Limiting Chain And Automatic Release; Limiting Chain - probst SG-80-PGL2 Operating Instructions Manual

Operation
3.) Tighten screws by hand.
Ill. 4
5.) Tighten lock nuts with the corresponding open-end-
spanner.
Ill. 6
6.4

Limiting chain and automatic release

6.4.1

Limiting chain

The position of limiting chain (2) is between the upper crossbar of the device and the automatic release (1).
This limiting chain (2) avoid that the rubber grippers (without gripping good) can not close complete
(minimal opening range).
•
When driving very fast over uneven ground with the lifting machine (excavator), having the Scissor Grab
SG hanging on the open position on the lifting arm, the SG will "jump" up and down.
•
In this case, it could happen, that the automatic release (1) will accidently be unhocked, the SG will close
until the limiting chain (2) will stop the movement of the grippers towards one another at a certain
distance.
•
Due to the high dynamic forces in such an unlikely case, the limiting chain (2) and/or the fixing screws
can be overloaded.
•
Therefore the limiting chain (see 2 in Ill. A) and the fixing screws (see A1 and A2 in Ill. A) have to be
exchanged in such a case, also the correct function of the rotation break (Ill. E) must be checked (see
Ill. F, G, H).
•
Order-No. for spare part-limiting chain and rotation break see spare parts list.
5310.0380
4.) Tighten screws with the corresponding open-end-
spanner.
Ill. 5
6.) Now the net hooks are ready for use→ Ill. 7
Ill. 7
V10
20 / 26
GB