Planeta LHT Series, Operating And Maintenance Manual

Page: 9 / 16

9
Hooks can be bent open or elongated due to heavy loading and improper handling of
the equipment. If the original dimension „G“ is exceeded by 10%, the hook must be
replaced. If this is the case, then the overloading has also damaged other load-bearing
parts and the hoist must be checked thoroughly for deformations in all components.
Since the hooks vary due to forging tolerances, actual dimension „G“ on
the equipment in question must be measured by the operator before initial
commissioning, and entered in the following table.
Load
bearing
capacity
Hook opening „G“
normal max. Measured max. x 1.1
0,5 t 26 mm 29 mm
1 t 32 mm 35 mm
1,5 t 38 mm 42 mm
2 t 38 mm 42 mm
3 t 43 mm 47 mm
5 t 48 mm 53 mm
10 t 60 mm 66 mm
20 t 84 mm 92 mm
7. PREMIUM PRO overload safety device
All PREMIUM PRO spur gear hoists have an
adjustable overload safety device as standard.
This protects the equipment by the fact that
one cannot lift more than the preset frictional
engagement in the hand wheel permits. The
overload safety device is factory-set to approx.
125 % of the nominal load.
The pressure on the friction disk is increased or
reduced by tightening and/or loosening the press
nut (Item 51).
Once the desired value has been reached, the
nut (Item 51) is secured by bending one or two
teeth of the toothed washer (Item 52) into the
appropriate recess on the nut.
jaw span