Installing the slewing stops

Only with slewing stops on the slewing crane with a cylindrical pillar cap (sizes 273 to 558)

 

The slewing stops are screwed to the left and right of the jib arm onto the top plate of the pillar. The top plate has threaded holes for this in 15° increments.

 

Slewing stops

─    

Size	Slewing range from	Slewing range to
VS273 and VS323	0°	240°
VS355 to VS558	0°	255°

Slewing range when there are two slewing stops at 15° increments.

─            

 

Slewing stop
Jib arm

 

Size	Slewing range	Dead zone
VS273 and VS323	285°	75°
VS355 to VS558	300°	60°

Slewing range when there is a slewing stop at 15° increments.

 

Limitations:

─     VS273 and VS323: the slewing range cannot be limited between 240° and 285°, nor beyond 285°.

─     VS355 to VS558: the slewing range cannot be limited between 255° and 300°, nor beyond 300°.

 

 

Head plate	Safety buffer
Rib screw	Buffer mount

    Screw the safety buffer into the buffer mount.

    Slew the jib arm until it is just a few degrees before the end of the desired slewing range (e.g. before reaching an obstacle or the building wall).

    Hold the slewing stop at the most suitable screw holes.

    Screw the slewing stop in place using rib screws (3x each). 115 Nm.

Size	Rib screws (3x)
VS273	M12x25
VS232 to VS457	M12x30
VS558	M12x45

 

 

Only with slewing stops on a jib crane with conical pillar cap (size 660 and 762)

 

The slewing stops are screwed in place on the left and right sides of the pillar.

 

Jib arm
Slewing stop

─    

Size	Slewing range from	Slewing range to
VS660	0°	270°
VS762	0°	240°

Stepless slewing range when there are two slewing stops

 

 

Slewing stop

 

Size	Slewing range	Dead zone
VS660	290°	70°
VS762	280°	80°

Slewing range when there is one slewing stop

 

Limitations:

─     VS660: the slewing range cannot be limited between 270° and 290°, nor beyond 290°.

─     VS762: the slewing range cannot be limited between 240° and 280°, nor beyond 280°.

 

 

Safety buffer	Jib bracket
Buffer mount	Buffer plate

    Temporarily screw the safety buffer (in order to position it) into the buffer mount.

    Slew the jib arm until it is just a few degrees before the end of the desired slewing range (e.g. before reaching an obstacle or the building wall).

    Hold the buffer mount against the pillar at the same height as the buffer plate.

    Mark the position of the buffer mount and the position of the holes on the pillar.

 

 

Buffer mount	Fillister-head screws

    Drill holes in the pillar at the positions marked, and cut threads.

The holes must be drilled into the pillar vertically. They must not be drilled into the pillar at an angle.

Size	Thread	Number of buffer mount
VS660	M10	6x
VS762	M16	8x

 

 

    Screw the safety buffer out of the buffer mount.

    Screw the buffer mount in place using fillister-head screws.

Size	Thread	Tightening torque
VS660	M10	50 Nm
VS762	M16	210 Nm

    Screw the safety buffer back into the buffer mount.