The documentation used to make this model is the same one already used
for the model of the 992C (page one) and that of the first 992D (page 3).
Therefore, no need to take a dimensional survey ... the work has already been done!
Nevertheless the plans have been revised and improved ...
Like its brothers, the construction of this model is also made of aluminum glued with epoxy glue
for high stresses (reinforced by pegging) and cyanoacrylate glue
for low stresses.
In addition to this, you need to know more about it.
Realization: from June 2004 to October 2006
and after a long stop ...
In addition to this, you need to know more about it. from January 2014 to May 2019
totaling:2800hours.
The real craft.

Real 992D (Caterpillar photo).
L'engin réel (photo Caterpillar) ...
... and its PDF.
The model.
The chassis.
As with the model of the 785 dumper, all the parts constituting the frame are traced, cut and folded by hand in 0.5 mm aluminum sheet. The multiple fixings are obtained by gluing (epoxy glue), after having been reinforced by internal screws, installed before the application of the glue, in order to obtain more resistant seals for the different assemblies of the parts.
The transmission.
SOn the model, the mechanical components which constitute the transmission are present and may be functional. But the option chosen for this model is to stay in a "static" register; it is a choice in relation to the finish aspect of this model. Indeed, we can easily imagine that it can deteriorate very quickly,
at least on this type of construction and finish, knowing all the constraints
that can be subjected to public works machinery, especially small ones
The kinematics.
It is made up of:
- an electric motor for a 12-volt automobile heater fan,
- 6 cardan joints, one of which is telescopic (chassis articulation),
- a reduction / transfer box in the ratio: 12/1,
- a conical torque in each axle in the ratio: 3/1, plus a differential,
- a planetary gear reduction in each hub at a ratio of 3.5 / 1.In addition to this, you need to know more about it.In addition to this, you need to know more about it.
The differentials
(Mechanic gears)
The bridges.
The reduction / transfer box.
Epicyclic train
("house" molded crown)
Functional organs.
Lift, bucket and steering cylinders.
They are of personal design.
As for the D8K and the 785, the option chosen for their operation
In addition to this, you need to know more about it.is the pneumatic energy, this choice is related to the finishing aspect of the model.
In addition to this, you need to know more about it.In addition to this, you need to know more about it.
Lifting cylinder.
Bucket cylinder.
Steering cylinder.
The driving position.
Different parts and consoles.
Right console.
Front console.
Left console (before painting).
Seat (in balsa) with its ...
... left console.
Interior.
Driving position finished ....
... in its interior.
The tires.
Plaster model to be cast.
Formwork.
Model semi immersed in its mold.
Final product in the two-part mold.
Semi-finished tire, filled with polyurethane foam.
Final black paint.
Drying...
Tire finished with its rim.
Model completed.
Dimensions:In addition to this, you need to know more about it.
In addition to this, you need to know more about it.In addition to this, you need to know more about it.
Overall length: 900 mm Overall width: 312 mm Overall height: 360 mm Weight: 12 kg
In addition to this, you need to know more about it.In addition to this, you need to know more about it.
Some details...
Finally, commercial pieces:
In addition to this, you need to know more about it.In addition to this, you need to know more about it.
- aluminum sheets 0.5 mm thick.
- the micro screws of M1, M1,4 and M1,6.
- all rods of different diameter.In addition to this, you need to know more about it.
- small diameter tubes.
- the pinion (except the crowns).
- the different glues: epoxy, cyanoacrylate, neoprene.
In addition to this, you need to know more about it.In addition to this, you need to know more about it.