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Liebherr 630 EC-H 40 Tower Crane (Radio Control)

Maker:  HK-FunctionsModellbau
Model No:  HK2050/03
Scale:  1:50
Review Date:  December 2017

HK-Funktionsmodellbau Index
Tower Crane Index

Cranes Etc Model Rating
Packaging   (max 10) 8
Detail   (max 30) 28
Features   (max 20) 20
Quality   (max 25) 24
Price   (max 15) 11
Overall   (max 100) 91%


Liebherr 630 EC-H 40 Tower Crane (Radio Control) Video.  [Youku Video]
Liebherr sleeve encloses the trays HK sticker shows this is conversion.
As unpacked, middle tray holds the mast sections, climbing frame and cab.
Shortest possible configuration.
Starting to lay the track..
Mast being built.
Bogie motors are realistically small..
Climbing cage has the top platform and ladder missing from the base version of the model.  Climbing ram looks good.
Slewing motors are a realistic size.  Toothed slewing ring.
Trolley winch motor is impressively small. The connection bolts between jib sections are much improved and provide better rails for the trolley and jib profile.
Halfway through the climbing process.
Warning lights flash at irregular intervals.
Excellent profile.  Heavy lift mode.

At the BAUMA exhibition in 2007 a prototype of this 1:50 scale model by Conrad was presented, and it entered production a year later.

The real 630 EC-H 40 has a maximum capacity of 40 tonnes at 15m radius, and can be configured with jib lengths of up to 80m.  It can also free stand to a height of 80m.

This model is a radio controlled conversion of the original Conrad model by HK-Funktionsmodellbau.  It includes almost all the options available including lighting, working climbing cage and rail mounted.


The model box is in the typical Liebherr style with a picture sleeve enclosing three expanded polystyrene trays and lid, which are loaded with parts.  Included with this conversion are various other items forming part of the conversion and enhancement.

The review model had no damage or missing parts.

Four leaflets are supplied with the model.  The first is a Conrad booklet which celebrates the achievement of the model - it is obviously something Conrad is proud of. The second leaflet is a typical Liebherr model style instruction leaflet with numbered pictures and printed in five languages although in reality it is far too brief to explain how to build the model properly.  Fortunately the remaining two leaflets make up for the shortfall.  They are identical, but cover four languages with Italians unfortunately missing out compared to the other leaflet.  These instructions are much better and include some proper diagrams to explain the bolting arrangements and the pendant layouts, although there is no inventory of parts.  Another addendum sheet by Conrad covers the changes in this 2050/03 version which are the pendant bars.

A comprehensive manual in German and English versions covers the Radio Control aspects.

This is a very big model so plenty of space is needed.  It should be possible to build it in a couple of hours.  On the whole the parts fitted very well with a little work needed to push home some of the plastic bolts.

Although not mentioned in the instructions it is possible to assemble the model in different jib configurations by using different combinations of pendants. 

For short jib configurations the model can be displayed with less than the full complement of counterweight, and this conversion improves the support for the counterweight blocks significantly.

For this review the shortest possible configuration was built and tested, and the review concentrates on the radio control capabilities and other enhancements on the converted model.


The track is enhanced with screwed connections for some of the sleepers and it is also possible to build a longer section of track (three times longer than the base model).

The cruciform base has cable drums to take the incoming power cable and the cable run up the tower.  The bogie motors are impressively small. 

The mast sections have the ladders and their cages permanently fixed in position and are greatly improved as a result.  LED floodlights can be fixed to the mast.

The climbing cage is enhanced with a top platform and access ladder, both of which were missing on the base model.  They are modelled in plastic, but they look good.  Special steel pins are supplied to fix the climbing cage to the slewing platform.  Electric cables connect the cage to the slewing platform.  The climbing ram is small and realistic.

The cab has an operator in it which is appropriate given this is a moving model.  The slewing platform has a traverse beam for the climbing function, and a heavy toothed slewing ring.  The slewing motors are impressively small.

Above the cab the tall 'A' mast head has a warning light fixed.

The counter jib has a warning light on the end and the winch motor is small and looks right for the model. 

Turning to the ballast blocks have been fitted with lifting eyes so they can be posed being lifted realistically.  Also the counter jib is enhanced with notches cut in to provide a secure anchor position for each slab.

The main jib is fixed with special fixing bolts which maintain the continuity of the trolley rails and also the profile of the jib.  Warning lights are provided at the jib end and at the intermediate pivot when used.

The trolley drive motor is small, and pulleys have been added to facilitate the run of the trolley drive cables.

Two trolleys are supplied with the model and these are enhanced with small working rollers. The large pulleys in the trolleys are enhanced with spoked versions and look much better than the plastic wheels of the base model.

This converted also included a bespoke illuminated advertising sign which as a pink ting when off.  White would have looked better.


The movement of the cruciform base on the rails is excellent, with variable speeds, and the cable drum spools automatically.

The crane rotates smoothly with some slight stickiness on the review model in certain positions.

The winch function is excellent with very slow speeds possible, making it appear very realistic.

The trolley movement is very good without offering the very slowest speeds.

The climbing function is brilliant model engineering.  The speeds and functionality are excellent with the ram generating enough power to lift the heavy crane above.  The transverse beam is also motorised so that a section of mast can be slid in without requiring manual intervention.  With skilled driving, the only manual input is removing and installing bolts, and  special tweezers are included to make this easy.

The warning lights flash irregularly when switched on.

The advertising sign can be illuminated.

Mast floodlights can be turned on and off and they are bright enough to illuminate the local worksite.


There electronic conversion is excellent and the wiring and components used all appear to be high quality. 


As this is a bespoke hand built conversion using specialized components it is expensive.  However the price reflects the quality of the model engineering provided.


HK-Funktionsmodellbau has produced a wonderful radio controlled conversion which maintains the realistic look of the model whilst providing very realistic functionality.  The detailing has also been improved in a number of areas to make a great model.


The Conrad model first appeared at dealers from April 2008 onwards.  The R/C version was seen first as a prototype at the 2015 Nuremberg Toy Fair.
As unpacked, top tray has the jib and counter jib sections.
Bottom tray has the cruciform base and small parts.
Erection proceeding.
Counterweight slabs have realistic lifting eyes.
Driver in the cab.
Electric cables.
Winch motor is impressively small.  Notches for counterweight slabs are visible.  Warning light at the rear.
Lights.  Warning, cab, advertising and floodlights..
Heavy lift underway with a double hook.
Transmitter and paperwork.