Beisler 1265-4 - Manual (Page 50)

Service Instructions Automatic Single-Head Serging Machine 1265-4 Beisler GmbH
C-14
C.5
Maintenance
C.5.6 Replacing the roller toothed belt
1. Lower the transport unit manu-
ally onto the working plate as
described in Section D, Pro-
gramming Instructions.
2. Switch the machine off.
3. Fig. 5: Unscrew the pressure
cylinder rod 1 from the lower
suspension.
4. Slacken the toothed belt 4 by
loosening the Allen screw 6
at the bearing and pushing the
spacer shaft 2 with the trans-
port rollers up.
4. Lift the toothed belt out of the
drive roller and remove it over
the transport rollers.
5. Install the toothed belt to the
sliding rollers and to the drive
roller. Pretension the belt by
pushing the spacer shaft with
the transport rollers down and
tightening the Allen screw 6.
If the pretensioning is correct,
it must be possible to depress
the center of the belt approx 10 mm while counterpressure is felt.
NOTE - Transport roller orientation
After the toothed belt has been replaced, the distance bet-
ween the transport rollers and the working plate must be
checked.
C.5.7 Adjusting the transport rollers
Fig. 5: The transport rollers of the puller 9 and of the roller 2 should
contact the working plate with slight pressure in the lowered position
(i.e. distance must be zero in the lowered position).
The pressure that the transport rollers apply to the working plate is con-
trolled by a pressure reducer (see Section C.12)
Setting the distance between transport rollers and working plate:
1. Lower the transport unit manually onto the working plate as descri-
bed in Section D, Programming Instructions.
2. Switch the machine off.
3. To avoid contact between the working plate and the transport rollers,
adjust the position of the pressure cylinder clamps 4 and 8 on
the corresponding spacer shaft 5 and 7:
• Loosen the clamp locating screw and shift the clamp on the spa-
cer shaft. Slide clamp up to reduce the distance, slide clamp
down to increase the distance.
Fig. 5