Husqvarna LT138 Owner's Manual page 17

CLEAN AIR SCREEN
Air screen must be kept free of dirt and chaff to prevent
engine dam age from overheating. Clean with a wire brush
or compressed air to re move dirt and stubborn dried gum
fi bers.
ENGINE COOLING FINS (See Fig. 12)
Remove any dust, dirt or oil from engine cooling fi ns to
prevent engine damage from overheating.
• Remove screws from blower housing and lift housing
and dipstick tube assembly off engine.
• Cover oil fi ll opening to prevent entry of dirt.
• Use compressed air or stiff bristle brush to thoroughly
clean engine cooling fi ns.
• To reassemble, reverse above procedure.
BLOWER
SCREWS
HOUS ING
AIR SCREEN
OIL FILL
TUBE AS SEM BLY
OIL FILL
OPENING
ENGINE COOLING FINS
MAINTENANCE
SCREWS
SPARK
PLUG
FIG. 12
AIR FILTER (See Fig. 13)
Your engine will not run properly using a dirty air fi lter.
Replace pre-cleaner after every 25 hours of operation or
every season. Service paper cartridge every 100 hours of
operation or every season, whichever occurs fi rst.
Service air cleaner more often under dusty conditions.
• Pull up on air fi lter cover handle and rotate towards
engine.
• Remove cover.
• Carefully remove air fi lter cartridge and pre-cleaner
from base.
• Clean base carefully to prevent debris from falling into
carburetor.
NOTE: If very dirty or damaged, replace cartridge.
• Place new pre-cleaner and cartridge fi rmly in base.
• Align tabs on cover with slots in blower housing and
replace cover.
• Hook handle on cover and push down on handle to
close.
IMPORTANT: Petroleum solvents, such as kerosene, are
not to be used to clean the cartridge. They may cause
de te ri o ra tion of the cartridge. Do not oil cartridge. Do not
use pres sur ized air to clean cartridge.
PRE-CLEANER
BASE
17
HAN DLE
COVER
CARTRIDGE
TABS
SLOTS
FIG. 13