Replacing the brake rotor

 

If the brake rotor on the chain hoist is thinner than permitted, the brake rotor must be replaced.

 

 

Removing the chain box

 

Bolt

 

Chain box

*   Release the SL safety clip(s) (1x or 2x) from the bolt.

*   Hold the chain box firmly and pull out the bolt(s) (1x or 2x).

*   Remove the chain box.

 

 

Opening the chain hoist

Bayonet nut

Motor cover

*   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.

 

 

Uncovering the brake

Dust guard ring

 

*   Pull off the dust guard ring.

 

 

Disassembling the magnet body

 

Hexagon head screws

Magnet body

 

*   Disconnect the power supply of the magnet body.

*   Release the hexagon head screws M6x70 (3x).

*   Pull the magnet body from the motor shaft.

 

 

Removing the old brake rotor

Brake rotor

Hub

 

Friction disc

*   Pull the brake rotor from the hub.

●   The friction disc lies loosely against the brake bearing shield.

*   Do not remove the friction disc.

 

 

Installing the new brake rotor

Hub

Brake rotor

 

Friction disc

*   Check whether the friction disc is still lying on the brake bearing shield.

*   Push the new brake rotor onto the hub.

 

 

Mounting the magnet body

*   Slide the magnet body onto the motor shaft.

*   Screw on the hexagon head screws (3x). 7 Nm.

*   Then the air gap must be readjusted. See page 64.

*   Connect the power supply of the magnet body.

 

 

Covering the brake

Dust guard ring

 

*   Pull the dust guard ring over the brake.

 

 

Connecting the chain hoist

*   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.

 

 

Closing the chain hoist

Long fillister-head screws

Short fillister-head screw

Bayonet coupling

Motor cover

*   Hold the motor cover on the housing.

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

 

Size

Size and length

Number

Tightening torque

GM2

M5x65

3x

4 Nm

GM2

M5x45

1x

4 Nm

GM4

M5x60

3x

4 Nm

GM4

M5x50

1x

4 Nm

GM6

M8x110

3x

15 Nm

GM6

M8x60

1x

15 Nm

GM8

M10x95

3x

20 Nm

GM8

M10x50

1x

20 Nm

*   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.

 

 

Only for GM2, GM4 and GM6 (GM6 with plastic chain box)

The illustrations show a chain box being installed on the GM6 chain hoist. Installation on a GM2 or GM4 chain hoist is very similar.

 

Installing the chain box

Bolt

SL safety clip

 

Chain box

*   Place the chain in the chain box.

*   Turn the chain box as shown in the figure (slanted side facing outward).

*   Use the bolts to install the chain box on the chain hoist.

─     For GM2: Use a bolt to fix the chain box to the chain hoist.

─     For GM4 and chain box with one hole: Use a bolt to fix the chain box to the chain hoist.

─     For GM4 and chain box with two holes: Use a bolt to fix the chain box to the chain hoist. Use the inner holes of the chain box. The outer holes remain free.

─     For GM6 and plastic chain box: Use two bolts to fix the chain box to the chain hoist.

*  Secure the bolts with the SL safety clips (1x or 2x).

 

 

Only for GM8

 

Attach buffer

 

Suspension straps

Buffer

Bolt

*   Turn the buffer as shown in the figure (rounded side facing inward).

*   Push the buffer between the suspension straps on the chain hoist.

*   Push the short bolt through the outer holes of the suspension straps and the buffer.

 

 

Only for GM6 (GM6 with chain box with metal frame) and GM8

The illustrations show a chain box being installed on the GM8 chain hoist. Installation on a GM6 chain hoist is very similar.

 

Installing the chain box

Inner hole

Bolt

Chain box

SL safety clip

*   Place the chain in the chain box.

*   Turn the chain box as shown in the figure (bar facing outward).

*   Use the bolts to install the chain box on the chain hoist.

─     For GM6 and chain box with metal frame: Use a bolt to fix the chain box to the chain hoist. Use the inner holes of the suspension strap. The outer holes of the suspension strap remain free.

─     For GM8: Use a bolt to fix the chain box to the chain hoist. Use the inner holes of the suspension strap. The buffer is fixed to the outer holes of the suspension straps.

*  Secure the bolts with the SL safety clips (2x).