Maintenance and care
31
V-belts
Checking condition
D Check V-belts for cracks, oil, overheating and
wear
D Change demaged V-belts
If, in the case of a multiple belt drive, wear or diffe
ring tensions are found, always replace the com
plete set of belts.
Checking tension
Use V-belt tension tester to check V-belt tension.
D Lower indicator arm (1) into the scale
D Apply tester to belt at a point midway between
two pulleys so that edge of contact surface (3)
is flush with the V-belt
D Slowly depress pad (2) until the spring can be
heard to disengage. This will cause the indica
tor to move upwards
If pressure is maintained after the spring has
disengaged a false reading will be obtained!
Reading of tension
D Read of the tensioning force of the belt at the
point where the top surface of the indicator arm
(1) intersects with the scale
D Before taking readings make ensure that the
indicator arm remains in its position
If the value measured deviates from the setting
value specified, the V-belt tension must be correc
ted.
1
2
3
Drive belt
width
Tensioning forces according to the
kg graduation on the tester
New installation
When ser
vicing after
long run
ning time
Installation
After 10
min. run
ning time
2/3VX 90-100 70-80 60
3/3VX 135-150 105-120 90
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