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INSPECTION
NOZZLE DISASSEMBLY FOR INSPECTION: FIGURES 3A-3F
WARNING: For all of the following repair procedures, the hydrant must be isolated or the system depressurized and
drained before removing the hydrant components. Failure to do so may cause pressure to be released resulting in severe
injury or death.
Nozzle leaking from around the Nozzle Cap:
NOTE: AVK wet barrel hydrants have cap gaskets that are designed to allow residual water to drain from the caps. Perform
the following steps if water is leaking continuously from a nozzle.
1. Cycle the valve open then fully closed. See if residual water stops draining from the hydrant.
2. Verify that the valve is closed. Carefully remove the Hose Nozzle Cap (F19), or Pumper Nozzle Cap (F28), and Hose
Nozzle Cap Gasket (F115), or Pumper Nozzle Cap Gasket (F120), using an AVK Hydrant Wrench or adjustable hydrant
wrench.
3. Visually inspect the valve assembly for any damage or foreign material trapped between the valve and nozzle. If foreign
material is present, open the valve and remove the material.
4. If the rubber on the Valve Disc is damaged, refer the "VALVE DISC DISASSEMBLY FOR INSPECTION" and "VALVE
DISC REASSEMBLY FOR INSPECTION", sections of this manual for corrective action.
5. When the problem has been corrected, lightly grease the nozzle threads with a food grade grease that contains no
acetate or silicone, and replace the cap and gasket assembly.
6. Pressurize the hydrant and verify that the leaking has stopped.
Nozzle leaking from around the Nozzle O-ring area:
1. Remove Hose Nozzle Cap (F19), or Pumper Nozzle Cap (F28), and Hose Nozzle Cap Gasket (F115), or Pumper Nozzle
Cap Gasket (F120), using an AVK Hydrant Wrench or adjustable hydrant wrench. See Fig. "3A,3B&3F".
2. Using a drift punch, remove the Nozzle Retaining Screw (F114). See Fig. "3C"
3. Use the AVK Threaded Wet Barrel Nozzle Wrench to remove the Threaded Hose Nozzle (F116), or Threaded Pumper
Nozzle (F126), turning them in a counter clockwise direction.
4. Remove Threaded Hose Nozzle O-ring (F128), See Fig. 3D, or Threaded Pumper Nozzle O-ring (F131), See Fig. "3E",
and replace with a new one.
5. Lightly grease the o-ring with a food grade grease that contains no acetate or silicone.
6. Follow the steps in "REASSEMBLY AFTER INSPECTION", to reinstall the nozzles and caps.
NOZZLE REASSEMBLY AFTER INSPECTION:
NOTE: The valve may have to be turned in the opening direction to allow the nozzle to be inserted fully.
1. Screw the Threaded Hose Nozzle (F129), or Threaded Pumper Nozzle (F132) into the hydrant outlet, using the AVK
Threaded Nozzle Wrench.
2. Visually inspect the outlet to verify that the o-ring has not been displaced.
3. Use a drift punch and hammer to install a new Nozzle Retaining Screw (F114), as shown in Fig. 3C or Fig.3E.
4. Re-install the Hose Nozzle Cap (F19), or Pumper Nozzle Cap (F28), and Hose
Nozzle Cap Gasket (F115), or Pumper Nozzle Cap Gasket (F120), using an AVK Hydrant Wrench or adjustable hydrant
wrench.
5. Verify that the Cap has been secured.
6. Verify that all outlets have been fully closed.
7. Once the hydrant has been completely reassembled, turn on the supply valve to check for leaks.
