freightliner BUSINESS CLASS M2 100, Maintenance Manual

Page: 159 / 198

9. Inspect the shroud cover for dents or other signs
of damage. Ensure that the shroud cover latches
are in working condition and fasten the shroud
cover securely to the tank.
10. Replace leaking or damaged fuel lines. Repair or
replace leaking or damaged fittings.
Plumbing Components
Inspecting
See Fig. 8 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.
05/29/2009 f470534
1
2
3
4
6
5
6
1. Fuel Fill Fitting
2. Fuel Outlet Line
(liquid)
3. Primary Relief Vent
Line (relief valve)
4. Fill Vent Fitting (vent)
5. Shroud Cover
6. Shroud Cover Latches
Fig. 7, Fuel Tank Outer Shell
05/05/2010 f470533
1
2
3
4
5
6
7
8
10
11
12
9
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. 8, Fuel Tank Plumbing Components
Fuel
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Business Class M2 Maintenance Manual, March 2018
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