Solenoids - Stuck Closed or Nonoperational

PROCEDURE
1. Connect the Rotunda Fuel Filter Neck Venting Kit 134-00117 and Rotunda Venting Hose 134-00118 or equivalent to the vent stack then to the vehicle fuel fill valve.

NOTE: Solenoid diagnostics must be completed on all tank solenoid valves prior to venting.

NOTE: All fuel tank solenoid valves should be in the locked down position.

2. Connect the Rotunda Grounding Cable 134-00121 or equivalent to the vehicle on the rear of the fuel filler valve assembly. Then connect the ground cable to earth ground.
3. Connect battery ground cable.

NOTE: Make sure battery is fully charged.

4. Remove tank manual lock out from the solenoid valve.
5. Install Rotunda Manual Override Tool 134-00050 or equivalent. Tighten to 38-43 Nm (28-31 lb ft).

WARNING: Make sure the jackscrew in the Rotunda Manual Override Tool 134-00050 or equivalent is retracted fully (counter clockwise) prior to installation into the tank solenoid valve. Installation of the override tool in the venting position will cause natural gas to be immediately released.

CAUTION: Once solenoid valve has been opened by use of Rotunda Manual Override Tool 134-00050 or equivalent, the solenoid valve MUST be replaced.

6. Turn the Rotunda Manual Override Tool 134-00050 or equivalent jackscrew clockwise until the fuel flows.
7. Open the manual backflow valve on the fuel filler valve and note pressure on gauge of the Rotunda Fuel Filter Neck Venting Kit 134-00117 or equivalent. Pressure readings should be tank pressure.
8. Slowly open the bleed valve on the Rotunda Fuel Filter Neck Venting Kit 134-00117 or equivalent and vent tank contents to atmosphere. Venting could take over one hour.
9. Remove the Rotunda Manual Override Tool 134-00050 or equivalent from the solenoid valve.
10. Install the manual lock down valve into the tank solenoid valve. Tighten to 38-43 Nm (28-31 lb ft).

NOTE: Make sure the jackscrew is fully retracted prior to installation.

11. Tighten manual lock down valve jackscrew to 7-9 Nm (62-79 lb in).
12. Close bleed valve on the Rotunda Fuel Filter Neck Venting Kit 134-00117 or equivalent and make sure the tank pressure is at or near 0 kPa (0 psi).
13. Close manual backflow valve on the fuel filler valve. Tighten to 7-9 Nm (62-79 lb in).
14. Remove Rotunda Fuel Filter Neck Venting Kit 134-00117 or equivalent from vehicle, then from vent stack.
15. Repeat tank venting until all suspect tanks are vented.