c. Lay the hoist rope over these three center sheaves replace the spacers and bolts.
d. Ensure that there is sufficient slack in the rope and replace the two outer sheaves on too of the rope
ensuring that the side thrust washers are in position.
e. Carefully re-fit the shafts, ensuring that the cotter pin holes in the shafts line up with the holes in the side plate
bosses. Refit the cotter pins.
When supplied from the Manufacturer, the cotter pins through these shafts are unopened, enabling them to
INSTALLING THE CONTROL BOX.
The Control Box should be positioned, as far as possible, well within the vision of the operator but allowing as straight a
run as possible for the drive cable from the pulley at the rear of the box to the boom foot. Free access must be made to
the door at the front of the Control Box and also to the zero adjuster and parts of line changing knob at the top of the
The mounting plate for the Control Box may be welded or bolted to the floor of the cab. It may be more suitable to raise
the level of the Control Box for better visibility, in which case convenient spacers may be used beneath the pedestal. If
spacers are used, suitable bracing may be required to make the mounting rigid.
If more convenient, the Control Box may be bolted direct to the cab structure by means of additional holes which may be
drilled through the Control Box casting. It is essential, though, that the bolt heads do not foul any fixed or moving parts
within the Control Box and all burrs must be removed after drilling. NO ATTEMPT MUST BE MADE TO WELD THE
CONTROL BOX DIRECTLY TO THE CAB STRUCTURE.
A hole must be provided to allow the Load Cell to be threaded through from the Control Box to the Dynamometer. THE
CAPILLARY TUBE JOINING THESE TWO COMPONENTS IS A SEALED ASSEMBLY AND MUST NOT BE
DISCONNECTED AT ANY TIME.
The hole, therefore, must be large enough to allow the complete Load Cell to be passed through, not just the capillary. A
further hole must be provided to allow the boom foot drive cable to be passed through from the Control Box to the boom
foot. The holes should be on the natural run of the cable to avoid chafing, kinking and sharp bends.