TECNA 9422 Manuel D'utilisation page 20

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 size is such that it is maintenance-free for its entire work life. However, if it is used under particularly harsh conditions and
requires any interventions, ensure that the spring-drum group (14) is discharged before disassembling the balancer.
The spring is the balancer's only dangerous component. It is housed inside the drum (14) that is lubricated for life. The spring-drum spare
part (14) 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 (42); raise the cap (6); unwind the cable completely (15); disassemble the disk (11); remove the shaft (13) using a
plastic hammer if need be;
- Inspect the spring-drum group (14): if the internal spring is broken or the cable guide groove is damaged, replace the whole group. The
spring-drum group (14) is supplied assembled, lubricated and complete with bearings. Never open it for any reason whatsoever;
- Check the cable (15): replace it if is has the defects shown in (Fig.7);
- Inspect the disc's centrifugal weights (11) (they should be free to move) and the springs (39) that must be in perfect condition and must
ensure that the centrifugal weights return. Check that the cap (6) is not damaged where the centrifugal weights act;
- The centrifugal safety disc is completely assembled (11) when supplied. The only available spare parts are the springs (39);
- Check the working efficiency of all the shutter kinematics (9 and 40), check the screw (44) and the pin (46) (they should slide axially and
turn) and the working efficiency of the springs (7).
Balancer assembly:
- Check that the stop (L) is free to move;
- Tighten the screw (16) at the end of the cable (15) with a torque of 20 Nm;
- Lubricate the cable, wind it in the drum's helical slots (14), carefully insert it in the stop (L) and assemble;
- Tighten the screws (41) of the safety disc (11) with a torque of 5 Nm;
- Fit the cap (5) on the shaft (13), couple it to the cap (17) and close carefully. Tighten the screws (42) with a torque of 3 Nm;
- Once done, charge the spring of the group (14) with the screw (44). Keep the shutter (9) raised, using the lever (5), until the screw head
(44) re-enters the cap 6 (Fig. 5);
- Install the balancer adhering to the directions supplied in the "Balancer operating manual".
Spring drum breakage
- If the balancer is blocked, check that the drum spring is not discharged (condition that blocks the balancer as if the spring were broken).
If you are unable to charge the balancer by adhering to the procedure described in paragraph "Balancer adjustment", this means that the
drum spring is probably broken.
WARNING: ensure that the spring is charged before carrying out any type of check.
WARNING - DANGER: DO NOT open the drum and/or attempt to replace the spring for any reason whatsoever. This operation is
extremely dangerous and could seriously injure anyone.
WARNING - DANGER: dispose of the drum containing the broken spring in compliance with prevailing regulations. DO NOT dump
it together with other waste or scrap since opening it, even accidentally, is VERY DANGEROUS and could seriously injure anyone.
Use original TECNA S.p.A. spare parts only. When requesting spare parts, the Customer should kindly contact the supplier of the
balancer, or the manufacturer directly, specifying the machine's identification data printed on the plate.
BALANCER MAINTENANCE