Miller Electric Big Blue 251D Servicing Fuel And Lubrication Systems, To change oil and filter

8-4. Servicing Fuel And Lubrication Systems

	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.
9	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.

3

1 6

2

7 4

Valve Open 8

5

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.

YAfter servicing, start engine and check for fuel leaks.

YStop engine, tighten connec- tions as necessary, and wipe up spilled fuel.

Close doors.

Tools Needed:

7/16, 11/16 in

Ref. 800 159-E / Ref. 206 029

OM-480 Page 27