Setting the air gap on the brake

If the air gap is wider than permitted, it must be readjusted.

 

Overview:

Air gap (between magnet body and anchor plate)

Brake lining thickness

Magnet body and anchor plate

Brake rotor with brake lining

 

Dimension

Value

Air gap between anchor plate and magnet body

Between 0.4 mm and 1.1 mm

Target value for air gap

0.4 mm

 

Size

Brake lining thickness (minimum) [mm]

Hoist motor L6

Hoist motor H6

Hoist motor U6

800.4

9.3

9.3

9.3

1000.7

9.3

9.3

11.3

2000.3

9.3

11.3

-

3000.4

11.3

12.3

-

5000.3

12.3

13.8

-

6000.3

13.8

-

-

7000.1

-

13.8

13.8

 

 

As soon as the hoist motor stops running, the anchor plate presses against the brake rotor through spring force, braking the hoist motor. An air gap is created between the magnet body and the anchor plate. When the hoist motor starts up, the magnet body pulls the anchor plate away from the brake rotor and the hoist motor can rotate freely again.

 

If the brake lining is worn, the air gap will be larger. See Inspecting the brake on the hoist drive. If the air gap is larger than the maximum permitted, the brake must be readjusted. If the brake lining on the brake rotor is worn too thin, it must be replaced. See Replacing the brake rotor on the hoist drive.

 

 

Taking off the fan cover

Fan cover

Rib screws

*    Unscrew the rib screws (3x) of the fan cover.

*    Take off the fan cover.

 

 

Only for fan blades on the motor shaft

 

Removing the fan blade

Circlip

 

Fan blade

 

*    Remove the circlip.

*    Remove the fan blade.

 

 

 

Only for auxiliary fans without frame

 

Schaden

Do not allow the auxiliary fan to hang from the connection cable!

If the auxiliary fan hangs from the connection cable, it could break.

If present, unplug the plug-in connection so that the auxiliary fan can be laid aside during the assembly. If no plug-in connection is present, leave the auxiliary fan connected and secure it after removal (e.g. with a lashing strap).

 

 

 

Plug-in connection

Hexagon head screw

 

*    If present: Unplug the plug-in connection from the auxiliary fan.

*    Release the hexagon head screws (3x) on the auxiliary fan and remove the auxiliary fan.

*    If the auxiliary fan does not have a plug-in connection: Leave the auxiliary fan connected and secure it on the hoist motor, e.g. with a lashing strap.

 

 

 

Only for auxiliary fans with frame

 

Schaden

Do not allow the auxiliary fan to hang from the connection cable!

If the auxiliary fan hangs from the connection cable, it could break.

Unplug the plug-in connection so that the auxiliary fan can be laid aside during the assembly.

 

 

Plug-in connection

 

Fillister-head screw

Mount

*    Unplug the plug-in connection from the auxiliary fan.

*    Release the fillister-head screws (2x) on the auxiliary fan and remove the auxiliary fan.

 

 

 

Uncovering the brake

O-ring

 

*    Remove the O-ring.

*    Clean the entire brake with compressed air.

 

 

Setting the air gap

Magnet body

Banjo bolt

Hexagon head screw

Feeler gauge

*    Unscrew the hexagon head screws (3x) by a half turn.

*    Screw in the banjo bolts (3x) by a half turn in the direction of the magnet body.

*    Read off the nominal width of the air gap from the table.

 

Dimension

Value

Air gap between anchor plate and magnet body

Between 0.4 mm and 1.1 mm

Target value for air gap

0.4 mm

 

Size

Brake lining thickness (minimum) [mm]

Hoist motor L6

Hoist motor H6

Hoist motor U6

800.4

9.3

9.3

9.3

1000.7

9.3

9.3

11.3

2000.3

9.3

11.3

-

3000.4

11.3

12.3

-

5000.3

12.3

13.8

-

6000.3

13.8

-

-

7000.1

-

13.8

13.8

 

 

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

*    Tighten the hexagon head screws so that the feeler gauge can still be pulled from the air gap.

●   The air gap on this hexagon head screw is now adjusted to the set width.

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

 

 

Concluding the setting of the air gap

 

Banjo bolt

Torque wrench

 

*    Screw the banjo bolts (3x) in the direction of the hoist motor until hand-tight.

*    Screw on the hexagon head screws (3x).

 

Hexagon head screw

Tightening torque

M6x70

10 Nm

M8x80

25 Nm

M8x90

25 Nm

M8x100

25 Nm

 

 

●   The brake is fixed with screws.

*    Check the air gap next to all three hexagon head screws. If different than the set width, repeat the adjustment.

 

 

Covering the brake

O-ring

 

*    Insert the O-ring.

 

 

Only for fan blades on the motor shaft

 

Fitting the fan blade

Circlip

 

Fan blade

 

*    Insert the fan blade on the motor shaft.

*    Insert the circlip.

 

 

 

Only for auxiliary fans without frame

 

 

Plug-in connection

Hexagon head screw M5x10

 

*    Place the auxiliary fan on the magnet body.

*    Bolt on the auxiliary fan with hexagon head screws M5x10 (3x).4,8 Nm.  Secure with thread-locking compound (medium tightness).

*    If necessary: Insert the plug-in connection from the auxiliary fan.

 

 

 

Only for auxiliary fans with frame

 

Plug-in connection

 

Fillister-head screw M4x16

Mount

*    Place the auxiliary fan on the mount.

*    Screw the auxiliary fan onto the mounting using fillister-head screws M4x12 (2x). 2,4 Nm. Secure with thread-locking compound (medium tightness).

*    Insert the plug-in connection from the auxiliary fan.

 

 

 

Closing the fan cover

Fan cover

Rib screws

*    Attach fan cover.

*    Screw in the rib screws (3x) of the fan cover.