TP-6907 5/1688 Section 6 Component Testing and Adjustment
6.7.1 Fuel Solenoid Valves
Two 12 VDC fuel solenoid valves or one dual-solenoid
valve are mounted upstream of the engine on the
generator set skid. See Figure 6-9 or Figure 6-10. The
fuel solenoid valves provide automatic fuel on/off
control. The engine starting battery powers the solenoid
valve and the engine starting controls open the valves
when the engine cranks or runs.
Note: On the model 24RCL, two fuel solenoid valves
were replaced with one dual-solenoid valve in
February, 2016. If valve replacement is required,
replace both valves with one dual-solenoid valve.
Fuel Valve Operation Test Procedure
1. Disconnect the positive (+) battery lead from the
gas valve terminal.
2. Apply 12 VDC to the gas valve terminal and listen
for an audible click, indicating that the valve
actuates.
3. Replace the gas valve if it does not actuate in
step 2.
6.7.2 Checking the Fuel Pressure
Connect a pressure gauge or manometer to the port on
either side of the fuel solenoid valve to measure the fuel
pressure to the engine. See Figure 6-11 or Figure 6-12.
Measure the fuel pressure with the generator set
running at rated load. The fuel pressure should b e
5--11 in. water column or 1.2--2.7 kPa. Contact the fuel
supplier if the inlet pressure is not within the specified
range.
1
GM82797
1. Fuel pressure ports
Figure 6-11 Fuel Solenoid Valve
1
GM96976
1. Fuel pressure port, 1/8-27 NPT (2 places)
Figure 6-12 Dual-Solenoid Fuel Valve
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