Plumbing Components
Inspecting
See
Fig. 6
for plumbing component locations.
Use a bubble solution to check for leaks while per-
forming the following visual inspection.
1.
Check the following components for signs of
damage or leaks.
•
Pressure control regulator
•
Vapor shutoff valve
•
Secondary relief valve
•
Primary relief valve and threaded connec-
tions
•
Excess flow valve
•
Fuel shutoff valve
•
Fill check valve
2.
Inspect the fuel fill line for signs of damage,
kinked or crushed piping, or chafing.
3.
Ensure the red cap is present on the secondary
relief valve.
4.
Inspect the fuel tank pressure gauge for cracks
in the sight glass. Ensure the indicator needle is
present and in working condition. Inspect the
gauge face for accuracy and legibility.
5.
Inspect all vent lines for kinks, and signs of leaks
or damage.
6.
Replace leaking or damaged fuel lines. Repair or
replace leaking or damaged fittings.
Fuel Level Sender Component
Inspecting
1.
Inspect the fuel level sender wiring harness for
signs of loose connections or damage. Look for
cracking or signs of moisture intrusion.
2.
Inspect the fuel level sender box (
Fig. 6
) for
signs of leaks or damage. Ensure that the re-
tainer clips are installed on the mounting ears.
02/04/2014
f470617
1
2
3
6
8
9
11
12
4
5
7
10
1.
Pressure Control Regulator
2.
Vapor Shutoff Valve
3.
Fuel Fill Hose
4.
Secondary Relief Valve (red cap)
5.
Fuel Fill Fitting
6.
Fuel Level Sender Box
7.
Primary Relief Valve
8.
Tank Pressure Gauge
9.
Fill Vent Fitting
10. Excess Flow Valve
11. Fuel Shutoff Valve (liquid)
12. Fill Check Valve
Fig. 6, LNG Tank Plumbing Components
Fuel
47
Cascadia Maintenance Manual, August 2015
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