Operation, Calibration & Service Manual
LinkBelt - DS350 1334 Console
Failure to re-position t he ant i t wo-block sw itch w eight w ill pr event t he ov er hoist sy stem f rom
functioning properly. No weight shall be on t he m ain hoist ant i t wo-block sw itch w hen t he boom
extension is being used.
Fig. 1
:
Setting of Anti Two-Block Retainer in
Locking Position
Fig. 2
:
Retainer in Locking Position
6
PRE-OPERATION INSPECTION AND CALIBRATION VERIFICATION
Before operating the crane, the following electrical connections must be checked to ensure that the
system is properly connected for the crane configuration.
If the crane works only with the boom and without boom extension or jib, check bypass plug(s) and
the weight on the anti two-block switch(s) is properly installed on the hoist load line(s). With even
parts of hoisting line, the weight shall be attached to the dead-end line. With odd parts of hoisting line,
the weight shall be attached to the line of lowest speed.
If the crane works with boom extension or jib, the connecting cable shall be installed between the
junction box on the boom extension and the boom junction box. The weight attached to the main hoist
anti two-block switch shall be removed. In that case the anti two-block switch has to be locked with
the red Anti Two-Block Retainer, which is fixed with a red lanyard at the anti two-block switch
(described on the next pages). Then the weight shall be reattached to the boom extension anti two-
block switch.
Installation of Anti Two-Block Retainer in Locking Position Procedure (see Fig. 1 and 2):
1. Pull the cable out of the switch and bend back parallel to the boom and hold (1).
2. Slide the retainer from left side with its slot over the cable between the crimped stop and the switch
(2). Push it firmly straight onto the cable guide of the Anti Two-Block switch (3).
3. Straighten the cable completely into the slot and release the cable (4).