TP-5977 7/98 Scheduled Maintenance 9
3.4.1 Fuel Regulators
Fuelregulatorsarecompatiblewithbothnaturalgasand
LP gas. Install the spring and retainer when using
natural gas.
Somemodelsrequireremovalofthespringandretaine,
while other models maintain the spring and retainer
when using LP gas. Read and follow the instructions
found on the hang tag attached to the generator set.
SB-527
Figure 3-5. LP Vapor Gas Fuel Regulator
3.5 LP Liquid Withdrawal Fuel
System
With the LP liquid withdrawal system, LP fuel in liquid
form is directed under pressure from the tank to a
vaporizer. Thevaporizer converts thefuel from a liquid
to a gaseous state and then LP is drawn off to the
carburetor. Thesystemalsoincludes afuelvalvewhich
shuts off the fuel flow when the engine is stopped.
Contact an authorized service distributor/dealer for LP
liquid withdrawal availability.
3.6 Combination Gas/Gasoline Fuel
System
The gas/gasoline fuel system operates on gas (LP,
natural gas) or gasoline without modification or
extensive mechanical changeover. The combination
system utilizes gas as the primary fuel and gasoline in
emergency situations. The dual fuel allows for
continued generator set operation in absense of a gas
fuel supply. Contact an authorized service
distributor/dealer for the combination gas/gasoline fuel
system availability.
3.7 Air Cleaner
The engine has a dry-type air cleaner. Replace the air
cleaner element at the interval specified in the service
schedule. Replace the element moreoften if operating
the generator set under dirty or dusty conditions.
Operating the generator set with a dirty air cleaner
element may cause engine damage and increase fuel
consumption. At the time of service remove all foreign
matter from the air cleaner housing.
Every 50 hours (more often if operating under dusty or
dirtyconditions)removeandserviceelementbytapping
element lightly against flat surface to dislodge loose
surface dirt. Do not clean filter using any liquid or
attempt to blow out foreign matter with compressed air
which ruins filter element. Replaceelement if it is dirty,
bent, or damaged.
ADV-5687-C
1
2
1. Air cleaner element
2. Air cleaner housing
Figure 3-6. Air Cleaner Assembly
3.8 Cooling System
Circulating coolant through passages in the engine
coolstheengine. Whentheenginestarts, coolantinthe
engine block and head adsorbs heat diffused by the
engine during combustion. When the engine coolant
temperature reaches approximately 195_F (90_C) the
cooling system thermostat opens and allows heated
coolant to flow through the radiator. A fan on the water
pumppushes or pulls air through the radiator to reduce
the temperature of the coolant. The water pump
recirculates the coolant through the engine to cool the
engine.
Topreventgeneratorsetshutdownand/ordamagefrom
overheating, service the cooling system every
400 hours or 6 months of generator set operation.
Inspect the exterior of the radiator for obstructions;
remove all foreign material with a soft brush or cloth to
avoid damaging radiator fins. Clean radiator with
compressed air or a stream of water, if available, inthe
direction of normal air flow.
Check all hoses and connections for leaks and replace
anycracked, frayed, orspongyhoses. Checkcondition
ofradiatorcaprubbersealwhencheckingcoolantlevel.
Replaceradiatorcapsealifit iscrackedordeteriorated.
Remove all dirt and other debris from radiator cap filler
neck.
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