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Meggitt F251 Series Maintenance Manual

Hydrant coupler
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Maintenance Manual
HYDRANT COUPLER
F251 Series
MMF251
Revision 4.0
28 February 2014
Shown with additional
coupler modifications
Meggitt (North Hollywood), Inc. Proprietary Information
The information contained in this document is disclosed in confidence. It is the property of Meggitt (North Hollywood), Inc. and shall not be used,
disclosed to others, or reproduced in whole or in part without the express written consent of Meggitt (North Hollywood), Inc. If consent is given, this
notice shall appear in any such reproduction. These commodities, technology, or software were exported from the United States in accordance with
the export administration regulations. Diversion contrary to U.S. law is prohibited.
SENSITIVE BUT UNCLASSIFIED-EXPORT CONTROLLED-EAR RESTRICTED.
These commodities, technology or software are exported from the United States of America in accordance with the Export Administration
Regulations. ECCN EAR99. Diversion contrary to U.S. law is prohibited.
Copyright © 2014 Meggitt (North Hollywood), Inc.

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  • Page 1 The information contained in this document is disclosed in confidence. It is the property of Meggitt (North Hollywood), Inc. and shall not be used, disclosed to others, or reproduced in whole or in part without the express written consent of Meggitt (North Hollywood), Inc. If consent is given, this notice shall appear in any such reproduction.
  • Page 2 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series REVISION RECORD Keep this record in the front of the manual. When you get the revisions, put the revised pages in the manual. Write the revision number, date issued and your initials on this page.

  • Page 3: Table Of Contents

    Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series TABLE OF CONTENTS SUBJECT PAGE IMPORTANT SAFETY INSTRUCTIONS ......................A  INTRODUCTION ............................. 1  DESCRIPTION AND OPERATION ......................... 2  FAULT ISOLATION ............................5  DISASSEMBLY ............................... 6  CLEANING ..............................10  INSPECTION ..............................12 ...

  • Page 4: Important Safety Instructions

    Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS! This manual contains important instructions that shall be followed during installation and maintenance of the Hydrant Coupler. The following are general safety precautions that are not related to specific procedures and therefore do not appear elsewhere in this publication.
  • Page 5 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series Equipment Safety Information The following safety information briefly discusses hazards peculiar to the equipment, which are likely to be encountered during maintenance activity. COUPLER INSTALLATION AND OPERATION PRECAUTIONS ...

  • Page 6: Introduction

    The information and procedures contained in this manual have been prepared to assist qualified repair personnel in off-aircraft maintenance of the Hydrant Coupler (coupler). The instructions provide information necessary to perform maintenance functions. The Coupler is manufactured by Meggitt (North Hollywood), Inc., 12838 Saticoy Street, North Hollywood, California 91605.

  • Page 7: Description And Operation

    Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series DESCRIPTION AND OPERATION Description The Hydrant Coupler (coupler) (see Figure 1) provides the means of connecting 4-inch hydrants and adapters conforming to API Standard 1584. The various optional configurations permit the use of several thread and hose sizes.
  • Page 8 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series Figure 1. Hydrant Coupler USE OR DISCLOSURE OF DATA ON THIS PAGE IS SUBJECT TO THE RESTRICTIONS ON THE TITLE PAGE OF THIS DOCUMENT 28 Feb 2014 Revision 4.0...

  • Page 9: Table 1 Leading Particulars

    Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series Leading Particulars (Refer to Table Table 1 Leading Particulars Service ........................Automotive and Aviation Fuels Operating Pressure Maximum Working ....................... 200 psi (1380 kPa) Peak Surge .......................... 305 psi (2100 kPa) Pressure Drop (connected to F368 Hydrant) (approximate) ...................

  • Page 10: Fault Isolation

    Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series FAULT ISOLATION General Refer to Table 2 for fault isolation information. Locate suspected faulty component and take appropriate remedial action. Table 2 Fault Isolation FAULT POSSIBLE CAUSE CORRECTIVE ACTION...

  • Page 11: Disassembly

    Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series DISASSEMBLY Overhaul Parts Kits Refer to the ILLUSTRATED PARTS LIST section for the Overhaul Parts Kit information. Disassemble the Hydrant Coupler A. (Mods B – K and M) Swivel Assembly Removal (See...
  • Page 12 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series D. Disassemble the Coupler Assembly (See IPL Figure Note: Before disassembly; if coupler assembly is equipped with elbow (IPL Figure 2, 14); remove screws (10), washers (11) and nuts (12) from coupler assembly.
  • Page 13 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series 14. Remove together; handle (17) felt wiper (18), bushing (20), O-ring (21), shaft (22), and crank (27) from body (37). Note: Look at the relative positions of the handle (17) and the crank (27) for assembly reference.
  • Page 14 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series 23. Check condition of shear pin (6), if bent or cracked; discard. Check groove dimension as follows: (Mods: Basic,B-K,M,R: p/n 430141, Gold Shear Pin) The gold shear pin (6) groove dimensions shall measure;...

  • Page 15: Cleaning

    Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series CLEANING Cleaning Materials Refer to Table 3 for recommended cleaning materials. Suitable equivalent cleaning materials may be substituted for the items listed. Table 3 Recommended Cleaning Materials DESCRIPTION SPECIFICATION...
  • Page 16 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series WEAR EYE PROTECTION WHEN USING COMPRESSED AIR. DO NOT DIRECT AIRSTREAM AT PERSONNEL OR LIGHT METAL PARTS. C. Dry parts with clean lint-free tissues or clean, dry compressed air.

  • Page 17: Inspection

    Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series INSPECTION General A. Under strong light and magnification, Look at all parts in accordance with the general criteria specified in Table B. Repair minor damage in accordance with local directives. If damage is major or beyond simple repair, replace the part.

  • Page 18: Assembly

    Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series ASSEMBLY Overhaul Replacement Parts Refer to the ILLUSTRATED PARTS LIST section for recommended replacements parts information. Assembly Materials Refer to Table 5 for recommended assembly materials. Suitable equivalent materials may be substituted for the items listed.

  • Page 19: Figure 2.  Coupler Section Assembly

    Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series Install shear pin (6) into latching lug (7). Install pin, groove (5) thru latching lug (7) to shear pin (6). Repeat for remaining lugs. Note: Gold Shear pins shall be used on F251 couplers mated on the F239 pressure control coupler assembly.
  • Page 20 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series Install felt wiper (4) in wiper groove of shroud (3). Install shroud (3) on body (37). Make sure the latching lugs (7) are seated correctly for the shroud to slide past.
  • Page 21 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series C. (Mods B – K and M) Assemble and Install the Swivel Assembly (See IPL Figure Apply petroleum jelly to new O-ring (13) and install in groove on elbow (14). Engage the...

  • Page 22: Illustrated Parts List

    Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series ILLUSTRATED PARTS LIST General This section lists, describes, and illustrates all detail parts required for maintenance support of the Hydrant Coupler. Scope of Information A. The parts list is arranged in the general order of disassembly. The listing is indentured to show the relationship between each part and its next higher assembly.
  • Page 23 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series IPL Figure 1. Hydrant Coupler, F251 USE OR DISCLOSURE OF DATA ON THIS PAGE IS SUBJECT TO THE RESTRICTIONS ON THE TITLE PAGE OF THIS DOCUMENT 28 Feb 2014...
  • Page 24 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series UNITS DESCRIPTION FIG. ITEM PART NUMBER 1 2 3 4 5 6 7 CODES ASSY HYDRANT COUPLER F251 900001-101 . DUST COVER ASSY ........... 2763486-101 . GUARD ................. 901004-104 .
  • Page 25 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series UNITS DESCRIPTION FIG. ITEM PART NUMBER 1 2 3 4 5 6 7 CODES ASSY HYDRANT COUPLER F251 AN960C516L . WASHER ..............901014-101 . PIN ................MS20392-4C33 . PIN ................
  • Page 26 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series IPL Figure 2. Swivel Assembly F597 USE OR DISCLOSURE OF DATA ON THIS PAGE IS SUBJECT TO THE RESTRICTIONS ON THE TITLE PAGE OF THIS DOCUMENT 28 Feb 2014...
  • Page 27 Meggitt Fuelling Products Maintenance Manual (MMF251) Hydrant Coupler – F251 Series UNITS DESCRIPTION FIG. ITEM PART NUMBER 1 2 3 4 5 6 7 CODES ASSY SWIVEL ASSEMBLY F597 2- 1 430547 . SEAL ................2763539-101 . RING, SAFETY ...............

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