Liebherr 81 K User Manual
Fast-erecting crane 81 K
Max. lifting capacity: 13,230 lbs
Max. radius: 147’-6”
Lifting capacity with max. radius: 3,090 lbs
Works efficiently
and looks good
The 81 K fast-erecting crane.
Comfortable cab
with best possible view of the site
Torsionally resistant
Fully automatic play-free tower
connection
Integrated intermediate
hook heights
CC-Ballast
Saves time thanks to
boltable ballast slabs
New switch cabinet
Programmable logic control system, graphic display,
remote diagnosis, and much more besides.
Quick-Connection
for play-free connection of the
tower to the slewing platform
Variable slewing radius
9,02 - 11,48 ft
11 hook heights
Thanks to climbing capability
of tower sections
2
SPEED 2 LIFT
Pure two-line operation for
maximum handling capacity
MICROMOVE
Millimetric precision with
fine positioning
25% more
jib end lifting capacity
4 different
jib lenghts
Contents
Working fast and safe – for sure! Page 4
Our drive is your success. Page 10
Arrive efficiently. Page 16
Simply well set-up. Page 20
Assured long life – maintenance and more. Page 24
Technical Data. Page 28
Uses in summary. Page 31
3
SPEED 2 LIFT
Always max. load and
full speed with two-line
operation
4
147.6 ft / 3,090 lbs
Working fast and safe – for sure!
SPEED 2 LIFT: two-line operation for maximum performance at full speed
Unrivalled maximum lifting capacity
MICROMOVE: precision mode for millimetre precision positioning at the push of a button
Secure working movements with load swing damping and wind load control
5
m/min
kg
Working fast and safe – for sure!
To date – Either fast or strong!
lb
New – Fast and strong.
ft/min
Rereeving – no longer required
The 81 K operates exclusively with two-line operation. Maximum performance at full speed – always! With hoists at
maximum lifting capacity and empty hook runs. Hoist speed
always matches the hanging load. By the way – half of all load
cycles are empty runs. We have increased the speed by 15%.
Strong matter
Currently up to 25% more
lifting capacity.
25 %
6
Loads precisely positioned
With MICROMOVE, at the push of a button on the
control lever, lowering speed is reduced to micro levels. Even the heaviest loads can be precisely suspended and positioned without using the hoist gear
brakes.
Accurate against the wind
Wind influences the movement of the jib! With the wind
load control, the jib position is regulated automatically.
Counter measures are not necessary. Large-scale loads
(i.e. form panels) can be moved and suspended precise-
ly even in wind.
Steady handling
Fast turning movements can lead to swinging loads. The
integrated load swing damping automatically compensates for this. A significant step for safety on the building
site!
Standard current collector
No restrictions with slewing and no
wound cables.
Always full
lever control
The bigger the load, the more
precisethe control.
7
Flexible is efficient.
The success
on your site
The operational area of the 81 K encompasses apartment
block construction to industrial projects. Great flexibility with
11 different crane heights, the 30° raised jib angle and the
45°-obstruction avoidance angle equips the 81 K for every building site. Operations under power lines or in halls are
possible through the telescopic tower. Define the success of
your construction site yourself!
Short projection
You can use the full radius
also with limited building
site space.
57‘-1“ 85‘-3“ standard hook hight up to 132‘-5“
Fast climbing
Up to 6 inserted tower
sections enable 11 hook
heights.
8
30
Range with lifting capacity
Adjustable jib in 4 lengths to meet individual requirements
– between 101 ft and 147 ft. You profit from customised
lifting curves.
Obstructions or high reaches
With the 30° raised jib position and the 45° jib obstruction
avoidance position you can match the crane to every operation – and reach hook heights of up to 180 ft.
147‘-1“ / 3,090 lbs
137‘-8“ / 3,640 lbs
121‘-4“ / 4,740 lbs
101‘-7“ / 6,390 lbs
30°
Variable slewing radius
Save more than 35% space requirements through reduced
slewing radius. The crane can be set up nearer buildings or
during operations with limited building site space. Choose
between reduced space requirements or less ballast.
Extreme situations
Also work with obstructions i.e. under power li-
nes with retracted tower.
45°
11‘-48“ - 9‘-0“
Multi-volt
100
200
Adjustment of operating
voltage to local condi-
0
tions (380 - 500 v / 5060 Hz).
9
Our drive to your success.
Powerful drives manufactured in-house ensuring the highest quality – for decades
PLC-control for increased safety and user comfort
Steel construction resistant to torsion for durability and precise working
Comfortable cabin with optimum view for maximum working comfort
10
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