Toothed belt wheels
Service Instructions 867 - 04.0 - 10/2019 27
6 Toothed belt wheels
The two toothed belt wheels must be positioned above each other so
that the toothed belt can run correctly. In machines with normal lengths,
the winder wheel is directly next to the upper toothed belt wheel and de-
termines its alignment. In long arm machines, the winder wheel is fastened
farther away in the center of the arm.
Order
• Always check the position of the other toothed belt wheel after making a
change on either of the toothed belt wheels.
Differences between long arm machines and machines with normal
lengths
In long arm machines, the winder wheel on the driver wheel is aligned in
the center of the arm ( p. 64). It is irrelevant for the toothed belt wheels.
Therefore, in long arm machines, it does not matter which toothed belt
wheel you check first.
In machines with normal lengths, the position of the upper toothed belt
wheel is defined by the distance to the winder wheel.
Important
Therefore, you must first align the upper toothed belt wheel on the winder
wheel and then align the lower toothed belt wheel so that the toothed belt
runs correctly over both wheels.
6.1 Positioning the upper toothed belt wheel
Proper setting
The 2 threaded pins for the upper toothed belt wheel are seated flush on
the flat.
Information
Additional checks for machines with normal lengths:
The distance between the winder wheel and the upper toothed belt wheel
is 0.8 mm.
WARNING
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before you position the
upper toothed belt wheel.
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