Maintenance; Lubrication; Chipper-Shredder - Craftsman 247.799890 Owner's Manual

GENERALRECOMMENDATIONS
WARNING: ALWAYS STOP THE ENGINE
AND DISCONNECT THE SPARK PLUG
WIRE BEFORE PERFORMING ANY
MAINTENANCE OR ADJUSTMENTS.
• Periodically check all fasteners and be sure they
are tight.
• Follow the Maintenance Schedule on previous
page.
CHIPPER-SHREDDER
LUBRICATION
Lubricate the pivot points on the chute deflector and
chipper chute once a season using a light oil.
ENGINE
ENGINE OIL
Only use high quality detergent oil rated with API ser-
vice classification SG. Select the oil's viscosity grade
according to your expected operating temperature.
Colder ,,i 32°F = Warmer
5W30 SAE 30
NOTE: Although multi-viscosity oils (SE30, 10W30,
etc.) improve starting in cold weather, these multi-vis-
cosity oils will result in increased oil consumption
when used above 32°F. Check your oil level more fre-
quently to avoid possible engine damage from run-
ning low on oil.
Your four-cycle engine will normally consume some
oil--therefore, check engine oil level regularly approx-
imately every five hours of operation and before each
usage. Stop engine and wait several minutes before
checking oil level. With engine level, the oil must be to
FULL mark on dipstick (refer to figure 7). Change
engine oil after the first five hours of operation, and
every twenty-five hours thereafter.
To Drain Oil:
• Drain oil while engine is warm.
a. Remove oil drain plug. Refer to figure 7. Catch
oil in a suitable container.
b. When engine is drained of all oil, replace drain
plug securely.
• Refill with fresh oil. Refer to GAS AND OIL FILL-
UP section.
• Replace dipstick.
AIR CLEANER
The air cleaner prevents damaging dirt, dust, etc.,
from entering the carburetor and being forced into the
engine and is important to engine life and per-
formance.
Never run your engine without air cleaner com-
pletely assembled.
To Service Air Cleaner:
Service pre-cleaner after every 25 hours of use, or at
least once a season. Service cartridge every 100
hours of use, or at least once a season. Service pre-
cleaner and cartridge more often under dusty condi-
tions.
Loosen screw and remove cover.
To service pre-cleaner, wash in liquid detergent
and water. Squeeze dry in a clean cloth. Saturate
in engine oil. Squeeze in a clean, absorbent cloth
to remove all excess oil. If pre-cleaner is very dirty,
replace it.
• To service cartridge, clean by tapping gently on a
flat surface. If very dirty, replace. Do not oil car-
tridge.
NOTE: Do not use petroleum solvents (e.g. kerosene)
or pressurized air to clean cartridge. They will cause
cartridge to deteriorate.
• Reinstall cartridge and pre-cleaner.
• Replace cover, and tighten screws securely.
Screw
Cover
_r
dge
Base
10
FIGURE 10.
CLEAN ENGINE
Clean engine periodically. Remove dirt and debris
with a cloth or brush. Cleaning with a forceful spray of
water is not recommended as water could contami-
nate the fuel system.
Yearly or every 25 hours, whichever occurs first,
remove the blower housing and clean the areas
shown in figure 11 to avoid overspeeding, overheating
and engine damage. Clean more often if necessary.