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MODEL 520
REPLACING DC MOTOR AND ADJUSTING
MOTOR BELT TENSION
TO REMOVE:
1. Remove the front and rear covers (see page 6 and 8).
2. Remove the two setscrews, then remove the DC motor and belt.
TO INSTALL:
3. Lightly tighten the two screws.
4. Put the motor belt on the pulley and adjust the belt deflection to about 7 to 9 mm by pressing
the middle of the motor belt with your finger (with approximately 300 grams of pressure).
Then, tighten the screws firmly.
5. Install the front and rear covers.
Pressure 300g
Belt tension:
7~9 mm
Setscrew
DC motor
Belt
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