Hobart Welding Products CONTRACTOR 3025 - Manual (Page 32)

OM-492 Page 28
7-5. Servicing Engine Lubrication And Fuel Systems
Ref. 189 438-A / 802 330-B / S-0842
Tools Needed:
5
4
4
2
3
Y Stop engine and let cool.
1 Oil Filter
2 Oil Drain Valve
3 1/2 ID x 12 in Hose
4 Fuel Line
5 Primary Fuel Filter
6 Secondary Fuel Filter
7 Petcock
8 Fuel Tank Sludge Drain
To change oil and filter:
Pull oil drain hose through access hole in
base. Change engine oil and filter according
to instructions in engine manual.
Y Close valve and valve cap before ad-
ding oil and running engine.
Fill crankcase with new oil to full mark on
dipstick (see Section 4-2).
To drain water from fuel system:
Open secondary fuel filter petcock and
drain water into metal container. Close pet-
cock when water-free fuel flows.
To change fuel filters:
Install new primary fuel filter as shown.
Replace secondary fuel filter according to
engine manual.
Replace fuel lines if cracked or worn.
Wipe up any spilled fuel.
Y After servicing, start engine and
check for fuel leaks.
Stop engine, tighten connections as
necessary, and wipe up fuel.
To change coolant:
Change coolant according to engine manu-
al.
Run engine until engine reaches normal op-
erating temperature. Loosen air bleed
screw to remove air from cooling system.
Tighten screw.
Check coolant level in recovery tank. Add
coolant if necessary.
To drain sludge from fuel tank:
Put metal container under drain, and re-
move sludge drain plug. Reinstall plug
when done.
1
8
9/16 in
FLOW
6
7