PREVOST BAL-F Manuel D'utilisateur page 21

ATTENTION: avant de proc r à toute vérification, s'assurer que le ressort est effectivement
déchargé.
ATTENTION - DANGER: ne pas ouvrir le tambour et/ou ne pas essayer de remplacer le ressort, pour
quelque raison que ce soit; cette opération est très dangereuse et peut causer de graves blessures.
ATTENTION - DANGER: éliminer le tambour contenant le ressort cassé conformément aux normes
en vigueur; NE PAS l'abandonner ni l'éliminer avec d'autres déchets et/ou débris car son ouverture,
même accidentelle, est TRES DANGEREUSE et peut causer de graves blessures.
Utiliser uniquement des pièces détachées d'origine PREVOST. Pour la commande de pièces détachées,
le client est prié de s'adresser au fournisseur de l'appareil ou directement au constructeur, en indiquant les
éléments d'identification de la machine figurant sur la plaque signalétique.
GB
This part of the manual is intended for maintenance personnel ONLY
CERTAIN OPERATIONS OUTLINED IN THIS SECTION ARE VERY DANGEROUS AND COULD
INJURE PEOPLE IF PERFORMED BY UNSKILLED PERSONNEL.
REFER TO THE OPERATING MANUAL TO INSTALL, ADJUST AND USE THE BALANCER.
Maintenance
The balancer's dimensioning is such that it is maintenance-free for its entire work life. But if it is used under
particularly harsh conditions and requires any interventions, ensure that the spring-drum group (13) is
unloaded before disassembling the balancer.
The spring is the balancer's only dangerous component. It is housed inside the drum (13) that is lubricated
for life. The spring-drum spare part (13) is supplied complete: do not remove the spring for any reason
whatsoever.
Do not disassemble the spring group as this is a dangerous operation.
Removing and inspecting the balancer
- Remove the screws (40); raise the cap (5); unwind the cable completely (14); remove the shaft (11) using
a plastic hammer if need be;
- Inspect the spring-drum group (13): if the internal spring is broken or the cable guide groove is damaged,
replace the whole group. The spring-drum group (13) is supplied assembled, lubricated and complete with
bearings. Never open it for any reason whatsoever;
- Check the cable (14): replace it if is has the defects shown in (Fig.7);
- Inspect the disc's centrifugal weights (9) (they should be free to move) and the springs (37) that must be in
perfect condition and must ensure that the centrifugal weights return. Check that the cap (5) is not damaged
where the centrifugal weights act;
- The centrifugal safety disc is completely assembled (9) when supplied. The only available spare parts are
the springs (37);
- Check the working efficiency of all the shutter kinematics (8 and 38), check the screw (45) and the pin (43)
(they should slide axially and turn) and the working efficiency of the springs (6-42).
BALANCER MAINTENANCE
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