Craftsman 351.226121 Operator's Manual page 11

SYMPTOM
Motor overheats
Motor stalls (resulting
in blown fuses or
tripped circuit breakers)
Frequent opening of
fuses or circuit breakers
Motor problems
in general
Teeth ripping from 1.
blade 2.
3.
4.
5.
Motor running too hot 1.
2.
3.
4.
Coolant does not flow 1.
2.
3.
4.
Excessive blade 1.
breakage 2.
3.
4.
5.
6.
7.
8.
Premature blade 1.
dulling 2.
3.
4.
5.
6.
7.
POSSIBLE CAUSE(S)
1. Motor overloaded 1.
2. Air circulation around motor 2.
restricted
1. Short circuit in motor; connections 1.
loose; or shorted terminals or worn
insulation on lead wires
2. Low voltage
3. Incorrect fuses or circuit breakers
4. Motor overloaded
1. Motor overloaded
2. Incorrect fuses or circuit breakers
Various causes
Teeth too coarse for work 1.
Too heavy feed 2.
Too slow speed 3.
Vibrating workpiece 4.
Gullets loaded 5.
Blade tension too high 1.
Blade too coarse for work 2.
(pipes especially)
Blade too fine for work
(heavier, soft material)
Gears need lubrication 4.
Pump motor burned out 1.
Dirty screen/filter on pump 2.
Loose impeller 3.
Coolant level too low 4.
Material loose in vise 1.
Incorrect speed or feed 2.
Teeth too coarse for material 3.
Incorrect blade tension 4.
Teeth in contact with work before 5.
saw is started
Blade rubs on wheel flange 6.
Misaligned guides 7.
Blade too thick for wheel diameter 8.
Teeth too coarse 1.
Too much speed
Inadequate feed pressure
Hard spots or scale in/on material
Work hardening of material
(especially stainless steel)
Blade installed backwards
Insufficient blade tension
CORRECTIVE ACTION
Reduce load on motor
Clean motor to provide normal air circulation
around motor
Inspect terminals in motor for damaged
insulation and shorted wires
2. Correct the low line voltage conditions
3. Install correct fuses or circuit breakers
4. Reduce load on motor
1. Reduce load on motor
2. Install correct fuses or circuit breakers
To troubleshoot and service motor consult qualified
technician
Use finer tooth blade
Decrease feed pressure
Increase speed
Clamp work securely
Use coarse tooth blade or use brush to remove
chips
Reduce tension on blade
Use finer tooth blade
3. Use coarser tooth blade
Check oil bath
Replace pump
Clean
Tighten
Refill coolant tank
Clamp work securely
Check Machinist Handbook
Check Machinist Handbook for recommended
blade type
Adjust to where blade just does not slip on wheel
Place blade in contact with work after
motor is started
Adjust tracking
Adjust guide bearings
Use thinner blade
Use finer tooth blade
2. Try next lower speed
3. Decrease spring pressure
4. Reduce speed, increase feed of saw
5. Increase feed pressure by reducing
spring tension
6. Remove blade, twist inside out and reinstall blade
7. Increase tension to proper level
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