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AVK A2780 Field Maintenance And Instruction Manual

High pressure, nostalgic, dry barrel hydrant
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AVK SERIES 2780 - HIGH PRESSURE,
NOSTALGIC, DRY BARREL HYDRANT
FIELD MAINTENANCE AND
INSTRUCTION MANUAL

TABLE OF CONTENTS

EXPLODED ASSEMBLY / PARTS LIST
- TESTING
- THRUST BEARING OPERATING ASSY.
WARRANTY
American AVK Company
An ISO 9001 registered company
Copyright © AVK Group A/S 2019
- LUBRICATION
Maintenance Manual Series 2780
*Subject to change without notice. (rev. 05/19 L)

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  • Page 1: Table Of Contents

    AVK SERIES 2780 - HIGH PRESSURE, NOSTALGIC, DRY BARREL HYDRANT FIELD MAINTENANCE AND INSTRUCTION MANUAL TABLE OF CONTENTS EXPLODED ASSEMBLY / PARTS LIST INTRODUCTION / DESCRIPTION RECEIVING AND STORAGE INSTALLATION AND TESTING - INSTALLATION - TESTING OPERATION AND MAINTENANCE - HYDRANT TOOLS...
  • Page 2 American AVK Series 2780 Nostalgic Hydrant Exploded Parts Breakdown As of Dec. 2018, the upper Anti Friction Washer has been replaced with a 3 piece roller bearing assembly page 1...
  • Page 3 Item No. Description Material Weathershield Bolt 304 Stainless steel Weathershield Grey Iron, ASTM126, Class “B” Lockplate Bolt 304 Stainless steel Lock Plate 304 Stainless steel Inner Thrust Nut O-ring Thrust Nut Copper Alloy Outer Thrust Nut O-ring Anti Friction Washer Nylon Lubrication Hole Seal Operating Nut...

  • Page 4: Introduction / Description

    Inspect the hydrants upon receipt for damage in shipment. Note any damage on the bill of lading and have the driver sign it. Notify American AVK. Unload all of the hydrants carefully to avoid damage. Verify that the hydrants have the correct direction to open, the correct nozzle configuration and threads, the correct operating nut size and shape, the correct depth of bury, and the correct inlet connection.
  • Page 5 Concrete collar for protection of traffic model hydrants. 2' min. 6" Curb 1/3 cubic yard drain field rock. Grounding from hydrant base to Zinc Bury Anode for providing cathodic protection. Effective, April 2015. Concrete (Anode & grounding wire not supplied.) Supply Valve C o n c r e t e thrust block...
  • Page 6 3. For further instructions refer to the AWWA M-17 Hydrant Manual, Chapter 4.3. EXTERNAL DRAIN PLUGGING American AVK offers the option of External or Internal Drain Facility Plugging. 1. Prior to installation, for external plugging, visually verify for factory installed plugs or screw two Brass Plugs (F55) into the Brass Fittings (F56) located on the Main Valve Flange (F57) using a 3/16”...
  • Page 7 Fig. 2 Internal Drain Plugging page 6...

  • Page 8: Operation And Maintenance

    OPERATION AND MAINTENANCE HYDRANT TOOLS American AVK offers a standard toll kit for routine maintenance requirements. The kit is comprised of the following AVK specific tools. 1. AVK Seat Wrench: Part Number: 27-150-30-100 For use in removal and replacement of the MAIN VALVE/ SEAT ASSEMBLY.

  • Page 9: Operation

    OPERATION The American AVK Series 2780 Nostalgic Hydrant is designed to be an easily operated, low torque, high flow fire hydrant. It will not require excessively high loads to operate. It is possible to damage the hydrant by forcing it beyond its normal operational limits.

  • Page 10: Maintenance Procedures

    MAINTENANCE PROCEDURES The American AVK Series 2780 Dry Barrel Hydrant is designed to be a trouble free, easy to maintain hydrant. The following steps are recommended to provide trouble free operation. GREASE LUBRICATION (Fig. 4A) WARNING: On a partially disassembled hydrant under line pressure, pressing down on the stem could force open the Main Valve (F61) and allow it to slam shut, creating a water hammer.

  • Page 11: Inspection

    5. Loosen the cap, then finish removing the cap/nozzle assembly. NOTE: AVK hydrants manufactured after 2004 have a "fifth lug" located at the 6 o'clock position in the outlets. This prevents the nozzles from being installed with the slotted lug in the wrong location.
  • Page 12 Nozzle leaking from around the Nozzle Cap: 1. Remove the Hose Nozzle Cap (F19), or Pumper Nozzle Cap (F28), using an AVK Hydrant Wrench or adjustable hydrant wrench. 2. Remove and replace the Hose Nozzle Cap Gasket (F22), or Pumper Nozzle Cap Gasket (F27), and replace the cap and gasket assembly.
  • Page 13 Secondary set screw Nozzle lug rotated between nozzle section lugs to allow cap removal. Fig. 6A Fig. 6B Fig. 6C Secondary set screw Fifth Lug Dimple Fig. 6D Fig. 6E Fig. 6F Secondary set screw DETAIL A SCALE 1 : 5 Dimple Dimple Fifth Lug...

  • Page 14: Disassembly For Inspection

    Stem Seal O-rings (F15) and the Barrel Gasket (F17) for damage. 7. To remove the Valve Seat Ring (F51) and Main Valve Assembly, Slide the AVK Seat Wrench ( Fig. 7G) over the Upper Stem Rod (F16) and engage the seat removal pin. Turn the tool counterclockwise, (approximately 6 turns) until the Valve Seat Ring has disengaged from the Drain Ring (F54).

  • Page 15: Reassembly After Inspection

    CAUTION: Take care not to cross thread the Seat Ring (F51), during reassembly. 1. Using the AVK Seat Wrench, re-install the Main Valve and Stem assembly. Using the seat wrench, rotate the main valve and stem assembly counter clockwise until you feel a slight drop. Then tighten clockwise until the Main Valve/Stem assembly is completely tightened.
  • Page 16 HydrantWrench Fig. 7A Fig. 7B Fig. 7C AVK Seat Wrench Oil Saver Fig. 7D Fig. 7E Fig. 7F AVK Seat Wrench Alignment Tool Fig. 7G Fig. 7H Fig.7J page 15...

  • Page 17: Repair Procedures

    AVK Dry Barrel Hydrants feature a safety Breakable Flange (F33) and Breakable Stem Rod Coupling (F37) design. This allows the hydrant head assembly to be struck by a vehicle and “Break Away”...
  • Page 18 9. Install the Bonnet Bolts, Washers, and Nuts Finger tight. 10. Using the AVK Seat Wrench, install the Stop Nut (F11). Do not over tighten the Stop Nut! Fill the lubrication reservoir with the appropriate food grade oil or grease that contains no acetate or silicone.

  • Page 19: Optional Equipment

    “Open Right Hydrants”. Remove the lower Anti Friction Washer (F8) and set aside with the operating nut. 5. Using the socket wrench end of the AVK T-wrench, remove the Stop Nut (F11) from the Upper Stem Rod (F16).

  • Page 20: Extension Kits

    28. Install the Bonnet Bolts (F12), Nuts (F18), and Washers (F13) and tighten finger tight. 29. Using the socket portion of the AVK T-wrench, reinstall the Stop Nut (F11). Spin the stop nut down until it stops, and then snug it about 1/4 turn tighter.
  • Page 21 Detail "D" Standpipes installed with the recessed side towards the Lock Rings Detail "E" Fig. 10 Extension Kit ** As of Nov. 1, 2011, the Spider and Spider Bolt are no longer required in AVK dry barrel hydrants page 20...

  • Page 22: Tamperguard Weathershield

    OPTIONAL EQUIPMENT TAMPERGUARD WEATHERSHIELD: The American AVK Series 27/47X Tamper Resistant Weathershield Kit consists of one Tamper Resistant Weather Shield (F93), one Tamper Resistant Lockplate (F94), and one Tamper Resistant Lockplate Screw (F95). A Lock with Key (F97) and Lock Pin (F96) are optional.
  • Page 23 Stop Nut (F11) is secure at the bottom of the threads of the Upper Stem Rod (F16). Use the AVK T-Wrench to ensure that the Stop Nut is not backed off. 5. Replace them with the new Operating Nut (F10), and one Anti Friction Washer (F8), placed below the Operating Nut shoulder.

  • Page 24: Troubleshooting Guide

    Probable Cause: Stem Rod assembly has been over torqued, broken, or become disconnected from Main Valve. Corrective Action: Contact American AVK Sales Representative for further troubleshooting and special tool requirements. PROBLEM: Hydrant will not drain. Probable Cause: Drain holes may be plugged or blocked.
  • Page 25 Hydrant or supply vale is not fully open. Corrective action: Verify that the hydrant is fully open. The AVK Series 2780 hydrant main valve fully opens in approximately 19-21 turns. Also locate and verify that the supply valve is fully open.

  • Page 26: Parts And Service

    PARTS AND SERVICE For information on parts and service for your area contact American AVK. Make a note of the hydrant model number and size located on the hydrant and contact: American AVK Company 2155 N. Meridian Blvd Minden, NV 89423...
  • Page 27 page 26...

This manual is also suitable for:

2780 series

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