Troubleshooting And Maintenance - Chicago Electric 47606 Set Up And Operating Instructions Manual

note: Other than changing or cleaning the carbon brushes, all internal repairs should be done
by a qualified service technician.
problem
Motor doesn't rotate when switched
on.
Abnormal motor noise, rotates slowly,
does not rotate
Partial short circuit
Low main voltage
Overheated gearbox
Sparking
note: Rotary Hammer must be unplugged before performing service and maintenance.
general maintenance:
1. Clean the work surface with a dry brush or clean cloth. Keep moving parts lightly greased.
Always keep motor and vent areas free of dust and debris.
2. Grease the tool after 50 working hours, or more frequently with increased use.
3. Remove drill bits or chisels for storage.
changing carbon brushes:
1. Using a screwdriver, remove the brush cap (70). See FIGURE 3 on page 5.
2. Be careful, the brush Holder (68) may spring out. If it does not spring out easily, gently
use the tip of the screwdriver to remove it. Examine the brush (69); the surface should
be smooth and clean. If scratch marks appear, or it is broken, replace immediately with an
approved replacement brush from Harbor Freight Tools.
3. If the brush (69) isn't damaged, but only dirty, clean it off with a pencil eraser. Gently rub
it until the dirt is removed. Remove the eraser dust from the brush (69) when you are
through cleaning it.
4. Gently reinstall the brush (69) into the brush Holder (68) and screw the brush cap (70)
back on the unit and tighten.
SKU 47606

Troubleshooting and Maintenance

1. Disrupted power
2. Poor switch contact
3. Armature or field coil burnt
4. Broken Stator Coil
5. Worn carbon brushes
Overload due to excessive drilling
depth or pressure
Short circuit or open circuit armature
Main power voltage too low
1. Overload, dull bit
2. Damp coils
3. Incorrect fitting
4. Decrease in voltage
1. Short circuit or break at armature
2. Surface of armature dirty or rough
For technical questions, please call 1-800-444-3353.
cause Action
1. Check Power Supply
2. Repair switch
3. Change coil
4. Replace Stator coil
5. Replace carbon brushes
Reduce drill depth or
pressure/decrease force
Repair or change armature
Adjust main power voltage
1. Reduce load, sharpen or
replace bit
2. Dry coils
3. Repair/change armature
4. Adjust voltage
1. Repair armature
2. Clean armature
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