Cummins N14 STC, Celect, Celect Plus – Service Manual 005-043   Fuel Shutoff Valve

Initial Check

TOC

Remove the wire. Make sure the remaining wire connection nut is tight. Tighten the nut.

Torque Value:  3  n.m  [25 in-lb]

Make sure the post is tight and secure in the coil.

NOTE: Only single post coils can be used on the CELECT™ fuel system. Two post coils will interfere with the cooling line.

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

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 CAUTION 

This must be the only wire connected to the shutoff valve.

Connect the wire. Make sure the shutoff valve coil is the correct voltage.

The coil voltage and part number are cast into the terminal connection end of the coil.

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Turn the vehicle keyswitch to the “ON” position.

Check the voltage to the coil with a multimeter, Part Number 3377161 or equivalent.

The voltage must be the same as the battery voltage.

Turn the vehicle keyswitch to the “OFF” position.

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Make sure the coil wire is not connected before checking the coil resistance.

Check the coil resistance with a multimeter.

Fuel System Shutoff Valve Solenoid Specifications
Voltage
Resistance Minimum (Ohms)
Resistance Maximum (Ohms)
6-VDC
1
5
12-VDC
6
15
24-VDC
24
50
32-VDC
42
80
36-VDC
46
87
48-VDC
92
145
74-VDC
315
375
115-VDC
645
735

Replace the coil if the resistance does not meet the specifications.

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Turn the vehicle keyswitch to the “ON” position. Listen for the valve to “click” when the wire is touched to the coil terminal. If the valve does not “click”, repair or replace the fuel shutoff valve.

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Remove

TOC

Remove the coil housing and the fuel shield. Discard the o-ring.

Remove the spring washer, valve disc, actuator disc, and actuator spacer from the valve housing. Discard the o-ring.

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Clean and Inspect for Reuse

TOC

 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.
 WARNING 

Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause personal injury.

NOTE: Do not get the coil wet with solvent. Clean the coil with a dry cloth. Polish the coil face with a 200 grit emery cloth on a flat surface.

Clean all of the parts except the coil assembly in solvent.

Dry with compressed air.

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

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Measure the coil resistance with a multimeter.

Fuel System Shutoff Valve Solenoid Specifications
Voltage
Resistance Minimum (Ohms)
Resistance Maximum (Ohms)
6-VDC
1
5
12-VDC
6
15
24-VDC
24
50
32-VDC
42
80
36-VDC
46
87
48-VDC
92
145
74-VDC
315
375
115-VDC
645
735

Replace the coil if the resistance does not meet the specifications.

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

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Install

TOC

Install these parts as follows.

Install the spacer (7) o-ring groove toward the coil.

Install the actuator disc (5) with the cup side toward the coil.

Install the spring washer (3) with the cup side toward the coil.

Align the actuator disc (5), spacer (7), and valve disc (4) on the front cover (8). Install a new o-ring (6).

Place the spring washer (3) on the valve disc (4), cavity side up, in a position around the valve locator.

Install the fuel shield (2) and coil (1) on the front cover (8). Install a new o-ring and tighten the capscrews.

Torque Value:  3  n.m  [30 in-lb]

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Last Modified:  18-Oct-2011