WEIGHLOAD AUTOMATIC SAFE LOAD INDICATOR, MK.1
MODELS 4, 5 and 6.
The following instructions and recommendations are given as a general guide. Mounting positions for the various
components may vary on cranes of different type or manufacture but the general principle is the same in all cases.
1. For cranes with a single hoist rope used for main boom duties only or re-reeved through the jib, three main
components are necessary, i.e.,
b. Control Box including Load Cell and Capillary.
c. Alarm Unit.
2. For cranes with two hoist ropes, one for main boom duties the other for jib duties, two further components are
d. 2nd Dynamometer (for Auxiliary Hoist Rope).
e. Summator Unit.
3. Various fittings are also supplied:-
a. Boom Foot fittings (including Pulley).
b. Flexible Drive Cables, Conduits and Fittings.
c. Mounting Plate for Control Box.
The Model Number as shown on the Serial Plate on both Control Box and Dynamometer refers to the physical
size and capacity of the equipment. Installation Instructions are the same for each of these models.
INSTALLING THE DYNAMOMETER.
According to the type of crane on which it is to be fitted, the Dynamometer may be rigidly mounted on the base section of
the boom on on a "swinging arm" frame which allows it to follow the true path of the hoist rope, as the rope travels across
the hoist drum and/or changes angle with the boom during derricking.