F31
F506
F504
F1
F2
F52
F59
F76
F500
F501
F38, F507, F508
F509
F505
F31
F34
F73
page 13
REPAIR PROCEDURES
TRAFFIC REPAIR:
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.
AVK Series 67 Post/Flushing Hydrants feature a safety
Breakable Flange (F505) and Breakable Stem Rod Coupling
(F508) design. This allows the hydrant head assembly to be
struck by a vehicle and “Break Away” reducing the impact to
the water main. In the event the hydrant head assembly has
been broken away, the following repairs will be necessary.
1. Visually inspect the Nozzle Section (F504), and it's
assembled components for damage. In most cases, the
Two Piece Breakable Flange (F505), Breakable Coupling
(F508), Coupling Pins (F507), Springpins (F38), Flange
O-ring (F73), and mounting hardware (F31,F34,F506)
need to be replaced.
2. Using the AVK Series 67 Hydrant Wrench, fully open the
hydrant to allow better access to the lower end of the
Upper Stem Rod (F503). Visually inspect the Upper Stem
Rod for damage. Remove the Breakable Coupling (F508),
Coupling Pins (F507), Springpins (F38), from the Upper
Stem Rod.
3. Refer to the "MAIN VALVE INSPECTION" procedures on
page 10, to remove the Nozzle Section from the Upper
Stem Rod.
4. If still present on the Lower Stem Rod (F510), remove the
Coupler Pin (F507), and Springpin (F38).
NOTE: If necessary, use a flashlight to verify that the Coupler
Pins or Springpins have not fallen into the Lower Barrel
(F509).
5. Attach the new Breakable Coupling (F508), to the Upper
Stem Rod with a new Coupler Pin and Springpin. Ensure
the Springpin is fully engaged onto the Coupler Pin. See
(Fig. 15).
6. Attach the Upper Stem Rod and Breakable Coupling to
the Lower Stem Rod using a new Coupling Pin and
Springpin.
7. Replace the Flange O-ring (F73) with a new one and
lightly grease it with a food grade grease.
8. Remove the Hose Nozzle Cap. Verify that the Stem Seal
O-rings (F502), are in place. Replace and lightly grease
them if necessary. (Refer to "Exploded Parts Breakdown"
on page 1.
Fig. 14
Traffic Repair
