Liebherr LTM 1250-6.1 User Manual

Page 10

Mounting of counterweight –

just a matter of minutes

• Counterweight variants 0 t, 10 t, 22.5 t, 35 t, 47.5 t,

60 t, 72.5 t, 85 t and 97.5 t

• Ballasting controlled from the crane cab

• Quick ballasting due to the keyhole system

• Ballast rams fix-mounted to the superstructure

• Compact counterweight dimensions, e.g. 47.5 t counterweight

of 3 m width only

• 72 m long, 6-section telescopic boom

• Features of the new boom technology:

- optimimized, oviform boom profile – patented internal

interlocking system of the telescopes

- automatic telescopic system “Telematic”

• Telescopic boom with electronically controlled

telescoping system

• Boom bearings of low maintenance polyamide slide blocks

• Outstanding lifting capacities, e.g.

84 t at 10 m radius

38 t at 20 m radius

15.4 t at 40 m radius

8.4 t at 60 m radius

2.1 t at 80 m radius

1.1 t at 92 m radius

• 8-cylinder Liebherr turbo-charged Diesel engine type

D9508 A7, 450 kW/612 h.p., exhaust emissions acc. to

97/68/EG stage 3 and EPA/CARB Tier 3, energy-saving,

robust and reliable, electronic engine management

• Automated gear system ZF-TC-TRONIC with converter and

retarder; 12 forward and 2 reversed speeds, automated

control

• Robust transfer case with transfer differential

• Robust crane axles, welded design

• Max. driving speed 76 km/h, max. gradability 43 %

• Steel-fabricated, corrosion resistant cab, cataphoretic dip-

primed, front section on rubber shock absorbers, rear section

on hydraulic dampers, internal sound and heat absorbing

panelling, modern interior design of outstanding functionality

• Safety glass all-round, green-tinted heat-isolating front and

side window panes, electric window lifters

• Standardised digital operating and control elements arranged

in an operator-friendly halfround shape

• Additional heater with engine preheating

• Weight-optimized and low maintenance axles of high-tensile

steel, perfect track-keeping and lateral stability due to special

control linkage arrangement

• The low maintenance steering nuckles are steel and rubber

mounted, thus bearing failures are practically ruled out

• The perfected and robust axles are manufactured in large

series and are part of the trouble-free components of a

mobile crane

• The cardan shafts are maintenance-free. The 70° diagonal

toothing and 4 fixing bolts enable easy and fast fitting of the

cardan shafts

Ultramodern boom technology

Powerful carrier drive

Modern and comfortable

driver’s cab

Outstanding carrier technology

for road and off-road operation

• Steel-fabricated and corrosion-resistant crane cab, powder-

coated, with internal sound and heat absorbing panelling,

modern interior design, tinted panes all-round, front knockout

window with large windscreen wiper and washer, skylight

of bullet-proof glass with large windscreen wiper and washer,

roller blinds on front window and skylight, space saving

sliding door

• Additional heater

with engine preheating

• Pneumatic operated footboard for safe access to the carrier

• Crane cab tiltable by 20° to the rear

• Crane engine: 4-cylinder Liebherr turbo-charged Diesel

engine type D934L A6 of 180 KW/245 h.p., robust and

reliable,exhaust emissions acc. to 97/68/EG stage 3 and

EPA/CARB Tier 3, electronic engine management, optimized

fuel consumption, exhaust gas system of stainless steel,

very efficient noise abatment of the dieselhydraulic crane

drive

• Slewing rim, slewing gear and the winches are self-

manufactured components specially matched for the

application on mobile cranes

• The centralized lubricating system for slewing rim, boom

bearing application, luffing rams and winch bearings is a

standard feature

Crane cab of modern design

Crane drive with

field-proven components

• Maintenance-free suspension rams, free from lateral forces

and protected against damage by synthetic tubes

• Level adjustment (suspension set to “travel mode”) can be

performed automatically from any position by push-button

control

• Stable cornering ability of the crane due to cross mounting

of the hydropneumatic suspension

• Axle locking system (blocking of the suspension for travelling

with equipment) integrated into the suspension rams and

controllable from the driver’s cab

• Carrier, superstructure and telescopic boom in light-gauge

design, calculated by the F.E.M. method, thus weight-

optimized and particularly torsonally rigid

• Tensile property of the material with high safety factors

through the application of STE 960 (960 N/mm

) for all

supporting members. Telescopic boom bottom shell of ultra-

high tensile steel S 1100 QL (1100 N/mm

)

• Weldment joints of oustanding quality are performed by

computer-aided welding machines

• The weld quality is documented by ultrasonic test

Crane- and road-preserving

Niveaumatik suspension

Weight-optimized steel structure

6.56

2.45

R = 5.6

12.5 t

47.5 t

12.5 t

10 t

47.5 t

LTM 1250-6.1