531 kNm knuckle boom crane

MKG hydraulic marine crane, model HMC531HP, basic unit a6, knuckle boom type with special crane base for stationary mounting, cranked column in all-steel design, slewing ring gear with slewing gear assembly and hydraulic slewing connections for 360° continuous slewing (slewing torque 56kNm with 2nd motor), jib 6-times hydraulically extendable under load to max. reach of 16,40m. All rams are double acting and the piston rods are hard chromium plated, complete hydraulic system consisting of:


One lifting ram, one jib ram, six extension rams, slewing gear, Danfoss control valve block with five individual control valves (high precision), load holding valves at all cylinders and overload protection valves. Scanreco radio remote control 5 functions consisting of transmitter and linear- or cross lever controls (watertight), receiver, charger with 2 re-chargeable batteries, add. cable control, automatic frequency-search at start-up, emergency-off, multiple-speed choice. Black box (3B6) with digital display in a stainless steel housing. Manual lever control, electric board and radio receiver at column in stainless steel housing. Load holding valves and overload protection device. Special damping control by pressure reservoir to minimize centrifugal forces acting on the load-bearing components. Emergency shut-off button at all controls and visual warning device. Central lubrication system by electric pump.

Lifting capacities (SWL) with 310 bar reduced working pressure according to marine classification at 21° main boom angle:


load hook - 2.050kg/16,25m


winch-hook - 1.950kg/16,25m


The lifting capacity is limited to the max. pulling force of the resp. winch.


Hydraulic winch 5.000kg capacity at single line/1st layer/4.150kg on 3rd layer, rope length 55m, rope diameter 15mm (spin-resistant). Average speed at 90l/min. - 40m/min. Control valve, pulley and safety hook. Detachable winch-pulley and parking suspension for hook-block.


KTL-treatment of steel structure, i.e. electrostatic coating process (cataphoretic painting in accordance with corrosion protection class C5, DIN EN ISO 12944-2) against corrosive environment, crane base - St 52-3, column/booms - St e 460, cylinder tube - St 52-3, piston rods – twice chromium plated (option: stainless steel), bushings - seawater proof bronze, (optional: hose-ends/clamps/ piping in stainless steel), sandblasting, 300µ-coat colour system, painting RAL 5010 - blue or any other RAL-colour at your choice.


This crane is manufactured according to German Standard DIN 15018 resp. EN12999 to meet marine specifications for provision/service crane type "A". Min. 7° heel and 2° trim with full load.

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