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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 MUST be evacuated from the system before starting<br />

repairs.<br />

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

be in compliance with all Engineered Controls International,<br />

Inc. instructions as well as requirements and provisions of<br />

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

state, provincial and local standards, codes, regulations<br />

and laws.<br />

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

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

installation, operation and maintenance. These instructions<br />

must be 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<br />

and LP-Gas must be released outdoors in air currents that<br />

will insure dispersion to prevent exposure to people and<br />

livestock. LP-Gas must be kept far enough from any open<br />

flame or other source of ignition to prevent fire or explosion!<br />

LP -Gas is heavier than air and may not disperse or evaporate<br />

rapidly if released in still air.<br />

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

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

INCLUDING THE NOTICE AND WARNINGS ON THE BACK OF<br />

THIS SHEET, BEFORE BEGINNING ANY DISASSEMBLY OR<br />

REPAIR.<br />

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

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

grease and foreign matter to prevent contamination of component<br />

parts and valves.<br />

A. Disassembly<br />

1. EVACUATE ALL GAS FROM THE SYSTEM BEFORE ANY<br />

DISASSEMBLY REPAIR. Open valve by lifting lever to<br />

vertical position to release any gas remaining in the system.<br />

2. Completely remove valve from line and clamp in vise.<br />

3. Move lever to horizontal (valve closed) position.<br />

4. Remove roll pin and lever and save for reassembly.<br />

7901T-80 <strong>Repair</strong> Kit for 7901<br />

Series Quick Acting Valves<br />

5. Using a 11 /16" wrench on hex section of bonnet assembly,<br />

remove by turning counterclockwise.<br />

6. Carefully remove seat retainer, stem assembly and spring<br />

from bottom of bonnet. Save spring for reassembly.<br />

7. Remove seat retainer from stem assembly. Discard seat<br />

retainer. Save stem for reassembly.<br />

9. Remove and discard gasket from body.<br />

10. Inspect inside of valve body. Clean if necessary.<br />

CAUTION: do not scratch or mar seat area.<br />

B. Reassembly<br />

1. Place new O-ring into grove of bonnet assembly.<br />

2. Place new seat retainer on stem.<br />

3. Reposition spring as shown in diagram.<br />

4. Carefully install new seat retainer and stem assembly through<br />

spring and bottom of bonnet.<br />

5. Inspect to insure washer has remained in position as shown<br />

in diagram.<br />

6. Replace lever in horizontal position. Align holes. Replace<br />

roll pin with small hammer. (Install slot of pin towards<br />

bonnet).<br />

7. Push lever to vertical (valve open) position.<br />

8. Place new gasket into grove in valve body as shown in<br />

diagram.<br />

9. Thread bonnet assembly into body by turning clockwise.<br />

Using a 11 /16" wrench, tighten to 1500 in/lbs. torque.<br />

10. Move lever to horizontal position (valve closed) position and<br />

replace valve in line.<br />

11. Pressurize line. Check valve for proper operation.<br />

12. Check all seal points for leaks by applying a suitable leak<br />

detection solution.<br />

Lever<br />

7901T-80<br />

Roll Pin<br />

Groove<br />

Washer<br />

Bonnet<br />

* Gasket<br />

* O-Ring<br />

Stem<br />

Spring<br />

* Seat Retainer Assembly<br />

Body

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