5. Maintenance and Inspection
8) If the belt has been replaced at the same time, adjust the tension of the belt.
Hand a cable band (thin string) on the edge of the motor unit and pull it on a tension gauge
with the specified load (specified value of the belt tension).
When the load reached the specified, tighten the bolts (where marked with a circle) with a
2.5mm-sized (RA4R), 3mm-sized (RA6R/RA7R), or 4mm-sized (RA8R) hexagonal wrench to
hold the unit in the place.
RA4R RA6R, RA7R, RA8R
Model Tightening Torque
RA4R 162N cm
RA6R 323N cm
RA7R 323N cm
RA8R 631N cm
Model Tension Force
RA4R 20 to 25N
RA6R 25 to 30N
RA7R 80 to 90N
RA8R 180 to 200N
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