Western Star 47X 2020, Maintenance Manual

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6. Remove the sight bowl from the filter element.
Clean the O-ring seating surface.
7. Apply a thin coating of clean diesel fuel or en-
gine oil to the O-ring and the new gasket, and
assemble filter and bowl.
8. If the filter head is not equipped with a priming
pump, fill the filter element and sight bowl as-
sembly with clean diesel fuel.
9. Spin the entire assembly onto the mounting head
and tighten by hand until snug.
10. Connect the heater and water sensor wiring har-
nesses, if equipped.
11. If equipped with a priming pump, use it to fill the
filter/bowl assembly. Prime the fuel/water separa-
tor.
12. Start the engine and check for leaks.
13. Shut down the engine and repair any leaks.
47–03 Fuel Tank Band-Nut
Tightening
Hold each fuel tank band retention nut with a wrench
while backing off its jam nut, then tighten the reten-
tion nuts 30 to 35 lbf·ft (41 to 46 N·m). After the re-
tention nuts have been tightened, hold each retention
nut with a wrench while tightening its jam nut 30 lbf·ft
(41 N·m).
IMPORTANT: Do not overtighten.
Fuel
47
47X and 49X Maintenance Manual, August 2020
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