TO 13F4-4-121 2015 edition.pdf

TO 13F4-4-121

TECHNICAL MANUAL

OPERATION, SERVICE AND MAINTENANCE

WITH

ILLUSTRATED PARTS BREAKDOWN

FIRE EXTINGUISHER, WHEELED

LIQUIFIED GAS, 150 LB. CAPACITY

MODEL 600, PART NO. 07351,

03496 AND 05673

NSN 4210-01-140-2233

NSN 4210-01-332-0793

NSN 4210-01-457-9062

AMEREX CORPORATION

(FSCM 54905)

F09603-82-C-2199

This manual supersedes Interim Operational Supplement 13F4-4-121S-2, dated 21 October 2013; and Interim Operational Supplement 13F4-4- 121S-3, dated 26 November 2013.

DISTRIBUTION STATEMENT A - Approved for public release; distribution is unlimited. PA Case Number 05-07138. Other requests for this document shall be referred to 406 SCMS/GUEE, Robins AFB, GA 31098. Questions concerning technical content shall be referred to AFLCMC/WNZEC.

Published Under Authority of the Secretary of the Air Force

10 JANUARY 1991 CHANGE 12 - 8 APRIL 2015

BASIC AND ALL CHANGES HAVE BEEN MERGED TO MAKE THIS A COMPLETE PUBLICATION.

NOTE: The portion of the text affected by the changes is indicated by a vertical line in the outer margins of the page. Changes to illustrations are indicated by shaded or screened areas, or by miniature pointing hands.

INSERT LATEST CHANGED PAGES. DESTROY SUPERSEDED PAGES.

LIST OF EFFECTIVE PAGES

*Zero in this column indicates an original page.

USAF

Page *Change No. No.

Page *Change No. No.

Page *Change No. No.

Dates of issue for original and changed pages are:

Title A i ii iii iv Blank 1-1 1-2 - 1-3 1-4 Blank 2-1 - 2-2 3-1 3-2 4-1 - 4-2 4-3 4-4 5-1 - 5-5 5-6 5-7 5-8 - 5-11 5-12 5-13 5-14 - 5-15 5-16 - 5-17 5-18 5-19 - 5-20 5-21 5-22 - 5-28 5-29 5-30 5-31 Added 5-32 Blank 6-1 6-2 Blank 7-1 7-2 7-3 - 7-4 7-5 7-6

7-7 7-8 7-9 7-10 - 7-13 7-14 Blank 8-1 8-2

Original. . . . . . . . . .0 . . . . . 10 January 1991 Change . . . . . . . . . .1 . . . . . . 1 January 1992 Change . . . . . . . . . .2 . . . . .15 October 1992 Change . . . . . . . . . .3 . . . . . . 15 March 2002 Change . . . . . . . . . .4 . . . 5 September 2002 Change . . . . . . . . . .5 . . . . . . . 10 April 2005 Change . . . . . . . . . .6 . . . . . . . 15 May 2007

Change . . . . . . . . . . 7 . . . . . . . 19 June 2007 Change . . . . . . . . . . 8 . . . . .25 October 2010 Change . . . . . . . . . . 9 . . . . . . . 21 May 2012 Change . . . . . . . . . . 10 . . .8 September 2012 Change . . . . . . . . . . 11 . . . . . . . 22 July 2013 Change . . . . . . . . . . 12 . . . . . . . 8 April 2015

A Change 12

TOTAL NUMBER OF PAGES IN THIS PUBLICATION IS 68, CONSISTING OF THE FOLLOWING:

TABLE OF CONTENTS

Section Paragraph Page

I INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1-5 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-7 HOSE WITH SUPPORT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-9 AGENT STORAGE CYLINDER ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-11 CARRIAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-13 LEADING PARTICULARS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

II PREPARATION FOR USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2-1 UNPACKING AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2-2 New Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2-3 New Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2-4 Used Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 2-5 PREPARATION FOR OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

III THEORY OF OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3-1 EXTINGUISHING AGENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3-7 EQUIPMENT OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

IV OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-1 CONTROLS AND INSTRUMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-2 Pressure Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-3 Discharge Valve and Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-4 Nozzle Valve and Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-5 Nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-6 Agent Level Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-7 Pressure Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-8 OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-9 Pre-Operation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-10 Operation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-11 SHUTDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4-13 POST FIRE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

V INSPECTION, MAINTENANCE, RECHARGING, AND TESTING . . . . . . . . . . . . . . . . . . . 5-1 5-1 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 5-7 INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 5-9 SERVICE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 5-12 COMPLETE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4 5-15 CORRECTIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5 5-17 NOZZLE VALVE ASSEMBLY PART NUMBER 05011 . . . . . . . . . . . . . . . . . 5-6 5-18 DISCHARGE VALVE ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8 5-19 CYLINDER ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12 5-20 AGENT LEVEL GAUGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13 5-21 HOSE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15

5-22 HOSE SUPPORT BRACKET AND NOZZLE MOUNT ASSEMBLY . . . . . . . 5-16

5-23 WHEEL AND TIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16 Change 11 i

TABLE OF CONTENTS - Continued

Section Paragraph Page 5-24 CARRIAGE ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17 5-26 RECHARGE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17 5-27 RECHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17

5-29 12 YEAR HYDROSTATIC PROOF PRESSURE TEST OF CYLINDER . . . . . 5-21

AND HOSE/COMPLETE MAINTENANCE (OPTIONAL)

5-30 TROUBLE SHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-21 5-31 CORROSION PREVENTION AND PAINTING. . . . . . . . . . . . . . . . . . . . . . . . . 5-31

VI PREPARATION FOR SHIPMENT AND STORAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 6-1 SHIPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 6-3 STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 6-3 DISPOSAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

VII ILLUSTRATED PARTS BREAKDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 7-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7-2 FEDERAL SUPPLY CODE FOR MANUFACTURERS (FSCM) . . . . . . . . . . . 7-2

VIII NUMERICAL INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

LIST OF ILLUSTRATIONS

Number Title Page

1-1 150 lb. Wheeled, Liquified Gas, Fire Extinguisher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2-1 Pressure-Temperature Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 4-1 150 lb. Wheeled, Liquified Gas, Fire Extinguisher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 5-1 Discharge Hose Coiling Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-24 5-2 Agent Level Gauge Body and Plastic Indicator Face Part Number 06780 . . . . . . . . . . . . . . . . . 5-25 5-3 Agent Level Gauge Alignment Part Number 06780 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-25 5-4 Fire Extinguisher Recharge System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26 5-5 Recharge Adapter Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-28 5-6 Hydrotest Adapter Amerex Corp. Part Number 05152 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-29 5-7 Reflective Material Location and Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-30 7-1 150 lb. Wheeled, Liquified Gas, Fire Extinguisher . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3 7-2 Nozzle Valve Assembly, 05011, Amerex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6 7-3 Discharge Valve, 05006, Amerex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8 7-4 Nozzle Valve Assembly, 05295 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10 7-5 Pull Pin and Lanyard Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12 ii Change 12

LIST OF TABLES

Number Title Page

1-1 Leading Particulars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 3-1 Halon 1211 Physical Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 5-1 Allowable Leakage Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-20 iii/(iv blank)

SECTION I

INTRODUCTION

1-1 INTRODUCTION.

1-2 The purpose of this manual is to provide operation and maintenance personnel with the information necessary to operate, service, maintain, and repair the 150 pound wheeled, liquified gas fire extinguishers, Model 600, part number 07351, 03496 and 05673. The Model 600 fire extinguisher (see Figure 1-1) is produced by Amerex Corporation, PO Box 81, Trussville AL 35173 (FSCM 54905).

Figure 1-1. 150 lb. Wheeled, Liquified Gas, Fire Extinguisher Change 12 1-1

1-3 Section I, in this manual, contains a brief description of the fire extinguisher and lists the leading particulars. Section II provides instructions necessary to prepare the fire extinguisher for use. Section III describes the fire extinguishing agent and how the equipment operates. Section IV covers unit operation. Section V provides maintenance instructions for the fire extinguisher and includes preventive maintenance, service maintenance, corrective maintenance and repair. Section VI includes information on unit shipment and storage. Section VII contains the illustrated parts breakdown and illustrations of the fire extinguisher with key index numbers to aid in locating and identifying the detail parts. Section VIII contains an alpha-numerical listing of all part numbers.

1-4 The 150 pound wheeled, liquified gas fire extinguisher is a portable fire extinguisher capable of being towed at speeds up to 15 mph over a level, paved surface. The wheeled fire extinguisher is used to provide large scale, fire protection where mobility is needed to reach local, separated, multiple fire hazard areas and combat flammable liquid, electrical or carbon-aceous fires. The unit is charged with 150 pounds of Bromochlorodifluoromethane, Halon 1211 (BCF) fire protection agent and pressurized with nitrogen (N2) to 200 ± 20 psig to facilitate agent discharge.

1-5 DESCRIPTION.

1-6 Basically, the 150 pound, wheeled, liquified gas, fire extinguisher consists of a hose with support, agent storage cylinder assembly and carriage for transportation.

1-7 HOSE WITH SUPPORT.

1-8 The hose, which provides mobility to the operator when fighting a fire, has a nozzle valve assembly at its end to permit flow control. The hose support is used to mount the hose and nozzle. The extinguisher hose is looped around the hose support and the nozzle valve assembly is held by the nozzle mount and clips. Some extinguishers may have an upgraded hose rack/ nozzle mount which utilizes a retaining ring and no longer uses the hose clips.

1-9 AGENT STORAGE CYLINDER ASSEMBLY.

1-10 The agent storage cylinder assembly is equipped with the cylinder discharge valve with safety outlet, pressure valve, and agent level gauge. The cylinder assembly is steel fabricated, conforms to the Department of Transportation 4BW240 Specification, and has an internal volume of 4,350 cubic inches, nominal. The cylinder assembly is used to store the extinguishing agent under pressure. The cylinder assembly mounts between the carriage and hose support assemblies.

1-11 CARRIAGE.

1-12 The carriage is a welded steel tube assembly with two (2) either pneumatic or semi-pneumatic tires and wheels mounted on a steel axle. The carriage is equipped with a three (3) inch I.D. lunette for towing. The axle is welded to the carriage and positions the wheels off the ground when the unit is in a vertical position. The carriage assembly provides mobility and is used to mount the cylinder assembly with hose support.

1-2

1-13 LEADING PARTICULARS.

1-14 Leading particulars for the 150 pound, wheeled, liquified gas, fire extinguisher are contained in Table 1-1.

Table 1-1. LEADING PARTICULARS

Fire Extinguisher Agent Halon 1211

(Bromochlorodifluoromethane) In accordance with Specification MIL-B-38741

Pressurant Gas Nitrogen (N2)

Operating Temperature -40°F (18°C) to -135°F (57°C) Safety Outlet Discharge

400 to 500 psig at 70°F (20.1°C)

Approx Discharge Time 44 Seconds Range-Agent Throw 35 to 50 ft Weight:

Agent 150 lbs normal Vehicle Charged 325 lbs ± 15 lbs

Dimensions:

Height 59 inches Width 29 inches Depth 36 inches

Cylinder Assembly:

Design DOT 4BW240 Internal Volume 4,350 cubic inches nominal

Pressure:

Service 200 ± 20 psig Test 480 psig Burst 960 psig minimum

Wheel:

Type Pneumatic, light duty. Some units have been delivered with semi-pneumatic wheels.

Tire Size 16 inches X 4.00 inches

Hose:

Type Rubber Size 3/4 in. I.D.

Length 50 ft 1-3/(1-4 blank)

SECTION II

PREPARATION FOR USE

2-1 UNPACKING AND HANDLING.

2-2 New Unit. The new 150 pound, wheeled, liquified gas, fire extinguisher will be received at the operation site as a completely assembled, uncharged and unpressurized unit. A tag will be attached which says: "CAUTION This extinguisher is not charged. Follow charging instructions in service manual before putting to use. Remove tag only after extinguisher is properly charged." Special unpacking procedures are not required. When handling the fire extinguisher, observe the normal precautions used when handling equipment to be pressurized and avoid damage that might occur when dropping it.

2-3 New Unit. Cylinder & valve assemblies from the factory have been internally dried and contain dry nitrogen at 5 psig or slightly above. The discharge valve should remain closed until the extinguisher is charged.

2-4 Used Unit. The fire extinguisher will be received at the maintenance site as a completely assembled empty or partially filled, pressurized unit. The unit may or may not be packaged. Unpacking and handling procedures are the same as for a new unit, as applicable.

2-5 PREPARATION FOR OPERATION.

2-6 The fire extinguisher is designed to withstand environmental exposure; therefore, the unit should be stored in a convenient, readily detected location. New units need to be charged with Halon 1211 and nitrogen before they are ready to use. Refer to Service Maintenance paragraph 5-9.

2-7 To ensure used units are ready for operation, visually inspect the pressure gauge and agent level gauge. The pressure gauge should be in the green zone, 200 ± 20 psig range and the pointer in the agent level gauge should indicate agent level at the full mark, 150 pounds.

2-8 Temperature of extinguisher can affect pressure gauge reading and agent level gauge reading. Nominal "properly charged" marking on both gauges is correct for 70°F (21°C). Generally as temperature goes up the two gauge readings go up and conversely low temperature results in low gauge readings.

2-9 The relative pressure gauge vs temperature reading for the Amerex 150 pound Halon wheeled extinguisher is as follows:

2-10 It is best to inspect gauge readings when unit temperature is near 70°F. Tables 2-9, 2-12 are of use in estimating unit pressure and agent fill conditions at other temperatures.

Temperature °F: -40 32 70°F 120 135 Pressure Gauge psig: 127 168 200 263 288 Temperature °C: 140 0 21°C 49 57 2-1

2-11 The Pressure-Temperature Chart is attached to the cylinder top. The minimum psig and maximum gauge read-ings are found directly to the left of where a vertical line from the selected temperature cuts through the two curves.

The gauge reading will be between the minimum and maxi-mum points on a properly charged unit.

Figure 2-1.

2-12 The cylinder contains Halon 1211 agent in mostly liquid form. Agent level gauge uses a float to sense liquid level and position gauge point. Height of liquid agent above the inside bottom of container is as follows:

The liquid level height changes +1.40 in. to -1.25 in. from the nominal 70°F position over the operating temperature range.

2-13 Temperatures of 90°F and above will cause the agent level indicator on a properly charged unit to read well up into the overcharged area. If confirmation of a proper amount of Halon 1211 charge is required, weigh the unit and compare with the gross weight shown on the extinguisher label.

2-14 Temperatures below 40°F will cause the agent level indicator to show below the FULL mark. Units in cold environ-ments may be check weighted or brought inside for warm up to determine a satisfactory agent fill weight.

2-15 Weighing the unit on a scale is the most accurate method to determine if an extinguisher is properly charged.

Temperature -40°F 70°F 122°F 135°F Agent Height 15.22 in. 16.47 in. 17.79 in. 17.86 in.

Temperature -40°C 21°C 50°C 57°C 2-2

SECTION III

THEORY OF OPERATION

3-1 EXTINGUISHING AGENT.

3-2 The extinguishing agent Halon 1211 (BCF) is a halogenated hydrocarbon chemically identified as bromochlorodifluo-romethane. Its chemical symbol is CBrC1F2. Halon 1211 is a colorless, faintly sweet-smelling, electrically nonconductive gas, at ambient conditions having an approximate boiling point of 25°F (-3.4°C) and a freezing point of -256°F (-160°C).

Halon 1211 is a liquified gas under its own vapor pressure in a closed container at ambient temperatures.

3-3 Halon 1211 is a clean, multipurpose fire fighting agent. Effective for Class ABC fires, Halon 1211 extinguishes by chemically interrupting the fire chain reaction, the continuing combination of oxygen, fuel and heat. Halon 1211 does not extinguish by depleting the oxygen supply. Discharged as an 85% liquid/15% vapor stream, Halon 1211 offers long discharge range, which helps the operator to stay at a safe distance while fighting a fire. The liquid/vapor discharge allows Halon 1211 to flow around obstructions when extinguishing tough-to-reach fires.

3-4 Halon 1211 has a low level of toxicity. It has been approved for use in portable fire extinguishers by Underwriters Laboratories in Standard No. 1093 and in local applications by NFPA in Standard No. 12B (1990 edition) and NFPA403 (2003 edition). The Federal Aviation Administration Advisory Circular 20-42B also recommends the use of Halon 1211 portables on commercial aircraft.

Although Halon 1211 vapor has a low toxicity, its decomposition products can be hazardous. On decompo-sition, Halon 1211 has a characteristic sharp, acrid odor, even in concentrations of only a few parts per million. The odor characteristic provides a built-in warning system for the agent and at the same time creates a noxious irritating atmosphere for those who are in the hazard area during and following a fire.

Leave and/or ventilate the area after fighting the fire.

3-5 Physical characteristics of Halon 1211 are indicated in Table 3-1.

TABLE 3-1. HALON 1211 PHYSICAL PROPERTIES

Formula CBrC1F2

Boiling Point 25°F (-3.4°C)

Freezing Point -256°F (-160°C)

Liquid Density 114 lb/ft3 (1830 kg/m3) at 68°F (20°C)

Vapor Pressure 19.6 psig at 68°F (20°C)

Specification MIL-B-38741 Change 6 3-1

3-7 EQUIPMENT OPERATION.

3-8 In a charged extinguisher ready for operation, the extinguishing agent is stored under pressure in the cylinder assembly and retained in the cylinder by the cylinder discharge valve. Operating the cylinder discharge valve lever opens the discharge valve allowing pressurized extinguishing agent to flow from the cylinder via the cylinder syphon tube through the discharge valve to the extinguisher hose and nozzle valve assembly.

3-9 With the nozzle valve closed, the extinguisher nozzle with hose attached can be carried by hand to the fire hazard.

With pressurized extinguishing agent up to the nozzle, opening the nozzle valve will permit agent flow through the nozzle to the fire. Pictographic operating instructions on the extinguisher illustrate how to put it into operation.

3-10 The fire extinguisher includes a pressure gauge and safety outlet. The pressure gauge indicates the cylinder internal pressure. In the eventuality that a high cylinder pressure buildup should occur, the safety outlet is designed to relieve at 400 to 500 psig.

3-2

SECTION IV

OPERATING INSTRUCTIONS

4-1 CONTROLS AND INSTRUMENTS.

4-2 Pressure Gauge. The fire extinguisher, see figure 4-1, includes a pressure gauge. The pressure gauge is used to monitor the cylinder pressure.

4-3 Discharge Valve and Lever. The discharge valve, which includes pressure gauge and safety outlet, is used to retain the agent contents in the cylinder, see figure 4-1. The Discharge Valve includes a hand operated lever that operates the Discharge Valve to allow or stop agent flow from the cylinder to the hose and nozzle valve assembly. The safety outlet relieves pressure at 400 to 500 psig.

4-4 Nozzle Valve and Lever. The nozzle valve is located at the free hose end and is used to retain the agent in the hose, see figure 4-1. The nozzle valve includes a hand operated lever that operates the nozzle valve to allow or stop the discharge of agent through the extinguisher nozzle.

4-5 Nozzle. The nozzle is located on the outlet side of the nozzle valve, see figure 4-1.

4-6 Agent Level Gauge. The agent level gauge provides a visual display of the level of liquified Halon 1211 in the cylinder.

4-7 Pressure Valve. The pressure valve is located on the discharge valve, see figure 4-1. The valve is used during cylinder assembly service recharge.

4-8 OPERATION.

4-9 Pre-Operation Procedure. Transport the fire extinguisher to the fire hazard area and locate the extinguisher within the scope of the 50 foot long hose. At the fire hazard site, position fire extinguisher in vertical position with wheels off ground.

NOTE

The extinguisher may be operated in either the vertical or reclined position. However, the unit in the reclined position will discharge less agent.

4-10 Operation Procedure. Perform unit operation, see figure 4-1, as follows:

Make certain the discharge nozzle is closed (down position) and the extinguisher is upright before begin-ning the following steps.

1. Pull on pin to remove and open tank discharge valve by rotating (pulling) valve lever at top of tank toward the hose 90°. The hose is now pressurized.

2. Pull the nozzle with lever in the CLOSED position from the hose storage mount and extend the hose toward the fire.

Change 6 4-1

3. NOTE: Stand at least 30 feet away from fire before opening the nozzle valve.

Grasp nozzle firmly and aim nozzle at base of fire.

Be prepared for backward reaction (movement) of the nozzle as discharge begins.

4. Hold hose and nozzle firmly to allow for discharge recoil. Open nozzle by pulling handle toward you.

The concentrated agent and the by-products resulting from application to a fire are toxic when inhaled.

After use, leave the area and ventilate well before returning. Symptoms of over-exposure to pure Halon 1211 are: dizziness, impaired coordination, and reduced mental acuity. Persons suffering from over-expo-sure should be immediately removed to fresh air; if unconscious, give respiration and obtain medical help.

Use of adrenaline or similar drugs should be avoided.

5. Sweep agent across base of fire using side to side motion and move to the best positions to extinguish the fire.

6. On the flight line and in open areas not inside of buildings, standby, up wind if possible, to determine if the fire is definitely extinguished. Continue to man the extinguisher until relieved by installation fire protection personnel.

7. In hangers or buildings, immediately evacuate the building and standby outside to provide information to arriving installation fire protection personnel. Ventilation of the building and safe re-entry is an installation fire protection responsibility.

4-11 SHUTDOWN.

Always discharge the Halon residue from the hose when shutting down the extinguisher. Do not use the hose as a storage container as over-pressurization and deterioration of the hose may occur.

4-12 After extinguishing fire, push nozzle lever to CLOSED position to stop agent flow. Stand by to determine if the fire is definitely extinguished. To shutdown extinguisher, rotate discharge valve lever 90° to mechanical stop to close discharge valve. Pull nozzle lever to OPEN position to discharge agent residue from hose. With hose empty, push nozzle lever to CLOSED position. Coil extinguisher hose onto hose bracket and position nozzle into mount and bracket clips, see figure 1-1 and figure 5-5.

4-13 POST FIRE OPERATION.

4-14 Weigh tank to determine amount discharged then transport to storage or maintenance area for service. For detailed Halon temperature-pressure relationships, see paragraph 2-5 through 2-14. Replace seal (figure 7-1-1) and wire (figure 7-1-2) before returning fully charged unit to use.

NOTE

After a discharge of Halon, allow three minutes for the agent level gauge to stabilize before making a final agent level determination.

4-2 Change 6

Figure 4-1. 150 lb. Wheeled, Liquified Gas, Fire Extinguisher Change 12 4-3

4-15 Halon 1211 evaporates rapidly. Therefore, no cleanup is required unless moisture or a high temperature was present at the area of application. However, ventilation should always be provided to remove the vapors. If moisture or a high temperature was present, use the following clean-up procedures:

a. After fire has been extinguished, purge area and surface with clean dry air (dust free low moisture content compressed air).

b. Wash contaminated surface with a ten percent solution of Sodium Bicarbonate, Specification O-S-576 or one part MIL- C-87936, Type I to three parts water. Apply solution with a brush or rag. Allow solution to remain on surface until all bubbling stops. Remove solution by wiping with a damp sponge or cloth, rinsing with water.

4-4

SECTION V

INSPECTION, MAINTENANCE, RECHARGING, AND

TESTING

5-1 GENERAL.

5-2 The 150 pound, wheeled, liquified gas, fire extinguisher requires ordinary care to ensure reliable operation at all times.

Maintenance, servicing, and recharging shall be performed by trained persons having available the appropriate servicing manual(s), the proper types of tools, recharge materials, lubricants, and manufacturer's recommended replacement parts. If maintenance is to be performed by contract, the contractor must perform all maintenance and inspections using this technical manual (TO 13F4-4-121). The owning unit must ensure that the contractor is provided a current copy of this manual or ensure that they are on distribution in accordance with TO 00-5-1.

5-3 The extinguisher requires ordinary monthly inspection. Inspection is a "quick check" that an extinguisher is available and will operate. It is intended to give reasonable assurance that the extinguisher is fully charged and operable. This is done by seeing that it is in its designated place, that it has not been actuated or tampered with, and that there is no obvious physical damage or condition to prevent operation. Refer to paragraph 5-7 for detailed information.

5-4 Service maintenance should be performed yearly, after any use of the extinguisher, or when visual inspection reveals the need for service. Service maintenance is a "thorough check" of the extinguisher. It is intended to give maximum assurance that an extinguisher will operate effectively and safely. It includes a thorough examination and any necessary repair or replacement. Refer to paragraph 5-9 for detailed information.

5-5 Every six years extinguisher shall be emptied and subjected to the applicable complete maintenance procedures. When the applicable maintenance procedures are performed during periodic recharging, the six year requirement shall begin from that date. Refer to paragraph 5-12 for detailed information.

5-6 When the date of the cylinder reaches 12 years, the owning unit must make an economical decision to have the cylinder and discharge hose hydrostatically proof pressure tested in conjunction with a six year complete maintenance or dispose of the fire extinguisher in accordance with paragraph 6-3.

5-6.1 Considerations for an economical decision should include the following cost factors:

a. Six year complete maintenance/inspection.

b. All scheduled replacement parts and obvious unscheduled unserviceable parts.

c. Hydrostatic proof pressure test of the cylinder and discharge hose (see paragraph 5-29).

d. Shipping and handling.

e. If the fire extinguisher needs refurbishment (see paragraph 5-31).

5.6.2 Hydrostatically proof testing must be completed in accordance with NFPA (National Fire Protection Association) standard 10 and CGA (Compressed Gas Association) Pamphlet C-6. Refer to paragraph 5-29 for additional information and complete details on hydrostatic proof testing. The following website is provided in aiding users in locating authorized cylinder test facilities: http://www.phmsa.dot.gov/hazmat/regs/spa/approvals/cylinders (see authorized DOT cylinder requali-fiers).

NOTE

Shipping pressurized fire bottles after they have exceeded the 12-year point (without a hydrostatic test) is against department of transportation regulations. Plan accordingly.

5-7 INSPECTION.

5-8 Inspection is a "quick check" that an extinguisher is available and will operate. It is intended to give reasonable assurance that the extinguisher is fully charged and operable. Inspect the Hydrostatic/6 year maintenance label during quick inspection. An overdue 6 year maintenance/hydrostatic could result in an unserviceable fire extinguisher. Fire extinguisher inspection should include the following:

Change 12 5-1

a. Location:

(1) Check for free and easy access to and egress of fire extinguisher.

(2) Inspect location for cleanliness and obstructions.

b. Fire Extinguisher Gauges.

(1) Inspect fire extinguisher to ensure pressure gauge is not damaged and the indicator is in the green zone, 200 ± 20 psig at 70°F ambient temperature. See Figure 2-1 for Pressure-Temperature Correction Chart.

NOTE

The agent level gauges are now obsolete and no longer procurable. This may be removed if the agent level gauge is no longer working properly and maintenance information in paragraph 5-20 does not correct the problem.

(2) Inspect to ensure that agent level gauge is on the full mark at 70°F ambient temperature.

c. Hose Support.

Inspect hose support and mounting hardware to ensure they are securely tightened and not damaged.

d. Cylinder Assembly.

(1) Examine for obvious physical damage, corrosion, or leakage. Pay particular attention to the area of the welds and fittings. There must be no weld cracks. Fittings and mounting hardware must be securely fastened.

(2) Ensure that operating instructions on nameplate are legible.

e. Safety Outlet.

Only tighten the large hex nut of the assembly. The small hex nut containing the safety exhaust holes is factory set to a torque value.

Inspect safety outlet for leakage, tightness, and damage.

f. Discharge Valve.

(1) Check discharge valve for leakage, tightness, and damage. There must be no leakage or damage and all parts must be connected securely.

(2) Ensure that seals and tamper indicators are not broken or missing.

g. Hose.

Inspect hose for abrasions, cuts, deterioration, and proper installation. The hose must be free of defects. Ensure that hose end fittings are securely fastened. For information on how to coil the hose on the hose support, refer to Figure 5-1.

h. Nozzle Valve Assembly.

(1) Check nozzle valve assembly is securely attached to the hose.

(2) Check nozzle hole is clean and free of obstructions.

(3) Check nozzle lever moves smoothly and with ease by operating lever from close to open position several times.

Ensure lever is in closed position.

(4) For nozzle valve assembly, part No. 05295, ensure that nozzle tip is fully seated against the shut-off lever and body assembly.

i. Tires and Wheels.

(1) Check tires are not worn or damaged.

(2) Check wheels are properly secured and rotate freely.

5-2 Change 12

j. Carriage.

(1) Check welds are in good condition.

(2) Check carriage frame is not distorted or damaged.

(3) Ensure reflective materials are in place, in good condition and meet specifications (See Figure 5-7). Replace as required.

5-9 SERVICE MAINTENANCE. (AGENT REMOVAL IS NOT REQUIRED.)

NOTE

Maintenance, servicing and recharging shall be performed by trained persons having available the appropri-ate servicing manual(s), the proper types of tools, recharge materials, lubricants and manufacturer’s recom-mended replacement parts or parts specifically listed for use in the fire extinguisher.

5-10 At least once a year (or more frequently, if indicated by an inspection), service maintenance should be performed.

Service maintenance is a “thorough check” of the extinguisher. It is intended to give maximum assurance that an extinguisher will operate effectively and safely. It includes a thorough examination and any necessary repair or replacement.

5-11 Service maintenance should include the inspection procedures in paragraph 5-8 plus the following:

NOTE

Avoid use of solvents around the pressure gauge when cleaning. They could seriously damage the plastic gauge face.

a. Clean extinguisher to remove dirt, grease, or foreign material. Inspect the cylinder for corrosion, abrasion, dents, and condition of welded seams. If damage is found and doubt exists to the integrity of the cylinder, it must be hydrostati-cally proof pressure tested (if economical) or disposed of in accordance with paragraph 6.3. Refer to paragraph 5-29 if hydrostatic proof pressure testing is needed.

b. Weigh extinguisher. Total charged weight of a full extinguisher is 325 pounds ± 15 pounds. Recharge extinguisher, if necessary, refer to paragraph 5-26.

c. Check the date of manufacture printed on the extinguisher label (nameplate) or on the agent cylinder dome/cylinder carriage flange. The cylinder must be hydrostatically proof pressure tested every 12 years or disposed of in accordance with paragraph 6-3. Also, the discharge hose must have a hydrostatic proof pressure test every 12 years (concurrently with the cylinder’s hydrostatic proof pressure test).

d. Extinguishers may have been placed in service without a means to secure the pull pin to the extinguisher. These pull pins should be replaced with a pull pin and lanyard assembly, Part Number 06100, refer to Figure 7-5. This assembly consists of a pull pin, 16-gauge copper wire inside a plastic sheath, and two copper ferrules. One end of the wire is to be attached to the pull pin; the other end should be wrapped around the extinguisher and secured by crimping the ferrule. Inspect pull pin for freedom of movement and ensure that it is properly secured. Replace pull pin assembly as necessary.

e. Remove hose assembly. Inspect gaskets, couplings, and hose for damage or deterioration replace as necessary. Blow air through hose and nozzle to ensure passage is clear of foreign material.

Only tighten the large hex nut of the assembly. The small hex nut containing the safety exhaust holes is factory set to a torque valve.

f. Inspect discharge valve assembly for corrosion or damage to hose thread connection. Replace or repair valve assembly, as necessary, following proper depressurization and recharge procedures. Visually inspect the safety disc assembly on the discharge valve for obstructions or damage. If necessary, replace with Part Number 03787.

Change 12 5-3

g. Inspect wheels and tires. Check that tires are not worn or damaged. Inspect wheels to ensure that they are properly secured, greased, and rotate freely. Lubricate, if necessary, with grease in accordance with MIL-G-10924 to grease fittings.

h. Check carriage assembly and hose rack assembly for loose nuts and bolts, frame distortion or damage. Check welds for damage or corrosion. Repair or replace as necessary.

NOTE

When assembling hose to discharge valve or nozzle, tighten hose 1/4 turn after contacting the hose gasket.

i. Reinstall hose and nozzle assembly. Refer to Figure 5-1 for details on how to coil hose on the extinguisher.

j. Install new tamper seal and record the service date on the extinguisher tag.

5-12 COMPLETE MAINTENANCE. (SIX YEAR TEARDOWN WHICH REQUIRES REMOVAL OF AGENT.)

5-13 Every six years the extinguisher shall be emptied and subjected to complete maintenance procedures. Once the complete maintenance procedures have been performed, the next six year complete maintenance requirement shall begin from that date.

Before attempting to devalve the extinguisher, be sure that it is completely depressurized. Never have any part of your body over the extinguisher while removing the valve assembly.

Halon 1211 should not be mixed with even the slightest amount of moisture. Prolonged exposure of a devalved cylinder to ambient air should be avoided to prevent moisture contamination.

NOTE

Halon agent removed from an extinguisher at the time of maintenance or recharging shall be placed in a separate recovery cylinder and the extinguisher cylinder examined internally for contamination. The Halon agent, retained in the recovery cylinder, may be reused only if no evidence of internal contamination is observed in the extinguisher cylinder. Halon removed from extinguishers that exhibit evidence of internal contamination or corrosion shall be processed in accordance with the extinguisher manufacturer's instruc-tions.

5-14 Once the extinguisher has been depressurized and Halon 1211 has been removed, perform complete maintenance procedures.

5-4 Change 12

a. Empty extinguisher of all pressure and chemical, using a Halon Recharge/Recovery system and Halon bulk supply cylinder with sufficient empty capacity to accept the contents of the extinguisher.

b. Remove discharge valve assembly and disassemble by removing downtube, spring and valve stem assembly. Remove and discard collar O-ring, pressure valve and cap assembly, pressure gauge, and safety outlet.

NOTE

It is necessary to keep the cylinder opening covered to minimize interior corrosion.

c. Thoroughly clean all parts of the disassembled valve with a soft bristle brush or soft cloth and perform the following steps:

(1) Blow valve out with dry nitrogen.

(2) Replace collar O-ring with new Amerex O-ring.

(3) Replace pressure valve and cap assembly with new assembly using Teflon Tape (A-A-58092).

(4) Replace the valve stem assembly with proper Amerex assembly.

(5) Replace pressure gauge with new gauge using Teflon Tape (A-A-58092).

(6) Replace safety outlet with new safety outlet using Teflon Tape (A-A-58092).

(7) Lightly lubricate the collar O-ring and valve stem O-ring (NOT THE VALVE STEM SEAL) with Parker Super “O” Lube or equivalent.

d. Reassemble valve assembly and set aside.

e. Inspect the cylinder interior following the Compressed Gas Association Visual Inspection Standard, Pamphlet C-6.

NOTE

If any moisture is evident or a hydrostat testing has been accomplished, purge with hot air and oven dry the cylinder at 130°F to 160°F until thoroughly dry. Always inspect cylinder interior for moisture immediately before assembly of the extinguisher.

f. Clean the cylinder O-ring seating groove in the cylinder neck. If any rust is evident, remove by using a fine emery cloth (200 grit). Clean surface and lubricate the entire sealing area with a thin film of Parker Super “O” Lube. Install the valve assembly.

g. Remove all ambient air from cylinder. If a vacuum purge system is not available, purge the residual air from the cylinder by pressurizing the extinguisher to 90 psi with dry nitrogen (minimum dew point of -70°F). The regulator gauge should be used to determine the pressure. Check for leaks while pressurized, then expel the pressure and close the valve.

h. Recharge extinguisher (refer to paragraph 5-26).

5-15 CORRECTIVE MAINTENANCE.

5-16 Corrective maintenance is performed as required to correct a fire extinguisher malfunction determined during the periodic inspection checks and service leakage test. WHEN ASSEMBLING TAPERED THREAD FITTINGS, ASSEM-

BLE WITH ONE TO TWO LAYERS OF TEFLON TAPE (A-A-58092).

All corrective maintenance procedures must be performed with component being replaced isolated from and free of agent or pressure. Observe all precautions applicable to working on pressurized equipment and Halon agents to prevent damage to equipment or injury to personnel. Before attempting to devalve the extinguisher, be sure that it is completely depressurized.

Change 12 5-5

5-17 NOZZLE VALVE ASSEMBLY PART NUMBER 05011. (REFER TO FIGURE 7-2).

NOTE

The original style nozzle valve assembly Part Number 05011 is now obsolete. If repair instructions are not successful to correct a problem, entire nozzle valve assembly shall be replaced with ball valve with nozzle assembly Part Number 05295. Refer to Figure 7-4 for illustration of new style valve assembly.

a. Remove.

(1) Check, discharge valve must be CLOSED.

(2) Remove nozzle valve assembly from clips and mount.

(3) While holding nozzle valve firmly, slowly open valve to relieve any pressure.

(4) Unscrew and remove nozzle valve assembly from hose.

(5) Remove gasket from nozzle. Inspect gasket for cuts or abrasions. Replace gasket, if necessary.

b. Disassembly.

(1) Remove gasket (13) from swivel (9).

NOTE

Most seal O-rings may be readily removed from cylindrical components by squeezing firmly with thumb and forefinger across the assembly diameter, then, while exerting continuing pressure, force the fingers up and around the assembly diameter. This will cause the O-ring to bunch and rise out of the groove permitting it to be grasped and removed. Do not use a sharp pointed instrument to remove O-rings as damage to the sealing surfaces and O-ring will result.

(2) Remove set screw (12) and 18 each balls (11) from body (1). Remove swivel (9). Remove seal O-ring (10) from swivel (9).

(3) Remove nozzle (6) from body (1) by unscrewing nozzle (6) counterclockwise. Remove seal O-ring (8) and seal nozzle (7) from body (1) .

(4) Remove screws (5) from lever (4). Slide lever (4) up and free of body (1).

NOTE

If a mounted seal O-ring is pushed past a cross hole in a bore the seal will be damaged. Do not push plug

(2) through and out of bore in body (1).

(5) Carefully push face of plug (2) out of body (1) use enough to expose O-ring (3). Remove exposed seal O-ring (3).

Push plug (2) backwards through and out of body (1). Remove seal O-ring (3) from plug.

5-6

c. Clean.

MIL-PRF-680, Type II or Type III is toxic to skin, eyes and respiratory tract. Skin and eye protection required. Avoid repeated or prolonged contact. Good general ventilation normally adequate. Compressed air used for cleaning can create airborne particle that may enter the eyes. Pressure will not exceed 30 psig.

Eye protection required.

(1) Clean metallic parts in dry cleaning solvent per specification MIL-PRF-680, Type II or Type III and air dry using 20 to 30 psig clean, dry, compressed air.

(2) Wipe nonmetallic parts with clean, dry, lint free cloth or wash in soapy water, rinse in clean water and dry with compressed air.

d. Inspect/Check.

(1) Inspect threaded areas for defective threads.

(2) Inspect sealing surfaces for nicks, scratches or deformation.

(3) Inspect all parts for cracks, gouges, dents, distortion or damage.

e. Repair/Replace.

(1) Repair of detail parts is not recommended.

(2) Replace gasket (13), seal O-rings (8), (10), 2 each seal O-ring (3), and seal teflon (7).

(3) If any part other than gasket and seals requires replacement, replace complete nozzle assembly.

f. Assembly.

Extinguishers subject to low temperatures should be lubricated with Parker Super “O” Lube. Use of improper lubricant may cause nozzle valve assembly to freeze up which leads to failure or difficulty of the valve to open.

NOTE

Lubricate all seals and sliding surfaces with lubricant (14): Acceptable lubricant for service temperatures of -65°F to +400°F is Parker Super “O” Lube, Part Number 884-2, Parker Hannifin Corp., FSCM 02697.

Acceptable lubricant for service temperatures of -40°F to +400°F is either Part Number V-711, Visilox Systems Inc., FSCM 069C6 or Part Number G-611, General Electric Company, FSCM 00CE9 or equiva-lent.

(1) Position lubricated plug (2) in body (1) so that the cross hole small end and large end and the holes for screws (5) are in the position shown in Figure 7-2.

Change 10 5-7

(2) Push face of plug (2) 1/4 to 3/8 inches out from face of body (1) and install one lubricated seal O-ring (3). Carefully push seal O-ring (3) with plug (2) into body (1) so that opposite face of plug (2) protrudes just far enough to expose O-ring groove from face of body (1). Install second lubricated seal O-ring (3) on plug (2). Push plug (2) into body

(1) so that both faces are flush with body (1).

(3) Slide lever (4) over plug (2) and position as shown in Figure 7-2. Install 2 each screws (5) through lever (4) and plug (2) and tighten firmly. Pull lever (4) to open position as shown in Figure 7-2 and check to see that large end of hole in plug (2) is facing toward swivel end of body (1).

Do not overtighten the nozzle tip (6) when reinstalling it into the body (1) as this can cause interference with the ball valve.

(4) Turn body (1) so that threaded boss for nozzle (6) is facing up. Assemble lubricated seal O-ring (8) to shoulder of seal "teflon" (7). Insert seal assembly (8) (7) into body (1) and against plug (2). Seal O-ring will still be visible after assembly. While maintaining the position of valve body (1) thread nozzle (6) into body (1) until nozzle (6) is firmly seated against body (1).

(5) Assemble lubricated seal O-ring (10) onto swivel (9), then insert swivel - seal assembly into body (1). Rotate body

(1) so that entry hole for ball (11) is up. Insert lubricant and 18 each balls (11) into body (1). Put a small amount of Teflon tape or non-hardening automotive gasket cement on thread of set screw (12) and assemble to body (1). Top of set screw should be flush to one turn below flush with body (1) surface. While trying to pull swivel (9) from body (1), rotate swivel (9) to check for freedom of movement. If necessary, adjust set screw to ensure freedom of movement.

(6) Insert gasket (13) into swivel (9).

g. Test.

(1) The lever should move reliably between fully closed to fully open.

(2) Check for leakage and valve shut off prior to assembling to an extinguisher.

h. Replace.

(1) Assemble nozzle valve assembly to hose and tighten 1/4 turn beyond zero clearance. Cycle nozzle valve lever several times to ensure smooth operation and leave in CLOSE position.

(2) Position nozzle valve assembly nozzle down, on mount and in clips.

5-18 DISCHARGE VALVE ASSEMBLY. (REFER TO FIGURE 7-3.)

NOTE

The cylinder assembly must be empty of Halon and unpressurized before discharge valve removal is attempted.

5-8

a. Remove from cylinder assembly.

(1) Remove hose from discharge valve. Reference paragraph 5-21.a.3.

(2) Open discharge valve slowly to ensure the cylinder assembly is empty and unpressurized.

(3) Unscrew and remove discharge valve from cylinder assembly.

(4) Inspect O-ring for cuts and abrasions. Replace, if necessary.

(5) Inspect sealing surfaces for nicks, scratches, and contamination. Repair or replace, as necessary.

b. Disassembly.

NOTE

Most seal O-rings may be readily removed from cylindrical components by squeezing firmly with thumb and forefinger across the assembly diameter, then, while exerting continuing pressure force the fingers up and…