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OM-474 Page 27
7-4. Servicing Fuel System
Ref. ST-154 952-C / Ref. ST-154 954 / ST-155 872-A / Ref. ST-191 898
Y Stop engine and let cool.
1 Fuel Filter
2 Petcock
3 Bleeder Valve
4 Fuel Shutoff Valve
5 Fuel Line
6 Sludge Drain Plug
To drain water from fuel system:
Open filter petcock and drain water
into metal container. Close petcock
when water-free fuel flows.
To replace fuel filter:
Close shutoff valve and turn filter
counterclockwise. Remove filter.
Apply thin coat of fuel to gasket on
new filter. Install new filter and turn
clockwise. Open shutoff valve.
Bleed air from fuel system accord-
ing to engine manual.
Inspect fuel line, and replace if
cracked or worn.
To drain sludge:
Put metal container under drain,
and remove sludge drain plug. Re-
install plug when done.
Y After servicing, start engine
and check for fuel leaks.
Y Stop engine, tighten connec-
tions as necessary, and wipe
up spilled fuel.
Close doors.
Tools Needed:
3/8 in
3
1
2
Valve Closed
4
5
6