Installing the adjustable brake

Depending on the crane design, an adjustable brake is now installed. It may be necessary to install a guard plate.

 

The adjustable brake allows the slewing resistance of manually slewed cranes to be adjusted, and the crane can be braked.

 

Only with a jib crane with adjustable brake

The figures show the installation of the adjustable brake on the jib crane up to size 457. Installation on larger jib cranes is, essentially, no different.

 

Installing the fork

Fork

Fillister-head screw

 

Roller box

*    Screw the fork onto the side of the roller box.

Size

Number

Fillister-head screw

Tightening torque

273

4x

M10x20

20 Nm

323 - 457

4x

M12x20

35 Nm

558 - 660

8x

M12x25

35 Nm

762

8x

M16x25

80 Nm

 

 

Installing the brake band

Fillister-head screw with spring lock washer

 

 

Brake band

*    Place the brake band around the thrust ring.

*    Screw the brake band onto the roller box on the side opposite the guidance device.

Size

Number

Fillister-head screw

Tightening torque

273

4x

M10x20

20 Nm

323 - 457

4x

M12x20

35 Nm

558 - 660

8x

M12x25

35 Nm

762

8x

M16x25

80 Nm

 

 

Fork

Guidance device

Fillister-head screws

 

*    Push the brake band into the fork on the same side as the guidance device.

*    Screw it in place by hand from above and below using fillister-head screws and spring lock washers.

Size

Number

Fillister-head screw

Tightening torque

273

2x

M10x20

45 Nm

323 - 558

2x

M12x25

70 Nm

 

 

Installing the chain

Reel wheel

 

Chain

 

*    Pull the chain through the reel wheel.

*    Connect both ends of the chain to each other using a C-shaped chain link.