O-ring , insert new casing tube assembly over mixer rod.
Tighten and replace lock nut and mixer handle. Note: Never use petroleum-based
products to lubricate the O-ring. Turn on water supply and check for leaks.
IMPORTANT: Check handle for proper orientation. Make sure that when the handle is
turned to cold, only cold water is given and when turned to hot, only hot water is given.
Adjust handle on the stem as necessary.
Hydrant will not flow water when the hydrant is on.
Remove the vacuum breaker and check to see if the hydrant flows water with the vacuum
breaker removed. Inspect the vacuum breaker for obstruction or damage. If the hydrant
still does not flow water with the vacuum breaker removed, remove the hydrant side rod
assembly and turn on the water supply to flush the casing. If this does not fix the
problem, follow instructions on how to repair stuck check valves below.
Stuck check valves. Hydrant will not flow water when the hydrant is on, or only flows hot or
cold but not both.
If the mixer body, inside the wall at the inlet, is exposed to freezing temperatures, the
mixer body can freeze and extrude the check valve into the shuttle housing and it will not
open to flow water. To service, you have to access the supply connection inside or behind
the wall. Remove supply line and shuttle housing assembly. Free the check valve by
dismantling or replace with new shuttle housing. Make sure mixer body and supply are in
a non-freeze area.
Water leaks from drain hole, under the nozzle, and/or air vent in stem screw when the hydrant is
on.
Plunger (50250) is damaged and needs to be replaced. Follow instructions below on how
to remove the operating rod.
Water leaks from the nozzle or from the drain hole when hydrant is off.
If it's a new installation, most likely caused by debris or an obstruction in the seat.
Follow instructions below on how to remove the operating rod and inspect the plunger for
damage and flush the casing before reassembling.