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Maintenance
8.2.5 Stem
The stem and quick release system should be
inspected at regular intervals. The specialist dealer
should adjust them if necessary.
If the hexagon socket head screw is also loosened,
the headset backlash also needs to be adjusted.
Medium-strength thread locker, such as Loctite
blue, then needs to be applied to the loosened
screws and the screws tightened as per the
instructions.
Check for wear and signs of corrosion (maintain
with an oily cloth) and for oil leaks.
8.2.6 Checking the chain and belt tension
NOTICE
Excessive chain or belt tension increases wear.
If the chain or belt tension is too low, there is a risk that
the chain or belt will slip off the chain wheels.
Check the chain or belt tension in three or four
positions, turning the crank a full revolution.
The ideal chain or belt tension has been achieved
if the chain or the belt can be pushed a maximum of
2 cm in the middle between the pinion and the
toothed wheel. The crank must also turn without
resistance.
Check the chain and belt tension once a month.
If the chain or the belt can be pushed more than
2 cm, you need to have the chain or belt tensioned
again by the specialist dealer.
If the chain or belt can only be pushed up and down
less than 1 cm, you will need to slacken the chain or
belt slightly.
EN_034-11592_1.0_0.01_19.08.2018_HERCULES BOSCH Purion MY19_Inhalt.book Seite 139 Montag, 19. November 2018 11:00 11
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