Miller Electric Big Blue 251D - Manual (Page 31)

OM-480 Page 27
8-4. Servicing Fuel And Lubrication Systems
Ref. 800 159-E / Ref. 206 029
Y Stop engine and let cool.
1
Oil Filter
2 Oil Drain Plug
3 Oil Fill Cap
4 Primary Fuel Filter (Fuel/
Water Separator)
5 Petcock
6 Secondary Fuel Filter
7 Fuel Shutoff Valve
8 Fuel Line
9 Sludge Drain Plug
To change oil and filter:
See engine manual.
To drain water from fuel system:
Open primary fuel filter petcock and
drain water into metal container.
Close petcock when water-free fuel
flows.
To replace primary 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 replace secondary fuel filter:
See engine manual.
To drain sludge from fuel tank:
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.
4
5
2
1 6
7
9
7/16, 11/16 in
Valve Open
Tools Needed:
3
8