
EC-42S  CONCRETE MIXER — TROUBLESHOOTING (ENG./MIXER)
TABLE 9. ENGINE TROUBLESHOOTING (Continued)
SYMPTOM | POSSIBLE PROBLEM | SOLUTION | |
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Operation not satisfactory | 
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  | Governor adjustment improper?  | Adjust governor to correct lever.  | |
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  | Governor spring defective?  | Clean or replace ignition.  | |
Rotational speed fluctuates.  | 
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Fuel flow erratic?  | Check fuel line.  | ||
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  | Air taken in through suction line?  | Check suction line.  | |
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Recoil starter not working  | Dust in rotating part?  | Clean recoil starter assembly.  | |
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properly.  | Spring spring failure?  | Replace sprial spring.  | |
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TABLE 10. MIXER TROUBLESHOOTING
SYMPTOM  | POSSIBLE PROBLEM  | SOLUTION  | |
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  | Defective ring gear?  | Check that the ring gear and bearings are not worn . Replace as  | |
  | necessary.  | ||
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  | Defective pinion gear?  | Check that the pinion gear and bearings are not worn . Replace as  | |
Drum rotates rough.  | necessary.  | ||
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  | Worn   | Replace   | |
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  | Loose pulley?  | Tighten or replace pulley.  | |
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  | Incorrect or no voltage being  | Check that the electric motor has the correct supply voltage.  | |
  | supplied to electric motor?  | ||
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  | Power to electric motor? | Inspect power source and extension cord. Push reset button on  | |
  | electric motor. Make sure correct voltage is being supplied to motor.  | ||
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  | Check level of fuel in fuel tank. Add fuel if necessary. Make sure  | |
Drum does not rotate at all.  | Fuel?  | fuel is being supplied to the engine. Check to ensure that the fuel  | |
  | filter is not clogged.  | ||
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  | Broken  | Replace  | |
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  | Defective ring or pinion gears?  | Check that the gears and bearings are not broken. Replace as  | |
  | necessary.  | ||
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  | Defective electric motor?  | Replace electric motor.  | |
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