To check the brake, a measurement is made of the air gap between magnet body and anchor plate, as well as the brake lining thickness.

Overview:

Due to the wear of the brake lining as the motor is braked, the brake rotor gradually becomes thinner. The anchor plate is thereby pressed ever further toward the brake rotor during braking and the air gap thus becomes wider. If the air gap has reached its maximum width, a gap limiter prevents the anchor plate from being pressed any further, thus ensuring that the anchor plate is reliably ventilated. When the gap limiter is employed, the braking effectiveness gradually lessens.

This is the point at which the air gap must be readjusted at the latest. If the minimum lining thickness has been reached, the brake rotor must be replaced.

If the width of the air gap is within the permitted range but usage behaviour leads to the expectation that the air gap will be wider than permitted before the next regular inspection, the air gap must be readjusted now.

   Release the bayonet nuts.

   Detach the connection cable and control cable.

   Unscrew the motor cover from the housing.

●   The fillister-head screws are secured by O-rings and thus do not fall out of the motor cover.

   Detach the couplings of the hoist motor and brake from the control in the motor cover.

   Pull off the dust guard ring.

  Insert the feeler gauge next to one of the hexagon head screws in the air gap between magnet body and anchor plate and measure the distance.

If the air gap has reached the maximum width of the operating range, adjust the brake. See page 64.

If the width of the air gap is within the permitted range but usage behaviour leads to the expectation that the air gap will be wider than permitted before the next regular inspection, the air gap must be readjusted now.

   Repeat the steps for all hexagon head screws (3x).

   Clean the entire brake with compressed air.

   Check the thickness of the brake lining with a calliper.

   If the brake rotor is thinner than permitted, replace the brake rotor. See page 69.

   Pull the dust guard ring over the brake.

   Attach the couplings of the hoist motor and brake to the pin multipoint connectors of the control in the motor cover.

Only connect couplings and pin multipoint connectors of identical colour (orange and grey).

For the assignment, see page 92.

   With electronic hoist limit switch: Insert the connector on the hoist limit switch PCB.

   Hold the motor cover on the housing.

   Note the different screw lengths and screw in the fillister-head screws.

   Insert the bayonet coupling of the connection cable and the bayonet connector of the control cable. Due to a notch, the plug-in connections will only fit together in one position.

   Slide on and tighten the bayonet nuts.