BA_WP_SPM2-1000_EN_28-22.docx
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19.8
Changing and Tensioning the Drive Belt
Switch off the machine during belt replacement and retensioning and secure it against
unauthorised restarting! Lock the main switch with a padlock!
The drive belt should be replaced in the event of excessive wear, frayed flanks, traces of oil, porosity or if cross-
sectional fractures are present. Only use belts of the same type that you are replacing. The exact type designation
is printed on the drive belt.
Figure 33: Changing and retensioning the belt
Retension belt:
•
Switch off the main switch and lock it.
•
Open service door (
T
), see
•
Now loosen the clamping lever (
H
).
•
Push the motor down with the swivel lever (
S
) around
the axis of the lever (
H
) until the correct belt tension is
reached. The procedure for checking the belt tension
is described in detail in section
•
Then tighten the clamping lever (
H
) again.
Replace belt:
•
Switch off the main switch and lock it.
•
Open service door (
T
), see
•
Now loosen the clamping lever (
H
).
•
Lift the motor with the swivel lever (
S
) so that the old belt can be removed
•
Then put on the new belt and move the motor back to its original position.
•
Then tighten the clamping lever (
H
) again.
•
Now check the V-belt tension according to section
•
If necessary, retension as described above next to
19.8.1
Checking the Drive Belt Tension
The correct pretension of the drive belt can be checked
as follows:
1.
Press the drive belt (in the middle between the two
belt pulleys) from above with a strong thumb pres-
sure (approx. 2 kg).
2.
With correct pretension, the belt must only be able to
be pushed downwards (
X
) by max. 5 mm.
3.
If a new belt is installed, it must only be possible to
push it downwards (
X
) by max. 2 mm.
Figure 34: Checking the belt tension
Too low belt tension leads to increased wear or failure of the belt.
Excessive belt tension can cause bearing damage to the drive axes.
19.9
Maintaining the Drive Belt
Contamination of the drive belt with oil, grease, solvents, paint, etc. must be avoided. Clean and dry the belt and
pulley channels only with a soft brush or a clean cotton or paper towel. Do not use solvents or similar cleaning
agents and never use water.
H
S
X
