Craftsman 247.370160 - Manual (Page 17)

SERVICE AND MAINTENANCE
Blade Sharpening
To properly sharpen the cutting blades, remove equal amounts of
metal from both ends of the blades along the cutting edges, parallel to
the trailing edge, at a 25° to 30° angle. See Figure 16.
Blade Installation
NOTE: It is important that each cutting blade edge be ground equally
to maintain proper blade balance. A poorly balanced blade will cause
excessive vibration and may cause damage to the mower and result
in personal injury. The blade can be tested by balancing It on a round
shaft screwdriver. Grind metal from the heavy side until It balances
evenly.
AWARNING
An unbalanced blade will cause excessive vibration when rotating
at high speeds. It may cause damage to mower and could break,
causing personal injury.
1. Place the cutting blade, locking plate, and blade bolt on the motor
shaft and thread the blade bolt in finger tight.
NOTE: Make certain to replace the parts in the exact order in
which they were removed. When installing the cutting blade,
be sure It is installed with the curved ends pointing towards the
mower deck and not towards the ground.
2. Torque the blade bolt down using a torque wrench to assure the
bolt is tightened properly. The recommended torque for the blade
bolt is 170-220 in. lbs.
To ensure safe operation of your mower, periodically check the blade
bolt for correct torque.
MAINTENANCE SCHEDULE
AWARNING
Always stop the motor and unplug mower before cleaning, lubricating
or performing any repairs or maintenance on the lawn mower. Always
wear safety glasses during operation or while performing any adjust­
ments or repairs.
Follow the maintenance schedule given below. This chart describes
service guidelines only. Use the Service Log column to keep track of
completed maintenance tasks. To locate the nearest Sears Service
Center or to schedule service, simply contact Sears at
1-800-4-MY-HOME®.
Interval Item Service Service Log
Each Use 1. Mower blades 1. Sharpen as required
2. Loose or missing hardware 2. Tighten or replace
3. Controls 3. Check for proper operation
4. Motor 4. Remove any buildup of grass and
leaves on or around the motor cover
(do not use water).
5. Deck 5. Clean underside of deck with a
suitable tool (do not use water).
Annually or 25 hours 1. Wheels 1. Lube with light oil
2. Rear discharge door and
side mulch plug 2. Lube torsion spring and pivot point
with light oil.
3. Mower blades 3. Sharpen and balance
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