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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 be in<br />

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

as well as requirements and provisions of NFPA #54, NFPA<br />

#58, DOT, ANSI, all applicable federal, state, provincial and local<br />

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 and<br />

their vapors can cause serious injury or death! NH 3<br />

and LP-Gas<br />

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

to prevent exposure to people and livestock. LP-Gas must be kept<br />

far enough from any open flame or other source of ignition to<br />

prevent fire or explosion! LP-Gas is heavier than air and may not<br />

disperse or evaporate rapidly if released in still air.<br />

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

NOTE: Maintenance may be performed with the valve installed or with<br />

valve removed from the line. In either case, the gas supply must be<br />

isolated from the line by closing a separate shut-off valve. Before starting<br />

repairs, open handwheel as far as it will go.<br />

CAUTION: Do not apply force after valve is fully open.<br />

A. Disassembly<br />

1. Using a 15 /16" wrench with a handle of sufficient length to develop<br />

1250 in/lbs torque, remove four nuts from the bonnet by turning<br />

counterclockwise and lift bonnet away from the valve body.<br />

2. Remove body gasket and discard.<br />

TO INSTALL NEW SEAT DISC:<br />

3. Clamp the square section of bonnet in a vise.<br />

4. While holding the hex section of the seat disc retainer with a wrench,<br />

use another wrench to remove the jam nut.<br />

5. Remove seat disc retainer washer and save for reassembly, take out<br />

and discard seat disc.<br />

A7515-50 Assembly for<br />

A7515AP, A7516AP, A7517AP,<br />

A7517FP, A7518AP and<br />

A7518FP Shut-Off Valves<br />

6. Soak new seat disc (A7515-4) in water prior to installation.<br />

7. Press seat disc into recess of seat disc retainer.<br />

8. Place disc retainer washer over threaded portion of seat disc<br />

retainer.<br />

9. Apply Loctite cement (5555LT271) to the first three threads of<br />

retainer.<br />

CAUTION: Do not allow Loctite to contact seat disc.<br />

10. Thread on jam nut and tighten with a wrench until seat disc is fully<br />

compressed against lip of seat disc retainer, about 300 in/lbs.<br />

torque is required.<br />

11. Stake nut in two places at retainer thread to prevent loosening. See<br />

figure 2.<br />

Note: If no further repairs are required, disregard steps A-12 through A-<br />

17 and B-1 through B-9 of the instructions. Finish reassembly by<br />

following steps B-10 through B-14 only. TO INSTALL ALL OF THE<br />

A7515-50 REPAIR PARTS, FOLLOW ALL OF THE REMAINING IN-<br />

STRUCTIONS.<br />

12. Remove handwheel locknut by turning counterclockwise with a<br />

small wrench to allow removal of washer and handwheel.<br />

13. Using a 1 5 /8" wrench with a handle of sufficient length to develop at<br />

least 2000 in/lbs. torque, turn seal housing counterclockwise and<br />

carefully remove from bonnet.<br />

CAUTION: Do not mar finish of stem.<br />

14 Remove and discard pressure seal rings and O-ring from seal<br />

housing. Clean old cement residue from seal housing threads with<br />

a wire brush and make sure interior is free of dirt and foreign<br />

particles.<br />

Figure 1-<br />

A7515AP<br />

A7515-13 Locknut<br />

A7515-37 Washer<br />

A7515-15B Handwheel<br />

* A7515-25 O-Ring<br />

A7515-19 Seal Housing<br />

* A7515-42 Pressure Seal Ring (3)<br />

* A7515-9 Jam Ring<br />

A7515-10 Gasket<br />

* A7515-21 Washer<br />

A7515-17 Spring<br />

A7515-14 Stem<br />

A7515-2 Bonnet<br />

A7515-43 Stud (4)<br />

A7515-18 Nut (4)<br />

* A7515-8 Gasket<br />

A7515-26 Seat Disc<br />

A7515-12 Stem Holder<br />

A7515-16 Stem Retainer (2)<br />

* 7188-10 Roll Pin (2)<br />

A7515-5 Seat Disc & Retainer Assembly<br />

* A7515-4 Seat Disc<br />

Body<br />

A985B Plug (Not Illustrated)<br />

** 5555GS-3 Grease<br />

** 5555LT271 Loctite Cement<br />

** 5555PL Litharge Cement<br />

Figure 2 – A7515-5<br />

Seat Disc & Retainer Assembly<br />

Seat Disc Retainer<br />

A7515-4 Seat Disc<br />

Seat Disc Retainer Washer<br />

Jam Nut<br />

stake here<br />

* These items are included in the A7515-50<br />

assembly recommended for most repairs.<br />

** Must be ordered separately from Engineered<br />

Controls International, Inc.

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