Operator's Manual
DS 350 / 1334
© PAT
Rev. D 04/12/02 CSH
190072_d.DOC
40
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.
Machines with only a Main Hoist
If the crane works only with the boom and without boom extension, no additional connections are
necessary. However, be sure the weight of the anti two-block switch is properly installed on the main
hoist load line. 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, 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 pages 40 and
41). Then the weight shall be reattached to the boom extension anti two-block switch.
Failure to re-position the anti two-block switch weight will prevent the over hoist system from
functioning properly. No weight shall be on the main hoist anti two-block switch when the boom
extension is being used.
Machines with Main and Auxiliary Hoists
If the boom extension is not in the operating position, the by-pass plug shall be installed in the main boom
junction box. The weight of the main hoist anti two-block switch shall be installed.
If the boom extension is in the operating position, the connecting cable shall be installed between the
junction boxes on the boom extension and the main boom. Weights shall also be attached to the anti two-
block switches on both the main boom and boom extension.
If the boom extension is in the operating position and no load line is being used on main boom, to prevent
injury or damage to equipment, the weight shall be removed from main boom switch. 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
(not shown) at the 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).