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MODEL Y2 YARD HYDRANT

TROUBLESHOOTING AND MAINTENANCE

Water leaks from the diverter nozzle when the hydrant is off.

Check the closing force of the handle. The handle, at the end of the closing stroke, should "snap" closed. Follow instructions below on how to adjust the linkage.

The plunger (10106) may be worn or damaged and needs to be replaced. Follow instructions below on how to remove the operating pipe.

If the hydrant leaks just after installation, the valve seat may be fouled with debris, such as small rocks. The operating rod will have to be removed and the hydrant casing flushed.

Packing leak. Water leaks from around the brass stem below the linkage when the hydrant is on.

The packing nut will occasionally need to be tightened to stop a packing leak. Tighten the packing nut until snug and the leak stops. Persistent leaks will require a new packing (10101).

Hydrant leaks from below the ground level when the hydrant is on.

A small leak may be the result of a leak at the drain hole. Replace the plunger if it is old and worn. Follow instructions below on how remove the operating pipe. A large leak may be the result of a hole in the pipe casing caused by electrolysis corrosion. Some soil conditions can cause premature failure of the pipe casing near the valve body. Brass pipe is recommended for these conditions.

Hydrant will not drain when shut off.

Improper linkage adjustment (not enough tension) may prevent the hydrant from draining properly. A poor drain field or a blocked drain hole will prevent drainage.

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.

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 inspect for obstruction or damage.

Linkage adjustment.

The adjustment can be made with the water supply on by tightening the packing nut enough to hold the hydrant closed. To adjust the linkage, remove the lower link bolt that connects the lower link to the clevis assembly. Loosen the set screw in the lower link. Turn the lower link out (counterclockwise) to increase tension and in to decrease tension.

Operating pipe assembly removal.

Shut off the water supply to the hydrant. Lift the handle to the open position. Remove the handle and linkage assembly. Loosen the packing nut. Remove the head casting using two pipe wrenches, one on the pipe and one on the head casting. Remove the operating pipe assembly by gripping the pipe (not the brass stem) with vise grips and prying up. To remove the plunger, use either pipe wrenches or vise grips. When reinstalling the operating pipe assembly in the hydrant, use a soft mallet or a block of wood to drive the plunger into the valve seat. Applying a lubricant that is safe for rubber such as silicone on the plunger rubber will aid in seating the rubber. Reinstall the head casting, handle and linkage. Adjust the linkage to the proper tension.