Leister UNIROOF 300, Manual, Page: 14 / 59

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Allow the device to cool down in cool-down mode.
Before beginning with dismantling work, make sure that
the device has been switched off at the
main switch (19) and that the power supply cord (1) is disconnected from the power supply.
To retool to a different welding width, proceed in accordance with the sequence described below.
Step 1: Safety precautions
5.5 Retooling for different welding width
1. Undo the two M4 x 12 cheese-head screws.
2. Remove the cover plate.
3. Replace the intermediate rings of the drive/pressure roller (8) and the
press-down belt (26) .
4. Mount the cover plate.
5. Retighten the two M4 x 12 cheese-head screws.
Step 2: Adjusting the roller width (analogous to the 20-, 30-, or 40-mm welding nozzle)
Cheese-head screw M4 x 12
Intermediate ring drive/pressure roller
Intermediate ring drive/pressure roller
Intermediate ring for press-down belt
Cover plate
40 mm drive/pressure roller (8)