Alpha Professional Tools AEP-458 - Manual (Page 20)

Maintenance and inspection
WARNING
Be sure to unplug the cord from the outlet. Otherwise, the Unplug the power
machine may start abruptly and it may cause an accident. cord from the outlet.
Rubber gloves and waterproof safety boots
Always be sure to wear rubber gloves and waterproof safety boots. If they are worn, cracked or have any
holes in them, replace them.
Checking the attaching screws
Before starting any operation, if any screws are loose.
If the machine is used with loose screws, it is dangerous. Be sure to retighten them.
Checking the carbon brush
Carbon brushes are used inside the motor and will wear out over time.
If a carbon brush is worn too much, it may cause the motor to malfunction or fail. If the length of the carbon
brush reaches the wear limit (4 mm), replace it.
Keep the carbon brush clean, so that it can slide freely in the brush holder.
Replacement procedure When the brush cover (see “part
names”) is removed using a flat
screwdriver, the carbon brush can be
removed.
CAUTION
When replacing the carbon brush with a new
one, be sure to use only an MG-1003 carbon
brush made by Sanko (or Mitachi).
Handling the motor
The motor windings are the heart of this machine. Pay special attention not to damage the windings and
not to expose them to oil or water.
CAUTION
If dust or dirt settles in the motor, it may cause it to malfunction.
After 50 hours operation, run the motor with no load and blow dry air in the End Cap (see “part
names”).
This is effective for removing dust or dirt.
10 mm
4 mm
wear limit
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