22. 1. 2011

GROVE GMK 6400, 400t class AT crane

GROVE GMK 6400 is a very new model in the production line. It was shown to public in BAUMA 2010 together with GROVE GMK 6300-L for the very first time. These two cranes have new design of drivers cab, which might be used on all future 5 and more axles GROVE mobile cranes models.
GROVE GMK 6400 is the most powerful 6 axle crane on the recent market. It also offers new design solutions on chassis and superstructure as well.
The main innovation on chassis is a hydrostatic power on axles 4 & 5, GROVE designed MegaDriveTM. This hydrostatic drive propels the crane from 0 to about 20 km/h and then a conventional drive on axles 1 and 2 takes the crane move through ZF automatic gearbox. The hydro move is pretty smooth. There was quite long testing period of this system on a testing GMK 4080 done. The result wor very positive and the system was accepted for serial production then.
Newly designed boom with strength optimal O shape MEGAFORMTM consists of 5 telescopic sections. It is 60 meters long and it can be extended by a 79 m luffing jib. The very strong load chart can be even strengthened when MegaWingLiftTM is used. The MegaWingLiftTM attachment is self rigging. No another crane is needed to place the MegaWingLiftTM to the crane chassis.
Quite interesting is that this crane is powered by one engine only. Designers have chosen Mercedes-Benz OM502LA, which complies with Tier 4i, stage Euromot IIIb and from 2011 with the EURO V as well.



Basic performances of the boom:
Maximal load : 400 tones on radius of 2,5m
Maximal radius : 56m with load of 6 tones
Maximal hook reach : 59m with load 35 tones on radius of 11m
Basic performances of the boom equipped by Mega Wing Lift :
Maximal load : 108 tones on radius of 8 m (up to the height of 34 m)
Maximal radius : 54m with load of 9,6 tones
Maximal hook reach : 59m with load of 49 tones on radius of 11m
Basic performances of the 79 m luffing jib with the boom extended to maximum and strengthened by Mega Wing Lift :
Maximal radius : 84 m with load of 4.9 tones (up to the height of 75 m)
Maximal hook reach : 130 m with load of 8.1 tones on radius of 34 m

Technical description of the GMK 6400 superstructure:
Boom
15,4 m to 60,0 m five section MEGAFORM boom with TWIN-LOCKTM pinning. Elevated by 1 cylinder with safety valves, boom angle from -1,5° to +82°.
  • 10 nylatron sheaves
  • Removable auxiliary boom nose with removable pin type rope guard.
Optional jibs
  • 25 m - 79 m (82 ft - 259 ft) luffing lattice jib
  • 12 m - 64 m (39 ft - 210 ft) fixed lattice jib (offsettable 3° to 25°)
Optional boom strengthening system Mega Wing LiftTM
Lift enhancing system to improve load charts. The self-rigging MegaWingLift™ can be installed without the help of an auxiliary crane.


Crane operators cab
All aluminum constructed cab with acoustical lining, hydraulic tilted to 20°. Includes tinted safety glass, adjustable operator’s seat, opening windows at side and rear, hinged windshield with wiper, sun visor and window shade. Other features include hot water heater/defroster, armrest integrated crane controls, ergonomically arranged instrumentation and radio/CD player, air conditioning, working range limiter.
For EU it is equipped by requirements of the latest version of EN 13000 standard
Load moment and anti-two block system
GROVE EKS 5 - system with audio/visual warning and control lever lockout provides electronic display of boom angle, length, radius, tip height, relative load moment, maximum permissible load, load indication and warning of impending two-block condition.
Slewing
3 planetary gear boxes with fixed displacement axial piston motors. Infinitely variable to 1.4 rpm. Free swing or hydrostatically engaged brake controlled by swing lever. Swing brake selected by foot operated switch..
Counterweight
Standard counterweight is 115 t, consisting of base section and 10 t sections, similar to sections from model GMK 7450. Hydraulic removal system is controlled from the operators cab. Interesting is the counterweight design. You have middle plates and side plates. The side plates are shaped same for left and right side, very users friendly. You do not need to count left and right side plates when preparing for light lift, just take enough ..
When MegaWingLift™ is used, additional 20 t are required
Hydraulic motor
5 separate circuits, 3 axial piston variable displacement pumps with power limiting control,1 axial piston variable displacement pump for slewing and 1 fixed displacement pump for auxiliary gears.
  • Thermostatically controlled oil cooler.
  • Tank capacity: 1500 l.
  • Hydraulic motor 180 kW (240 hp) Rexroth. Maximum torque 456 Nm (336 ft/lb). Supplied by hydraulic carrier pumps.
Control system
ECOS electronic control of all crane movements using electrical control levers with automatic reset to zero. Integrated with the LMI (EKS 5) and engine management system by CAN-BUS.
Hoist
Main and auxiliary hoists are powered by axial piston variable displacement motor with planetary gear and brake.
  • Drum rotation indicator.
  • Main hoist rope length 380 m, diameter 24 mm and line pull 110kN
  • Auxiliary hoist rope length is 690 m, diameter 24 mm and line pull 110kN
  • Hoist camera.
Electrical system
Three-phase alternator 28 V/80 A, 2 batteries 12 V/170 Ah.
Technical description of the GMK 6400 chassis:
Chassis
Special 6-axle chassis, all-welded torsion-resistant box type construction is fabricated from high strength steel.
Outriggers
4 double hydraulically telescoping beams with vertical cylinders and outrigger pads. Independent horizontal and vertical movement control on each side of the carrier. Font outriggers with hydraulic disconnection, removable rear outrigger box.
  • 5 position setting
  • Electronic leveling system
  • Outrigger length control
  • Load indicator with read out on both sides of carrier and the superstructure cab
  • Work light for each outrigger
  • MMI (the outrigger control box) can now control engine start/stop and Megatrak cylinders stroke.

Engine
Mercedes-Benz OM502LA, diesel, 8 cylinders, water cooled, turbocharged,
  • Power 405 kW (551 HP) at 1800 rpm.
  • Max. torque: 2700 Nm at 1300 rpm.
  • Fuel tank capacity: 700 l.
Engine emission: EURO V .
Transmission
ZF AS Tronic 12, Electronic Automatic Shifting, Integral with engine torque converter
Drive/Steer
12 x 8 x 12
MegaDriveTM
Hybrid drive system with axles 4 and 5 hydrostatically driven. Axles disconnect at speeds greater than 25 km/h (16 mph) and connect at speeds below 20 km/h (12 mph).
Axle lines
6 axle lines. 1st, 2nd, 4th, and 5th are driven steering axle lines, 3rd and 6th are steering axle lines.
Suspension
MEGATRAKTM. All wheels with independent hydropneumatic suspension and hydraulic lockout. Longitudinal and transverse level control with automatic on-highway leveling system. Range +220 mm/-80 mm. 
Tires
12 tires with standard size 14.00 R25. As an option can be chosen size 16.00R25 or 20.50R25. The tires can be mounted on steel or aluminium rims.
Steering
Dual circuit, hydraulic power assisted steering with emergency steering pump. Axle lines 1, 2, 3, and 6 steer on highway. Separate steering of the 4th, 5th and 6th axle line for all wheel steering and crabbing.
Brakes
Service brakes: pneumatic dual circuit, acting on all wheels, air dryer. Parking brake: pneumatically operated spring-loaded brake acting on axle lines 2, 4, 5 and 6.
Cab
Two-man, composite designed aluminum and fiber reinforced plastic construction with the following features: safety glass, driver seat with pneumatic suspension, engine-dependent hot water heater, power windows, heated rear view mirrors, complete instrumentation, driving controls, reversing camera system, air conditioning, radio/CD player, 12V plug and fire extinguisher.
Electrical system
  • Three-phase alternator 28 V/100A, 2 batteries 12 V/170 Ah.
  • Lighting system and signals 24 V

CraneSTAR
Manitowoc designed asset management system software package; includes internet access to up-to-date crane information; monitor machine locations, working conditions; & plan lifting schedules
Production plant
The production plant of this crane is in Germany, Wilhelmshaven, Manitowoc Crane Group Germany GmbH.
Web links
 

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