Page 32 of 36 A80H0321
Brake disc replacement
Please verify that the type of brake disc is suitable for the application and in particular verify if it's need to be
used a K brake disc (e.g. liftings, safety applications, cranes and so on). For further details pls contact MGM
motori elettrici SpA.
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).
Remove the brake cover (26)
as described in the relevant paragraph.
Take off the brake coil (25) from the brake
adjusters (19), remove the nuts (20) and the springs (18). Remove the brake moving element (24) sliding it through the
brake adjusters (19). Take off the old brake disc (23) and put in the new one.
Verify that the new brake disc is properly inserted in the correct way.
For motors with k brake discs, the disc must be inserted with the hub longest segment pointing towards the
brake friction surface (as shown below).
The new brake disc must be handled with clean hands, because even a small trace of grease will decrease the
braking performance and also increase noise.
After having mounted the brake coil (25), proceed to the airgap adjustment (see the pertinent paragraph).
For re-assembling, proceed backwards.
Brake coil replacement
Remove the brake cover (26)
as described in the relevant paragraph
, disconnect the brake coil (25) connectors.
Unscrew the locknuts (22) and pull off the brake coil (25) from brake adjusters (19 o 42). Reassemble the new brake
coil on the brake adjusters (19 o 42) and reconnect the electrical connectors.
Pay attention to place the electrical connectors in the right position so that to allow their insertion.
Before reassembling the brake cover (26) and the nuts verify that the connections and relative cables are property
tightened.
Proceed with the air gap adjustment as stated in the respective paragraph.
