Maintenance - Sears Craftsman 247.88790 Manual De Uso

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General Recommendations
1. Always observe safety rules when performing
any maintenance.
2. The warranty on this snow thrower does not cover items that have
been subjected to operator abuse or negligence. To receive full
value from warranty, operator must maintain the snow thrower as
instructed here.
3. Some adjustments will have to be made periodically to maintain
your unit properly.
4. Periodically check all fasteners and make sure these are tight.
WARNING: Always stop engine and disconnect
spark plug wire before performing any maintenance
or adjustments. Always wear safety glasses during
operation or while performing any adjustments or
repairs.
Lubrication
1. Drive Mechanism: Once a season or after every 25 hours of
operation, remove rear frame cover and lubricate any chains,
sprockets, gears, bearings, and shafts with engine oil or lubricant
spray.
IMPORTANT: Avoid oil spillage on rubber friction wheel and aluminum
drive plate.

MAINTENANCE

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Figure 13
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Figure 14
2. Hex Gear Shaft: Once a season, lubricate the hex shaft with a
penetrating oil, but not grease. Refer to Figure 21 on page 17.
3. Gear Case: The gear case is lubricated with grease at the factory
and does not require regular lubrication. However, if disassembled
for any reason, lubricate with 2 ounces of Shell Alvania™ grease
(part # 737-0168). Before reassembling, remove old sealant and
apply new sealant.
NOTE: Do not overfill the gear case. Damage to the seals could result.
4. Wheels: Once a season, remove the bolt from each wheel and
take the wheel off the axle. Apply a multipurpose automotive
grease on the shaft before putting back the wheels.
5. Auger Shaft: At least once a season, remove the shear pins on
auger shaft. Spray lubricant inside shaft, around the spacers. Also
lubricate the flange bearings found at either end of the shaft. See
Figure 13.
6. Drive/Auger Control Lock: The ends of the control rods which
interlock the drive and auger controls must be lubricated at least
once a season or every 25 hours of operation using a multi-purpose
automotive grease. This can be accessed beneath handle panel.
Check V-Belts
Follow instructions below to check the condition of the drive belts
every 50 hours of operation.
1. Remove the plastic belt cover on the front of the engine by remov-
ing two self-tapping screws.
2. Visually inspect for frayed, cracked, or excessively worn out belts.
Replace, if necessary, following instructions on pages 16 and 17.
Check Friction Wheel
Follow instructions below to check the condition of the friction wheel
rubber every 50 hours of operation.
1. Remove the self-tapping screws from the frame cover underneath
the snow thrower. Refer to Figure 18.
2. Visually inspect the friction wheel rubber for excessive wear,
cracks, or loose fit on the friction wheel drive hub.
3. Also, engage the drive control and check if the friction wheel is
making contact with drive plate. If it does not make contact, adjust
the drive cable (refer to page 19) and recheck the friction wheel.
4. Replace friction wheel rubber if necessary. Refer to instructions on
page 17.
5. Re-attach frame cover to the snow thrower and put the equipment
back to operating position.
Checking Oil Level
1. Be sure engine is upright and level
2. Unscrew oil fill cap from oil filler tube and wipe dipstick clean.
3. Screw oil fill cap back into oil filler tube. Tighten securely.
4. Unscrew and remove oil fill cap from oil filler tube. Note oil level. If
oil reading on dipstick is below "ADD" mark, slowly add oil to reach
"FULL" level. See Figure 14.
5. Screw oil fill cap back into oil filler tube. Tighten securely.
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