Miller Big Blue 300 PRO Series, Owner'S Manual

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Complete Parts List is available at www.MillerWelds.com
OM-259 355 Page 49
803 581 / 907 427 − 6
To replace primary fuel filter:
For CAT and Kubota Engines: Turn
filter counterclockwise. Remove fil-
ter.
For Mitsubishi Engines: Turn filter
retaining ring counterclockwise to
remove. Pull filter straight down to
remove.
Fill new filter with fresh fuel. Apply
thin coat of fuel to gasket on new fil-
ter.
For CAT and Kubota Engines: In-
stall new filter and turn clockwise.
For Mitsubishi Engines: Install new
filter and reinstall retaining ring.
Bleed air from fuel system accord-
ing to engine manual.
Inspect fuel lines, and replace if
cracked or worn.
To drain water from fuel system:
See engine manual.
To replace secondary fuel filter:
Note direction of fuel flow as indi-
cated by arrow on side of filter. Re-
move fuel line clamps and discon-
nect fuel lines from fuel filter. Re-
place filter , reconnect fuel lines,
and reinstall clamps.
To drain sludge from fuel tank:
!
Beware of fire. Do not smoke
and keep sparks and flames
away from drained fuel. Dis-
pose of drained fuel in an en-
vironmentally-safe manner.
Do not leave unit unattended
while draining fuel tank.
!
Properly lift unit and secure
in a level position. Use ade-
quate blocks or stands to
support unit while draining
fuel tank.
Attach 1/2 ID hose to drain valve.
Put metal container under drain,
and use screwdriver to open
sludge drain valve. Close valve
when sludge has drained. Remove
hose.
Close door.
5
4
1
3
Mitsubishi Engine
3
4
1
5
7
Kubota Engine