Service manual

1 PAPER FEED SECTION
5-8
DUPLO DF-755 86V-M12D0-0
1.7 Adjusting the MB belt Tension
If the tension of the MB belt is not enough, a feed error or folding error due to a noise or
slippage may occur.
1) Apply pressure on the MB belt with a tension gauge of 2 kg.
Apply the tension gauge to the middle point between the motor pulley and paper feed
clutch pulley.
[1]
Tension gauge
[2]
MB belt
[3]
Motor pulley
[4]
Paper feed clutch pulley
2) Position the idler bracket so that when a load of 1 kg is applied with a tension gauge, the
belt slackens by approximately 10 mm (0.39 inch).
[5]
Idler bracket
[A]
10 mm (0.39 inch)
Note
Oil or grease adhered to the MB belt or each driving section may cause trouble such
as slippage and shortening of a belt lifespan. Clean them with a cloth moistened with
alcohol.
[1]
[2]
[3]
[5]
[4]
[A]