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D-4
MAINTENANCE
D-4
COOLING SYSTEM
HOT COOLANT
can burn skin.
• Do not remove cap if radiator is
hot.
------------------------------------------------------------------------
Check the coolant level by observing the level in the
radiator and recovery bottle. Add 50/50 antifreeze /
water solution if the level is close to or below the
"LOW" mark. do not fill above the "FULL" mark.
Remove radiator cap and add coolant to radiator. Fill
up to the top of the tube in the radiator filler neck
which includes a connecting hose coming from the
thermostat housing.
To drain the coolant, open the valve of the radiator.
Open the radiator cap to allow complete drainage.
(Tighten the valve and refill with a 50/50
antifreeze/water solution.) Use an automotive grade
(low silicate) ethylene glycol antifreeze. The cooling
system capacity is 3.6L (3.85 quarts). Squeeze upper
and lower radiator hoses while filling to bleed air from
system coolant. Replace and tighten the radiator cap.
Always premix the antifreeze and clean tap water
before adding to the radiator. It is very important
that a precise 50/50 solution be used with this
engine year round. This gives proper cooling dur-
ing hot weather and freezing protection to -37° C
(-34° F).
Cooling solution exceeding 50% ethylene glycol
can result in engine overheating and damage to
the engine. Coolant solution must be premixed
before adding to radiator.
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Periodically remove the dirt from the radiator fins.
Periodically check the fan belt and radiator hoses.
Replace if signs of deterioration are found.
TIGHTENING THE FAN BELT
If the fan belt is loose, the engine can overheat and
the battery lose its charge. Check tightness by press-
ing on the belt midway between the pulleys. It should
deflect about 6mm (.25 in) under a load of 9 Kg (20
lbs).
FUEL
At the end of each dayʼs use, refill the fuel tank to min-
imize moisture condensation and dirt contamination in
the fuel line. Do not overfill; leave room for the fuel to
expand.
Use only fresh, No. 2 grade DIESEL fuel. Do not use
kerosene.
See the Engine Operator's Manual for instructions on
replacing the fuel filter.
BLEEDING THE FUEL SYSTEM
You may need to bleed air from the fuel system if the
fuel filter or fuel lines have been detached, the fuel
tank has been ran empty or after periods of long stor-
age. It is recommended that the fuel shutoff valve be
closed during periods of non-use.
The Kubota D722 engine supplied with this welder is
equipped with an automatic bleeding mechanism that
helps purge the air from the mechanical fuel pump
system. It is generally not necessary to open a vent
screw or fuel line fitting to bleed the fuel system.
Operate the priming lever on the pump to assist start-
ing after extended periods of non-use or out of fuel
conditions.
To avoid personal injury, do not bleed a hot
engine. This could cause fuel to spill onto a hot
exhaust manifold, creating a danger of fire.
------------------------------------------------------------------------
Bleed the fuel system as follows:
1. Fill the fuel tank with fuel.
2. Open the fuel shut off valve (vertical position of
handle) on the Fuel Filter.
3. Crank the engine by pressing the start button for 45
seconds.
4. Check to see that fuel is flowing through both fuel
filters.
5. Follow the normal STARTING procedures.
RANGER® 305D (CE)
WARNING
CAUTION
WARNING