2018 FORD F-150 5.0L COMPRESSED NATURAL GAS CONVERSION SYSTEM INSTALLATION INSTRUCTIONS
2018 F-150 5.0L INSTALLATION MANUAL
Page 38
LEAK CHECKING THE SYSTEM
After the Altech-Eco CNG system has been installed on the vehicle, all coolant hoses and connections, all gasoline and CNG connections, gasoline and
CNG fuel rails and injectors must be checked for leaks. Also, check the overall installation of wiring, zip ties and other components to make sure they are
not loose or hanging.
Tools:
• Combustible Gas Leak Detector TPI 721 (Davis Instruments)
• Soapy Water Solution or Liquid Leak Check Solution
1. Double check and verify wiring is correct and secure with nothing hanging loose. Check that zip ties are snipped properly to avoid potential injury.
2. Check and verify that all installed hoses and ttings are not loose and are secure per torque specications.
3. Close the valve by turning clockwise and pressurize the system to 3600 psi.
4. Leak test using a methane detector or bubble soap.
a. PASS: Continue to step 5.
b. FAIL: Depressurize the system and correct the issue before continuing.
5. Open the manual valve on the fuel tank. Using your hand, rotate the manual valve counter clockwise until fully open. Then close the valve back
1/4 turn (this is will help avoid the valve sticking in the future).
6. Fill the tank with CNG.
7. Pressurize the system by turning the ignition on but do not start the vehicle (3 key cycles). This opens the solenoid and lls the lines.
8. Turn the ignition off, then back on and start the engine. This is to pressurize the lines again. While the engine is running, perform a leak test by
using a methane detector, bubble soap, or other appropriate means.
a. PASS: Complete required paper work and notify your supervisor.
b. FAIL: Turn off the ignition and manually shut-off on the cylinder (tank) valve. Depressurize the system and correct any issues. After all
corrections have been made, open the manual shut-off valve and start the engine. Run the leak test again. For un-repairable issues, notify
appropriate personnel for further instructions.
9. Third party installers: After completing the nal checklist, it is required that an original or a copy of the entire completed checklist be sent to
ALTECH-ECO. Failure to do so will void the warranty and may result in suspension of installer’s license. For additional information, contact your
supervisor.
Open manual valve counter-clockwise until fully open.
Then a 1/4 turn back.
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