Hobart Welding Products Hobart 300/300, Owner'S Manual

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OM-494 Page 36
7-4. Servicing Fuel And Lubrication Systems
Ref. 158 633-C / Ref. 190 377 / Ref. S-176 697
Stop engine and let cool.
1 Oil Filter
2 Oil Drain Plug
3 Oil Drain Hose (Optional)
4 Oil Fill Cap
5 Primary Fuel Filter (Fuel/
Water Separator)
6 Petcock
7 Secondary Fuel Filter
8 Fuel Shutoff Valve Lever
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:
This procedure should only be
done by a Factory Authorized
Service Agent.
Remove Welder A (left) control
panel to access sludge drain plug.
Put metal container under drain and
remove plug. Reinstall plug when
sludge has drained.
Reinstall control panel.
After servicing, start engine
and check for fuel leaks.
Stop engine, tighten connec-
tions as necessary, and wipe
up spilled fuel.
Close doors.
3/8, 7/16, 3/4 in
5
9
6
7
2
1
4
Under Left Side
Of Fuel Tank Behind
Control Panel
Tools Needed:
2
3
8
Valve Open
I
O