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Repair Kits Available By Part Number Section 2 Page - GAMECO

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WARNING: Installation, disassembly, repair and maintenance<br />

must be performed only by qualified personnel.<br />

All gas should be evacuated from the system before starting<br />

repairs. Emergency service may be carried out with gas in the<br />

container but only under the same conditions required for<br />

releasing LP-Gas (see caution below).<br />

Installation, usage and maintenance of this product must be in<br />

compliance with all Engineered Controls International, Inc.<br />

instructions as well as requirements and provisions of NFPA<br />

#54, NFPA #58, DOT, ANSI, all applicable federal, state, provincial<br />

and local standards, codes, regulations, and laws.<br />

Inspection and maintenance on a periodic basis is essential.<br />

Be sure all instructions are read and understood before installation,<br />

operation and maintenance. These instructions must be<br />

passed along to the end user of the product.<br />

CAUTION: Contact or inhalation of liquid propane, ammonia<br />

and their vapors can cause serious injury or death! NH3 and LP-<br />

Gas must be released outdoors in air currents that will insure<br />

dispersion to prevent exposure to people and livestock. LP-<br />

Gas must be kept far enough from any open flame or other<br />

source of ignition to prevent fire or explosion! LP-Gas is<br />

heavier than air and may not disperse or evaporate rapidly if<br />

released in still air.<br />

Disassembly & <strong>Repair</strong> Procedure<br />

CAUTION: READ THROUGH ALL OF THESE INSTRUCTIONS, IN-<br />

CLUDING THE NOTICE AND WARNINGS ON THE BACK OF THIS<br />

SHEET, BEFORE BEGINNING ANY DISASSEMBLY OR REPAIR.<br />

NOTE: <strong>Repair</strong>s must be performed in a clean area. Hands, clothing,<br />

tools and work area must be completely free of oil, grease and foreign<br />

matter to prevent contamination of component parts and valves.<br />

8475-81A Kit for<br />

7556V, 8475, G8475, 8477<br />

and 8593 Series Multivalves<br />

A. Disassembly<br />

1. Remove cap and save for reassembly.<br />

If the valve is repaired with gas in the container (emergency<br />

service):<br />

2. Place a vapor return coupling (part number 3171) on vapor<br />

valve. Stand aside and tighten onto 1 1 /4" ACME threads to close<br />

the internal excess flow valve. Leave coupling in place. Continue<br />

with steps A3-A5 and B1-B9.<br />

If the valve is repaired with all gas evacuated from the container:<br />

3. Remove the vapor return body (7556B-3) by turning counterclockwise,<br />

using a 1 5 /16" wrench with a handle of sufficient length to<br />

develop at least 1000 in/lbs torque. Save for reassembly.<br />

4. Remove and discard stem & seat disc assembly (7556B-8),<br />

spring (7573-10) and gasket (2418-31) from MultiValve body,<br />

using care to keep from scratching gasket seal area.<br />

5. Inspect MultiValve body and clean if necessary, be sure that interior<br />

and gasket seal area are free of dirt, residue and foreign particles.<br />

B. Reassembly<br />

1. Position new gasket (2418-31) in MultiValve body.<br />

2. Place new spring over guide in MultiValve body as shown.<br />

3. Insert new stem & seat disc assembly into spring.<br />

4. Apply one 1 /8" stripe of a high strength thread locking compound<br />

on threads of vapor return body.<br />

NOTE: Thread locking compound must not contact seat disc<br />

or gasket.<br />

5. Press seat disc retainer into guide in MultiValve body and hold<br />

in position with the eraser end of a pencil. Place vapor return<br />

body over pencil and thread into lower body, tighten to 700 in/<br />

lbs torque with a suitable wrench.<br />

CAUTION: Unless seat disc retainer is held in guide during<br />

assembly, internal parts of valve may be damaged and threads<br />

of vapor return body and MultiValve body will not engage<br />

properly.<br />

6. Depress and release seat disc & retainer assembly a few times,<br />

if freedom of movement or proper seating is not possible,<br />

disassemble and repeat steps B-2 through B-6.<br />

7. Install new gasket (2797-20) in upper body.<br />

8. Re-install valve and/or pressurize tank, check valve for proper<br />

operation and check all seal points for leaks by applying a leak<br />

detection solution.<br />

9. Replace vapor return cap.<br />

* 2797-20 Gasket<br />

7556V<br />

* 7556B-8 Stem &<br />

Seat Disc Assembly<br />

7556B-3 Body<br />

(Vapor Return)<br />

* 2418-31 Gasket<br />

* These items are included in the 8475-81A<br />

Assembly recommended for most repairs.<br />

* 7573-10 Spring

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