DURKOPP ADLER 969 Classic, Service Instructions Manual

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Setting the drive
Service Instructions 969 - 06.0 - 03/2019 27
6 Setting the drive
6.1 Setting the drive ratio (Classic)
The machine is equipped with a 2-step pulley, which can be used to adjust
the drive ratio between the drive motor and the machine, and increase
the penetration force of the needle.
In order to change the ratio, the drive belts must be disassembled and
the pulley changed to the opposite position. The drive belt is then refitted
and tensioned.
Cover
• Belt cover ( 
p. 17
)
6.1.1 Disassembling the V-ribbed belt
Fig. 15: Disassembling the V-ribbed belt
To disassemble the V-ribbed belt:
1. Loosen the screws (4).
2. Rotate the tensioning roller (2) and belt tensioner (3).
3. Remove the V-ribbed belt (1).
CAUTION
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before setting the drive.
(1) - V-ribbed belt
(2) - Tensioning roller
(3) - Belt tensioner
(4) - Screws
①
②
③
④