The Body of Joskin Trans-KTP tipping trailer is completely made of 6 mm HARDOX450 steel.  This type of steel has very interesting elastic properties, as it takes its initial shape back after deformation.  Compared to the traditional high tensile steel, its elastic limit is 3 to 5 times higher and its stiffness, just as its resistance to impact and abrasion, is 2 to 4 times higher.

The whole body is based on 2 steel sheets, without any linking cross-weld.  To do so, Joskin folds and cuts steel sheets that are up to 8 m long.

As they are made of Hardox, they can be designed differently: the shape and the geometry of the body have been completely revised so that the steel can warp optimally.  As a result, the lateral reinforcing posts and the cross pieces under the body are not necessary anymore.  The unladen weight of the trailer is significantly reduced.

Thanks to the conical shape of the body, the contents of the trailer flow out freely and quickly.  This unmatched property is further reinforced by the successive folds aiming at smoothing off the edges of the body.  As a result, the frictional forces are kept to the minimum.

Nevertheless, we keep a flat 1.8 to 1.88 m wide floor sheet, this size being ideal to store pallets or unload material, e.g. by means of a telescopic handler or a front loader fitted with a shovel, a crane, a pitchfork, etc.

The reinforced upper strip increases the resistance of the side walls and also aims at supporting optional extensions.  Similarly, the front wall is strengthened by two widened posts.

In option, the upper strip may be protected by a PVC lining, so that the body can not be damaged by the loading tools.

The fully galvanized head board prevents the transported matter from falling on the hitching gear of the tractor.  It also protects the front tipping cylinder, which is available in option.  This latter is standard fitted on tipping trailers with driven axle(s).

Two types of extensions are available in option in order to increase the loading level of the trailer: extensions with spikes (directly welded to the body) or stackable aluminum extensions.

The first ones cannot be stacked and can be 150 or 250 mm high.  The truck-type stackable ones can reach a 250 and/or 500 mm height.  Consequently, the body can be maximum 1.95 m high.

The aluminum extensions are stuck into each other and bolted to the body upper strip by means of galvanized posts, which makes the whole structure very sturdy.

Thanks to these extensions, your Joskin Trans-KTP tipping trailer is more multifunctional and profitable when handling matter with a low density.

Just as the body, the rear door is completely made of Hardox steel.

The tipping operation is made easier by the hydraulic door with maximum opening angle, as the matter is not prevented from flowing out freely.

The door is linked to the arms by three fixing points and these arms turn on a large and sturdy axis.  The door cylinders are mounted under the arms for protection purposes.

The 1-part hydraulic door (completely made of Hardox) is included in the standard equipment.  Nevertheless, a 2-part rear door (also completely made of Hardox) with 400x400 mm grain chute is also available in option.

The telescopic tipping cylinder is mounted on a double oscillating frame fitted with greased bearings.  This system compensates the torsions due to the tipping strains and effectively protects the cylinder.

The body is fitted with two robust tipping hinges including bolted axes with a large diameter.  The whole system is greased in the middle so that the grease is optimally distributed.

The back and upwards position of the hinges increases the unloading height, which also makes the unloading operation easier and allows you to produce higher and more compacts heaps.

The safety valve, which is directly placed on the tipping cylinder, prevents the body from unexpectedly falling down (e.g. when the hydraulic hoses break).

The lights are conforming to the regulations an have been fixed slightly backwards under the body, so that they are better protected.  They are integrated into galvanized boxes fitted with a protected grate and they can be retracted when facing an obstacle because they are mounted on silent-blocks.  The double truck-types lights are standard mounted on all models.

Besides, two working lights (integrated into the chassis) and a flashing beacon can also be fitted at the back of the trailer.  The working lights are operated by means of a control box based on two independent circuits.

The optional rear bumper is supported by a set of pins, which makes it easy to adjust and to remove.  Thanks to its 45° slope, it prevents matter from piling up when tipping or reversing into a heap.

The whole structure is based on two large and long profile tubes linked by several cross-pieces.

Thanks to four wide supports, it is possible to make sure the body and the chassis are perfectly aligned.

In order to guarantee the safety of the user during maintenance operations and when the machine has to be set aside for quite a long time, a safety stand keeps the trailer in titled position while preventing any accident risk and making the rain water flow out freely.  Indeed, water is bound to stagnate in the tipping trailer and consequently damage it.

The standard swivel eyelet is fixed to a 145x160 mm flange with 8 bolts (M-20).  As a result, it can easily be replaced by another model in order to adapt your trailer to your tractor.

The drawbar and the chassis are perfectly aligned thanks to the special shape of the front face of the body.

The trailer is hitched to tractor by means of a rigid drawbar.  An axis is fitted at the back of the drawbar and suspension components are integrated at the front of the chassis.  This solution offers a straight pull and push line and a large hitching clearance, thereby absorbing the shocks.  The standard hitching hitching suspension is made up of a cross-leaf bundle.  In option, the leaves may be replaced by the hydro pneumatic suspension: in this case, two cylinders (with 15 cm course) are placed on both sides of the drawbar and linked to an accumulating device with two nitrogen balls.  These absorb the shocks progressively in order to guarantee an ideal driving comfort, whatever the transported load may be.

The parking stand, which is fitted with a wide skid, is completely integrated into the drawbar.  This results in a significant hitching clearance, which turns out to be very useful in earthworks.

The stand is fixed in central position and operated by a large double acting cylinder that vertically pushes when the stand is supporting the vehicle.  Thanks to this system, it is possible to avoid the unbalance of the trailer in parking position.

Each double-axle Joskin Trans-KTP tipping trailer is standard fitted with this Joskin Cross-Over boggie.  It is specially designed to provide the vehicle with the best compromise between ground clearance and traction ease and to meet the specific requirements of the most demanding works.

The Cross-Over boggie is made up of two axles linked by spring leaves that turn on a table bolted to the chassis.  It allows to compensate the ground unevenness and to transfer the weight of the vehicle on the four wheels (all the wheels are constantly kept on the ground).  The pivot point of all Joskin boggies lies under the leaves but the cross-over is particular in the sense that the axles are also fixed under the leaves.

Thanks to the outstanding resistance to torsion of the parabolic leaves, the suspension quality is further improved, whatever the riving speed of the carriage may be.

The special concept of the Joskin Cross-Over boggie leads to a much larger ground clearance while keeping the well-known traction ease of the Roll-Over boggie.

The rear axle of the boggie may be fitted with a tipping stabilizer:  in this case, it is pushed by two cylinders mounted on a parallelogram.  Thanks to this assembly, the cylinders and the rear axle are perfectly aligned.  As a result, the carriage is stabilized and secured.

In option, the vehicles with boggie or Hydro-Pendul suspension can be fitted with a free steering axle (with hydraulic locking) or a self steering axle, the latter being more efficient because it works constantly and independently (no function operated by the driver).

The self steering system is made up of a set-up unit (wheel alignment, circuit calibration), a mechanical control rod and a sensor cylinder on the drawbar side.  This cylinder makes use of the hydraulic pressure to transfer the movements of the tractor onto the steering cylinder of the rear axle.  Two accumulators absorb the overpressure due to the possible shocks.

The Joskin triple-axle vehicles are standard fitted with a double self steering system (1st and last axle) operating in both directions (forward and reverse).

The 150 mm axles with road brakes are available in option and, in this case, the standard brakes are replaced by 410x180 mm ones.  The 27T models (double or triple axle) are standard fitted with this type of brakes.

In option, the standard hydraulic braking system of the double-axle models can be replaced by air or combined (air and hydraulic) brakes in order to adapt your trailer to the braking system of the tractors.  The air braking system is part of the standard equipment of the triple-axle model.

The air brakes allow you to choose the proportional braking system, which regulates the braking power in proportion to the transported load.

The driven axle is the best solution to get the highest performance.  The "driven axle" option includes 1, 2 or 3 secondhand driven axles and is available on Hydro-Pendrul or Hydro-Tridem vehicles.  The axles are mechanically driven by the tractor P.T.O.

The chassis has been designed in such a way that the transmission box is protected by the drawbar, in order to keep the drive shafts aligned.  The hitching suspension with silent-blocks is part of the standard equipment of the vehicles fitted with driven axles.

There are several possibilities:  the standard transmission box has 1 gear forward and 2 electric controls (traction/secondary drive shaft).  This solution is mainly designed for tractors fitted with a proportional power take-off.  If this is not the case or if you want to have another gear forward, you will have the opportunity to choose a transmission box with 2 gears F and 2 gears R (with electro pneumatic control). The tipping cylinder must then be placed at the front and protected by a head board.

There are other options such as the hydraulic clutch on the driven axle, the inter-axle drive disengagement of the diff-lock.  These aim at improving the driving comfort and the efficiency of the vehicles fitted with driven axles.