Maintenance and care
30
Ribbed V-belts
Checking condition
D Check ribbed V-belts (poly-V-belts) for cracks, fouling by oil, overheating and wear
D Replace damaged ribbed V-belts
Checking tension
D Attach setting gauge À over bolt heads
of spring mounting. The pretension on
the automatic belt tensioner is correct
when the setting gauge can be at-
tached over the bolt heads
D Tension ribbed V-belt if necessary
Tensioning ribbed V-belt
D Grip tensioning element with wrench at
hexagon À firmly and release mount-
ing bolts Á
D Increase spring pretension at hexagon
with wrench until the setting gauge can
be fitted over the bolt heads Â
(
A
= 91,5±1 mm)
D Tighten down mounting bolts to 35 Nm
D It must be possible to detach the set-
ting gauge without the use of force
1
1
2
3
A
Replacing ribbed V-belt
D Remove fan
D Grip tensioning element with wrench at hexagon À firmly and release mounting
bolts Á
D Relieve tension on ribbed V-belt slowly and remove
D Fit a new ribbed V-belt
D Tension ribbed V-belt
Note:
To avoid damaging the damper unit, it is important that the damper be released
and tensioned slowly. Do not under any circumstances allow the damper to
bounce back as this would damage the damper. Check the damper for oil leaks
while it is released.
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