Bolting the tilted portal supports to the crane

 

On the tilted portal supports (not yet bolted on):

*    Comply with occupational health and safety requirements.

*    Raise a suitable lift platform (e.g. a lift platform with jib arm) to the outer cross head beam.

 

 

Bolting the tilted outer cross head beam onto the main girder

 

Clamp brace

 

Mounting plate

 

 

Only for cranes of size 280 and 350

 

*    Do not move, dismantle or damage the clamp braces in the cross head beam.

 

 

 

*    Place the mounting plate in the cross head beam and hold it so the hole pattern properly overlaps.

 

 

High-tensile bolt

 

*    Place the washers on the high-tensile bolts with the bevel (chamfered edge) to the head of the screw.

*    Insert the high-tensile bolts and washers from the outside into the screw holes and screw on so they are somewhat loose.

 

 

 

Central high-tensile bolt

Remaining high-tensile bolts

 

─     Only tighten high-tensile bolts with the appropriate torque wrench.

─     Do not use an impact wrench.

─     Do not tighten high-tensile bolts using turn-of-nut tightening.

*    Tighten the central high-tensile bolts on both sides (left and right on the outer cross head beam). Use a torque wrench to 300 Nm.

*    Next, tighten the remaining high-tensile bolts, alternating between left and right. Use a torque wrench to 300 Nm.

*    Then tighten all high-tensile bolts in the same sequence. Use a torque wrench to 450 Nm.

 

 

Note

 

Mark the high-tensile bolts with a permanent marker with a continuous line from the bolt head over the washer to the plate. This serves as proof that all high-tensile bolts have been tightened with tightening torque.

 

 

Aligning the diagonal brace

If the hole patterns of the inner cross head beam and the diagonal brace do not exactly match up:

 

The diagonal brace can be aligned with the adjustable assembly cross brace. A hexagonal nut is supplied for each direction.

 

A-frame

Diagonal brace

Hexagonal nut for aligning the diagonal brace

Hexagonal nut for aligning the diagonal brace

*    Release the opposite-lying hexagonal nut (the one not required to adjust for the respective direction) by unscrewing it several turns.

*    Then screw the corresponding hexagonal nut toward the diagonal brace.

●   Since the A-frame is already screwed tight, turning the hexagonal nut will serve to shift the diagonal brace.

*    Keep turning the hexagonal nut until the hole patterns match up exactly.

 

 

Bolting the diagonal braces under the inner cross head beam

 

Inner cross head beam

 

 

Diagonal brace

*    Screw the diagonal brace to the inner cross head beam on both sides with the four M16x40 rib screws. 300 Nm.

Only for 350 mm trolley:
Screw the diagonal brace to the inner cross head beam on both sides with the six M16x40 rib screws. 300 Nm.

─     Only tighten rib screws with a suitable torque wrench.

─     Do not use an impact wrench.

─     Do not tighten rib screws using turn-of-nut tightening.