LPG ON-BOARD FUEL STORAGE AND DELIVERY SYSTEMS *

For every task in LPG On-Board Fuels Storage and Delivery Systems, the following safety requirement must be strictly enforced: Comply with personal and environmental safety practices associated with clothing; eye protection; hand tools; power equipment; proper ventilation; and the handling, storage, and disposal of chemicals/materials in accordance with local, state, and federal safety and environmental regulations.

XII. LPG ON-BOARD FUEL STORAGE AND DELIVERY SYSTEMS

A. DIAGNOSIS AND REPAIR

1. Interpret and verify complaint; establish a strategy for diagnosis and repair. P-1

2. Identify and inspect filler valve assembly; verify operation of automatic stop-fill valve(s) (where applicable); service as needed. P-1

3. Identify and inspect fixed liquid level gauge; service as needed. P-1

4. Identify and inspect manual shut-off valve, excess flow valve, and liquid service valve; service as needed. P-1

5. Identify and inspect in-line hydrostatic relief valve(s); service as needed. P-1

6. Identify and inspect internal pressure relief valves; service as needed. P-1

7. Identify and inspect pressure regulator(s); service as needed. P-1

8. Identify, test, and inspect liquid pump, components, and check pressure differential; service as needed. P-2

9. Identify and inspect converter/regulator (heat exchanger); service as needed. P-1

10. Diagnose incorrect converter/regulator (heat exchanger) operation. Check coolant flow, coolant routing , and for evidence of LPG leaks in coolant system; service as needed. P-1

11. Inspect fuel supply container(s) and appurtenances for fuel leaks, service as needed. P-1

12. De-fuel fuel system using industry practices or manufacturer's procedures following all local, state, and federal regulations. (Local procedures may vary and extreme care must be exercised if using actual fuel. Use of inert gas or shop air is recommended for practicing this task in the classroom.) P-2

13. Remove and replace LPG fuel supply container. P-3

14. Prepare LPG fuel supply container for inactivity and/or shipping. P-2

15. Disable fuel delivery and isolate components of the fuel system. P-1

16. Check pressurized fuel system for leaks; service as needed. P-1

17. Inspect all connections, fittings, hoses and tubing for damage, chaffing, leaks, routing, shielding, and mounting; service as needed. P-1

18. Check fuel system operating pressures. P-1

19. Diagnose the cause of abnormal fuel delivery. P-1

20. Diagnose the cause of inaccurate fuel level indicator reading. Differentiate between fuel supply container sender and fuel gauge malfunctions; service as needed. P-2

21. Test on-board propane leak detection system, verify operation; service as needed (service may require special training and certification). P-3

22. Inspect on-board fire suppression system, verify readiness; repair or replace as needed (service may require special training and certification). P-3

23. Identify and test fuel lock-off and associated components; service as needed. P-1

XII. LPG ON-BOARD FUEL STORAGE AND DELIVERY SYSTEMS B. MAINTENANCE

1. Inspect fuel supply container(s) and related hardware for chaffing and damage (includes brackets, shielding, fasteners and supply vent system). Visually inspect data plate and labels according to applicable regulations. P-1

2. Identify and inspect filler valve assembly; verify operation of automatic stop-fill valve(s) (where applicable); service as needed. P-1

3. Identify and inspect fixed liquid level gauge; perform necessary maintenance. P-1

4. Identify and inspect manual shut-off valve; perform necessary maintenance. P-1

5. Identify and inspect fuel lock-off valve; perform necessary maintenance. P-1

6. Identify and inspect converter/regulator (heat exchanger); perform necessary LPG and coolant system maintenance. P-1

7. Identify and inspect in-line hydrostatic relief valve(s); perform necessary maintenance. P-1

8. Identify and inspect internal pressure relief valve; perform necessary maintenance. P-1

9. Identify and inspect liquid pump system; perform necessary maintenance. P-2

10. Operate/read portable leak detector. P-1

11. Inspect fuel system for leaks. P-1

12. Perform safe fueling procedures and determine fuel level. P-2

13. Test on-board propane leak detection system, verify operation; service as needed (service may require special training and certification). P-3

14. Inspect on-board fire suppression system, verify readiness; repair or replace as needed (service may require special training and certification). P-3

15. Close manual shut-off valve, de-pressurize fuel delivery system, service fuel filter elements and inspect for debris. P-1

16. Document findings and any abnormal or unsafe conditions identified during maintenance procedures. P-1