Centinel System – Repair Manual – 005-043   Fuel Shutoff Valve

Use a wrench to hold the nut at the base of the post.

Use a 3/8-inch wrench to remove the nut holding the electrical connection of the fuel shutoff valve coil.

Remove the connection.

Remove the four Allen head capscrews.

Remove the coil (1) and the fuel shield (2).

Remove the valve spring washer (3), valve disc (4), and actuator disc
(5) from the actuator housing (7) from the IFSM (8).

Discard the o-rings (6).

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations for use. Wear goggles and protective clothing to reduce the possibility of personal injury.

WARNING  Some solvents are flammable and toxic. Read the manufacturer’s instructions before using.

Use mineral spirits. Clean all of the parts except the coil assembly.

NOTE: Do not get solvent on the coil. Clean the coil with a dry cloth. Use a 200-grit emery cloth and a flat surface to polish the coil surface.

Check the valve disc, valve seat, and actuator disc for dirt, metal parts, bonding separation, corrosion, cracks, or wear. Replace if necessary.

Use a wire brush to clean any corrosion from the coil terminal.

Check the coil assembly with a multimeter. Replace the solenoid if the resistance is not to specification.

NOTE: If the coil assembly shows 0 ohm, there is an electrical short in the coil.

Assemble the shutoff valve as shown. Install these parts as follows.

Install a new o-ring between the spacer and the electronic control valve body.

Install the spacer o-ring groove toward the coil.

Install the actuator disc with the cup side toward the coil.

Install the spring washer with the cup side toward the coil.

Align the actuator disc, spacer, and valve disc on the electronic control valve body.

Install a new o-ring.

Put the spring washer on the valve disc with the cavity side positioned upward.

NOTE: The coil must be oriented with the electrical connection post on the bottom.

NOTE: Make sure the shutoff valve coil is the correct voltage (12 VDC). The coil voltage and part number are cast into the terminal connection end of the coil.

Install the fuel shield and coil onto the front cover.

Install a new o-ring and tighten the Allen head capscrews.

Install the electrical connection on the fuel shutoff valve.

Install the nut onto the threaded post of the coil.

Use a wrench to hold the nut at the base of the post firmly while tightening the connection nut.