IMC Demag AC 250-5 All Terrain Crane by Cranes Etc TV

IMC Demag AC 250-5 All Terrain Crane by Cranes Etc TV


In this review we’re looking at a new
mobile crane model from IMC Models. It’s a Demag AC 250-5 and look in the
video description for a special offer if you want to buy this model.
Inside the box are the usual pair of expanded polystyrene trays and there is a
manual we will look at shortly, but firstly we will get the knife out and cut the factory
seal, and lifting the lid shows the model parts wrapped in soft paper, so it’s all
nicely packaged. Now take a look at the manual and it
starts with a good parts list although there are some parts not listed, and
we’ll cover those later, and then there are very clear step-by-step instructions
for the various features of the model. It goes through the various transport mode
options and then goes on to cover the setting up and operation of the crane.
The only things missing are a reeving diagram for the hook but the model does
come ready reeved, and there’s no information about the real crane. Let’s
start by looking at the counterweight, which is nicely made and comes in all of
the various separate parts so it’s accurate to the real machine. For the
transport mode we’re going to carry a piece of the counterweight on the
carrier deck so we’ll raise the boom a little and then position it. The other
part we will carry with us is the fly jib and this crane is very detailed when it
comes to the attachment system for the jib. It includes a fold-out support and
also a hydraulic gripper. To fit the jib we need to offer it up
to the side of the boom and it can be a little bit fiddly to get that gripper at
the front in the right position. Here you see it close up as it holds on to the
jib. So that’s the crane ready for the road so how about something to go along
with it? Well we’ve got some counterweight and spreader plates to
carry so we’ll use a Nooteboom Multi-PX trailer to carry the loads. Looking underneath there’s a detailed
transmission and small tanks, and a nice touch is the soft mud flaps behind the
front and rear axles. The front looks great with a detailed driving cab and a
big spool on the boom gives it a busy look. The detail behind the cab is
excellent with fine quality metal work and a particular plus point is the
numerous high quality and tiny graphics. These are spread all around the model
and I give it a very realistic look. Even the metal main boom ram jacket has a
tiny graphic applied. The boom sections have a thin wall profile so they look
very realistic and there are metal sheaves in the boom head even though the
ones on the real crane are not metal. The fly jib is metal and it’s a very
nice-looking part. There are two small parts provided which are not listed in
the manual and one of them is a pin for the rear towing point. A position for the
other part is not so obvious but it goes in the hole that you would normally use
for the key that operates the winch. Remember if you want to support the
Cranes Etc team you can do so over on our Patreon page and the link is in the
video description. As usual we start with a look underneath and the axles have
nice independently sprung suspension. For the steering the rear two axles are
linked together although on the real crane they can steer separately. At the
front there’s quite a complex linked steering arrangement with all three
axles steered but it is proportional and you can get a good angle on the front
axle. So let’s try it now right side up and it rolls well enough and we’ll set
the steering to see how it gets on. If you wanted you could also set a form of
crab steering with all the wheels pointing the same way, but as we see here,
set conventionally the steering works well. Enough driving about. We’ve arrived
on site so let’s set up and a very nice touch are these access ladders which can
be rotated and folded down, and there is two on each side.
We also need to be able to help the operator to get into his cab and to do
that is a little pull out access platform underneath the cab, and in this
case the operator is issued with a giant pair of tweezers in order to get the
access platform out. So it takes a little bit of effort to get it out and posed
properly. Once you’ve done that it looks good.
Next operation is to go for something strong and stable, so we need to pull
out the outriggers to give the crane a firm base. The pads have got a nice
offsetting mechanism for transport and to lower them you unscrew them in the
normal way. Perhaps the only surprise is that the pistons have a visible screw
thread rather than a smooth face. But a nice touch is that you can insert
a pin in to the pads to lock them into a central position. Included with the model
are a set of four heavy spreader plates. With the outriggers down it is strong
and stable, and the crane can be supported wheel- free, and as we can see
here the outriggers are nice and straight. So now we’re ready to raise the
boom and to do that it’s a finger job. It lifts up smoothly and the metal ram
can be locked in any position and to do that you use a key to tighten up some
small screws. We can now continue to load up the rest of the counterweight and any
of the configurations of the real crane can be reproduced, and if you want to go
to the maximum there are a couple of cheek weights that hook in on the
outside. In real life the crane should be able to rotate round and pick up its
counterweight but you can’t do that on the model because of the fixing
mechanism that’s been chosen and that consists of inserting two steel pins to
lock the counterweight in place. But as you would expect there’s no problem with
the scaling of the model because it rotates nicely over the carrier deck.
The telescopic boom works in a normal way. You pull out the sections and there
are locking positions at the 50% mark and at full extension for each of the
sections. One thing you can notice again here is that the wall thicknesses of the
telescopic sections are realistically thin. The telescopic sections are locked
by small locking clips and here we see to lower an extension from 100% to 50%
we push in the clip, push in the section, and the clip locks again at the 50%
mark. To operate the crane you insert a key into
the winch and it is spring controlled with a positive brake. It works well enough
without being a precision mechanism. The crane does feature a tilting cab and
that’s very nice because it holds any pose easily. The main boom reaches an
impressive height but if you want more we have to attach the fly jib and that’s
a little unusual in terms of the way it’s done on this crane. Two connections
at the bottom are made and then secured by small steel pins and that’s a fairly
normal system for attaching the fly jib. At the top though things are different
because you need to attach two hydraulic rams, and you make those connections by
using two tiny black nuts and bolts. To do that two special tools are supplied
so that makes the job relatively easy. The only thing to avoid with parts that
are this small is over tightening the bolt. There was one issue on the review
model which is that one of the rams had its grub screw on the inside face rather
than the outside face and that’s an installation issue in the factory, but
it’s easily fixed all we need to do is to undo the bottom nut and bolt and
rotate the cylinder so that the grub screw is on the outside, then we can get on
and run the rope to the end of the jib. But we are left with a cut off chain
hanging and that doesn’t really look right but if you gently open the top
link you can remove it from where its hooked on. Here we’re on a half-length
fly jib and although there’s not a proper fixing point for the chain you
can just hang it over and it looks okay. One nice aspect of the hydraulic rams is
that by using them you can set the fly jib to a tilted angle and that gives you
some very nice flexibility in displaying the model. There is only one hook
supplied with the crane and that’s a three sheave version, and it would have
been nice if there was been a single line hook for the fly jib. So
that was a half-length fly jib but we can open up the folding section and get
to a full length, and once you have got it into the straight position you lock it
with a long steel pin. So the longer fly jib gives you even more flexibility and
of course as we’ve already seen if you wanted to you could have it angled as
well. But how big is big? So let’s get the tape measure out and to the top of the
main boom is about 53 inches or 135 centimetres, and with a full fly jib the
maximum height is about 68 inches or 174 centimetres. This is a very high quality
crane by IMC models. It is well made and a particular high point is the level of
detailing, but that’s also matched by a very good level of functionality. So if
you want a high quality 5 axle crane, this one is excellent.

19 thoughts on “IMC Demag AC 250-5 All Terrain Crane by Cranes Etc TV

  1. Always remember that the crane mats are going at the back of the trailer,because thats the first thing you gonna get of the trailer..So whitout counterweight thats the load you gonna get first an the back of the trailer you can get it as close as you can to the crane..Nice review!!

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