freightliner 108SD 2021, Driver Manual

Page: 156 / 191

4. Turn the ignition switch to the ON position and
check for fuel gauge response.
5. Repair or replace any damaged fuel gauge
components.
Vaporizer Inspecting
See Fig. 10 for plumbing component locations.
1. Ensure that the vaporizer is secured to its
mounting brackets and that the mounting
brackets are secured to the frame. Inspect for
any signs of looseness.
2. Inspect the vaporizer fuel inlet and outlet lines for
signs of chafing, damage, or leaks.
3. Inspect the vaporizer coolant hoses for signs of
chafing, damage, or leaks.
4. Inspect all fittings for leaks.
5. Inspect the fuel shutoff solenoid valve for signs
of leaks or damage. Inspect the solenoid mount-
ing bracket for looseness.
6. Inspect the overpressure regulator for signs of
leaks or damage.
6.1 Ensure that the regulator is mounted se-
curely.
6.2 Check the overpressure regulator fittings
for signs of leaks or damage.
6.3 Ensure that the adjustment handle locking
nut (at the bottom of the overpressure
regulator) is tightened securely.
06/29/2009 f470536
2
5
6
7
8
9
10
11
12
1
3
4
1. Pressure Relief Device
2. Fuel Inlet Line
3. Check Valve
4. CNG Quick-Connect Port
5. Coolant Inlet Line
6. Vaporizer
7. Fuel Shutoff Solenoid Valve
8. Coolant Outlet Line
9. Pressure Gauge
10. Overpressure Regulator
11. Pressure Relief Valve
12. Fuel Outlet Line
Fig. 10, LNG Vaporizer Assembly
Fuel
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108SD and 114SD Maintenance Manual, May 2018
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