adjustment (see the pertinent paragraph). For the flywheel (45) replacement on the BAPV series, follow up the specific
instructions.
Before replacing the brake disc it's always necessary to check the shaft splines wear, exactly where the disc
slides. If the shaft splines has a visible wear it's necessary to replace the rotor shaft (1).
Loosen the rear nut (27), remove the end cover (26), disconnect the brake coil (25). Unscrew the locknuts (22) and pull
off the brake coil (25) from brake adjusters (19). Reassemble the new brake coil on the brake adjusters (19) and
reconnect the electrical connectors. Pay attention to place the electrical connectors in the right position so that to allow
their insertion. Before reassemble the end cover (26) and the nuts verify that the connections and relative cables are
property tightened. Proceed with the air gap adjustement as stated in the respective paragraph. Verify that the brake coil
functions correctly; when the brake is energized, the brake coil (25) should attract the brake moving element (24) with a
quick stroke, and hold it without any vibration or noise. In case of any vibration, check that terminal connectors are
coupled correctly and tightly.
Loosen the rear nut (27), remove the end cover (26 or 48) and unscrew the locknuts (22). Take off the brake coil (25) from
the brake adjusters (19 or 42), remove the nuts (20-21) and the springs (18). Remove the brake moving element (24)
sliding it through the brake adjusters (19), remove the old brake adjusters and screw the new ones verifying their steady
fastening on the rear cover brake surface (17). After having screwed each brake adjuster (19 or 42) it's necessary to
check that its support bottom is completely leaned on the rear cover brake surface (17).
The air gap (60) i.e. the distance between the two magnetic cores of the brake coil (25) and the brake moving element
(24), must be as shown on table 1. It's strongly unadvisable to exceed these values in order to avoid vibrations of the
brake moving element, prominent noise, the burning of the brake coil or the brake assembly damaging.
It's advisable to check periodically the air gap, because by the wear of the brake disc linings, it tends to increase. Please
note that brake linings wear is greater during the run-in ( few thousands stops).
In order to set the airgap back to the required value, operate on the nuts (21-22) to obtain the brake coil forward
displacement towards the brake moving element (24). It's strongly recommended to avoid to tighten the locknut (22)
located on one brake adjuster (19, 42 for BAPV-BAF series motors) before having completed the positioning of the
brake coil (25) on all the brake adjusters. Therefore don't regulate the position of the brake coil adjusting the nut (21) on
one brake adjuster, if previously you didn't loose the locknuts (22) on all the brake adjusters (19, 42 for BAPV-BAF series
motors). This wrong operation could stress the air gap adjusters. Please verify that the airgap is uniform. The air gap
must be uniform to guarantee the right working and avoid mechanical stresses due to a wrong allignment. When the air
gap adjustment has been settled, the locknuts (22) should be tightened. For brake assembly with 6 brake adjusters (19,
42 for BAPV-BAF series motors), as first step regulate the brake coil position only on three brake adjusters at 120° by the
nuts 21-22. After having adjusted the position on these 3 brake adjusters, to complete the operation go on with the other
3 brake adjusters and first bring the air gap adjusting nuts (21) close to the brake coil and then tighten the locknuts (22).
When the operation has been settled, verify that the airgap is uniform and the nuts (21-22) are tightened.
Brake Coll Replacement
Air Gap Adjustment
Brake adjusters replacement
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