PRONAR Überladewagen 28 m³, Schnecke 400 m³/h, Austrag 4,85 m

Standard equipment

• Tandem chassis with parabolic suspension, rear self-steering axle, axle spacing 1.810 mm
• Hopper with profiled walls, vertical reinforcements and bolted extensions
• Trough-shaped floor with twin auger conveyor
• Front hydraulic double-segment auger with hydraulic locking
• Twin auger with two speed settings
• Automatic overload clutch 1 3/4" Z = 20
• Rigid drawbar integrated into the frame, with towing eye Ø 40
• Telescopic support leg with gearbox
• Dual-line compressed-air brakes, drum brakes 406 × 140 mm
• Handbrake
• Front wall with three PLEXI viewing windows
• Platform at the rear wall, folding access ladder outside and inside
• Non-slip floor grating along the inside of the hopper
• Three inspection windows in the floor, the front one hydraulically operated
• Tarpaulin frame
• LED lighting system 12 V
• Metal mudguards, wheel chocks with holder
• Paint finish: chassis red RAL 3000, side walls green RAL 6010

Technical data

Note: All listed parameters apply to individual approval in Germany. For individual approval, tyres must be selected in accordance with StVZO.

Product description

Chaser bin for harvest logistics

The bin holds 28 m³ and unloads at 200 to 400 m³ per hour via a 5.17 m-long double-segment auger. The discharge opening is between 4.550 and 4.850 mm high.

Why a chaser bin speeds up harvesting

This is the key point: The combine should be harvesting, not waiting.

• Without a chaser bin the combine stops when there is no transport vehicle at the field edge – or it drives to the edge itself and loses harvesting time.
• With a chaser bin the bin travels alongside the combine and takes on grain while moving. The combine keeps harvesting, and the bin takes the load to the transport vehicle at the field edge.

The second, often underestimated benefit: Heavy lorries and farm trailers stay at the field edge. This protects the soil – subsoil compaction is difficult to reverse and reduces yields for years.

200 to 400 m³/h – the figure that matters

The twin auger has two speed settings.

What this means: At full capacity, 28 m³ can be transferred in just over four minutes. For delicate crops – seed, malting barley, oilseed rape – the lower setting runs and handles the grain more gently.

How it helps prevent broken grain: Every change of direction and every acceleration in the auger puts stress on the grain. A slowly running, well-filled auger conveys it considerably more gently than a fast, half-empty one.

Discharge height 4.550 to 4.850 mm

The height is adjustable. This allows the auger to reach over the sides of any standard transport vehicle – from farm trailers with extensions to lorry trailers and containers.

Adjustability matters when filling: At the start, the load is discharged just above the side wall to prevent the grain from falling and creating dust; towards the end, the auger is raised to fill the last corner.

Trough-shaped floor with twin auger conveyor

The floor is shaped as a trough, with two augers running in it.

Why this ensures complete emptying: With a flat floor, residual grain always remains at the sides – and residues are a problem with seed and when changing varieties, because they contaminate the next batch. The trough shape guides everything to the augers.

Three inspection windows in the floor, the front one hydraulically operated, allow inspection and cleaning – a crucial point when changing varieties.

Automatic overload clutch

The 1 3/4" Z = 20 clutch protects the driveline if something jams in the auger – a stone, a piece of wood or compacted material. It slips instead of allowing the auger or gearbox to break.

Loading height 3.400 mm and three viewing windows

The top edge of the body is 3.400 mm high – suitable for the discharge pipes of common combine harvesters.

The three PLEXI viewing windows in the front wall show the driver the fill level while travelling. When transferring grain on the move, this is the only way to assess the level without turning your head.

Self-steering axle and parabolic suspension

The rear self-steering axle pivots with the turn. In the field, this protects the soil, because the wheels roll rather than scrub – and when manoeuvring at the field edge, it noticeably reduces the turning circle.

Optional weighing system

A 6-point weighing system with LCD display is available as optional equipment, together with a printer.

What it is used for: Recording the harvest quantity per field, settling contract harvesting work and providing proof to the buyer. With the printer, a receipt is produced directly at the field edge – without having to reconstruct the figures later in the office.

Work safety

• Non-slip floor grating along the inside of the hopper
• Folding access ladders on the outside of the rear wall and inside the hopper
• Platform at the rear wall

It may sound like a minor detail, but it is not: blockages in the auger channel are cleared by hand – and on a bin loaded to over three metres, safe access is essential.

Optional equipment

• EU or AT type approval, including documents
• K80 ball hitch
• Dual-line compressed-air brakes with ALB
• 6-point weighing system with LCD display
• Printer
• Telescopic PTO shaft with overload protection, 1 3/8" Z = 21 (no extra charge)
• Flexible discharge spout
• Roll-up cover
• Spare wheel
• Warning triangle for slow-moving trailers

The flexible discharge spout directs the flow of grain and reduces the drop height – reducing dust and broken grain when filling.

Applications

Harvesting grain, oilseed rape and maize; agricultural contractors and harvest cooperatives; large arable farms; seed production; farms using soil-conserving practices.

Operating notes

• Maintain a PTO speed of 1.000 rpm.
• Check the towing vehicle's drawbar load: up to 3.000 kg.
• For individual approval in Germany, select tyres in accordance with StVZO.
• The technically permissible 25.000 kg applies only to on-farm use.
• Check for overhead power lines and obstacles before swinging out the auger – the discharge opening is up to 4.850 mm high.
• Never climb into the hopper or clear blockages while the PTO is running.
• Before working in the hopper, disengage the PTO, stop the engine and remove the key.
• When changing varieties, empty and clean the bin completely through the inspection windows.
• Check the overload clutch regularly; repeated activation indicates a problem in the auger.
• When driving on the road, take account of the 2.960 mm width.

Frequently asked questions

What are the benefits of a chaser bin?

The combine keeps harvesting instead of waiting for a transport vehicle or driving to the field edge itself. Heavy transport vehicles also stay at the field edge, protecting the soil.

How quickly does the bin unload?

200 to 400 m³ per hour. The twin auger has two speed settings – the lower one handles delicate crops such as seed and malting barley more gently.

How high does the auger reach?

The discharge opening is between 4.550 and 4.850 mm high and is adjustable – so the auger reaches over the sides of farm trailers, lorry trailers and containers.

How much does the bin hold?

28 m³, with a payload of around 15.300 kg and a permissible gross weight of 23.000 kg. For on-farm use, a technically permissible weight of 25.000 kg applies.

Does the bin empty completely?

The trough-shaped floor guides the crop to two augers. Three inspection windows, the front one hydraulically operated, allow inspection and cleaning – essential when changing varieties.

Is a weighing system available?

Yes, a 6-point weighing system with LCD display is available as optional equipment, with a printer for receipts produced directly at the field edge.

What does the tractor need?

165 PS or 121,3 kW, a PTO running at 1.000 rpm and a hitch rated for a 3.000 kg drawbar load. A telescopic PTO shaft with overload protection is available at no extra charge.

What is the overload clutch for?

It protects the driveline if a foreign object jams in the auger – it slips instead of allowing the auger or gearbox to break.