Craftsman 351.211930 Operator's Manual page 7

SYMPTOM
Grinder won't start
Excessive vibration
Motor overheating
Fuses are being blown
or circuit breakers tripped
Grinder will not operate in
variable speed mode
POSSIBLE CAUSE(S)
1, Blown line fuse or tripped circuit breaker
2., Low line voltage
3, Material wedged between wheel and
guard
4 Defective switch
5_ Defective, blown capacitor
6., Defective circuit board
f, Improper mounting of grinder or
accessories
2,, Grinding wheel out of balance
3. Improper wheel mounting
I. Excess pressure required to grind material
2. Grinding on side of wheel
3, Motor not turning freely (without power)
CORRECTIVE ACTION
I, If fuse is blown, replace with fuse of proper size., If
breaker tripped, reset it
F2, Check power supply for voltage and correct as needed
3, Turn grinder off and remove material
4., Replace switch
i 5, Replace capacitor
6. Replace circuit board
1. Remount
2. Dress wheels or replace wheels
3, Remount wheels, but rotate one wheel 90 ° with
respect to its previous position. Other wheei should
remain in its original position
1. Dress wheel or replace wheel with one of proper grit
2, Gdnd only on face of wheel
3 Clean around wheels and shaft andlor replace
bearings
Overl0ading due to binding 1 Clean around wheefs and shaft and/or replace
bearings
2 Defective plug
3 Defective cord
4 Defective switch
5: Faulty ,internal widng
1 Defective variable speed switch
2 Defective sensor
3. Defective circuit board
2 Replace plug
3 Replace cord
4, Replace switch
5. Contact authorized Sears Service Center
1. Replace switch
2. Replace sensor
3. Replace circuit board