CHASER BINS

A chaser bin, or grain cart, is a farm implement towed behind a tractor that receives grain directly from a combine harvester's auger, enabling the harvester to keep moving without stopping to unload. The bin has a built-in discharge auger (typically hydraulically controlled and driven by tractor PTO) to transfer grain into silos, mother bins or waiting semis. Chaser bins range in capacity from around 18T to 60T depending on the model.

Our bins range in capacity from 33,000 L to 60,000 L.

As crops vary in size and density according to variety and moisture content, exact bin capacities by weight will vary.

Please refer to our Grain Weight and Density Chart to determine exactly how much crop your chaser bin can hold.

For example, our 35T bin can hold approximately 46,000 L. When filled with a typical Australian wheat variety, this translates to 35 tonne. However, when filled with certain fertilisers, the load could weigh up to 46 tonne! The undercarriage of our dual axle chaser bins are rated up to 80 tonnes to safely accommodate a large range of crops and fertilisers.

We recommend getting a slightly larger bin than you think you need. Factors that determine the size of bin you need are:

• Harvester Capacity: A chaser bin should be able to accommodate the volume of crop harvested before it needs to unload.
• Field Size: The size of your fields and the distance to the nearest storage or unloading point will affect the size of the chaser bin needed. Larger fields or longer distances may require a larger bin to minimise downtime for unloading.
• Crop Type and Yield: Different crops have varying densities and yields. Choose a bin size that can handle the volume efficiently. Our Grain Weight and Density Chart can help you determine what size chaser bin you require.
• Transportation and Logistics: Consider the size and capacity of the equipment you'll use to transport the chaser bin, as well as any logistical constraints on your farm or operation.
• Future Growth: Anticipate potential increases in farm size or changes in cropping practices that may affect your chaser bin needs in the future.

Our team is always ready to help you find the best bin for your needs.

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Yes. Davimac bins have been built with the farmer in mind and feature simple and reliable operation without complex parts that increase the points of failure.

They are easy to maintain and service with user-replaceable bolt-on parts, easy access to grease points, easy internal bin access and simple cleanout with all doors operated via a single easy-to-access lever.

Spare parts are easily obtained via our online parts store.

Yes. A chaser bin can be used for many different purposes including but not limited to:

• Harvesting grains, corn, rice, beans, peas, sorghum, oilseeds and other crops.
• Many farmers use their bins to carry fertiliser around their farm or even animal feed.

Our auger hopper feed-out chute increases the versatility of the bin, enabling its contents to be spread around your farm. Your chaser bin can be used all year round, not just at harvest, maximising your return on investment.

You can price and configure a Davimac chaser bin using our 'Build a Bin' configurator tool.

Davimac chaser bins can be customised to suit your farm and workflow. Customisations include:

• Right hand discharge
• Custom red or green paint finishes
• Hydraulic drive
• Auger extensions
• Steering axles
• Hydraulic Brakes
• Third-party track systems

Additionally, chaser bins can be fitted with a range of options including:

• Larger or flotation tyres to minimise compaction
• Rear towing hitch
• Cameras to see into or behind the machine
• Weigh scales with wireless connection to real-time harvest software
• Fire-fighting units or extinguishers
• Auger hopper chute

Davimac 25T, 30T and 35T bins feature a 20" auger that can unload grain up to 12-tonne per minute.

45T models feature a 24" auger that can unload at 18-tonne per minute.

Note: Speeds are applicable for PTO-driven augers at 1000 RPM.

Soil compaction occurs when heavy machinery "compacts" the soil into hard layers which affects the soil's water filtration and crop root penetration.

Davimac chaser bins minimise the impact of soil through:

• 3.0m Controlled Traffic Farming compatible wheel centres.
• Rear-steering axle on larger models minimises soil smearing and reduces turning radius.
• Wide tyres help spread the load over a larger area.
• Flotation tyre options feature special treads that reduce soil displacement and perform well in both wet and dry conditions.
• Davimac chaser bins are compatible with third-party track systems, but are not officially supported by Davimac.

An undercarriage failure during harvest would be catastrophic.

For smaller bins up to 35T, our floating walking beam undercarriage remains the ideal choice – simple, ultra-robust, and with fewer moving parts for maximum reliability during harvest.

For heavier loads and larger capacities, such as our 45T model, we now offer a rear steering axle built to Davimac’s standards – engineered for strength, using a 12-stud hub (well above the industry-standard 10-stud) to reduce the risk of rim or hub failure, and rated to handle the toughest field conditions without compromise.

A steering axle improves manoeuvrability in tight paddocks and gateways, and reduces tyre scrub and soil disturbance when turning under heavy load.

While not essential for smaller bins, it’s a valuable upgrade for operators running larger capacity chaser bins.

Yes. Davimac chaser bins are compatible with certain universal track systems, but these must be sourced and fitted directly through the track supplier and may require custom parts to be manufactured. Davimac's warranty does not extend to third-party installed track systems.

The weight of the tractor is more critical than the hp.

The below values should serve as a guideline only and will vary depending on true crop weight.

Minimum tractor horsepower guide for towing a full load of wheat:

• 25T - 260 hp or greater
• 30T - 310 hp or greater
• 35T - 360 hp or greater

NOTE: Operators must ensure their tractor has adequate weight, power, and towing capacity before hitching to the chaser bin. Maximum tow capacity is generally documented in your tractor's user manual.

Whether brakes are fitted may also change tractor size requirements, and most Australian States have rules defining the maximum tow vehicle-to-trailer weight ratio for towing heavy farm machinery on the road versus in the paddock.

See 'Do I need brakes' or visit the link above for more information.

Davimac chaser bins can be optionally fitted with a 500 RPM hydraulic drive for older tractors or tractors without PTO.

Please note that:

• Hydraulic drive will significantly reduce the output speed of the discharge auger when compared to PTO driven.
• An additional tractor high-flow remote is required.

Davimac wheeled bins require a minimum of three (3) hydraulic remote outlets to control all features of the bin, including grain flow doors, auger unfold, and hydraulic auger spout.

For bins fitted with a hydraulic drive motor, an additional high-flow remote is required.

Hydraulically controlled options such as a disc brakes, lockable steering axle, hydraulic hopper chute, or third-party track systems also require additional remotes.

Davimac chaser bins come with a swivel tow eye hitch with swappable balls to change the hitch's receiving diameter to either 44.5mm (1 3/4") or 52mm (2"). This enables a better fit for a wider range of tractors with differing pin sizes and helps reduce shunting.

We offer three different 2-pack paint finishes to match the chaser bin colour to other popular farm machinery brands in Australia.

Bins are available in the following colours:

• Davimac Blue (standard)
• Custom Red
• Custom Green with yellow hubs

Research has shown that up to 7% of combine harvesters will start a fire each year.

As chaser bins are often 'on the spot' during harvest, and quick action is critical in the event of a fire starting, we recommend fitting a firefighting unit with water tank, pump and hose to your chaser bin for immediate response to a harvest fire.

Resources:

GRDC Reducing Harvest Fires Handbook

NSW Rural Fire Service Harvest Fire Safety

Brakes are generally not a standard requirement for chaser bins within most Australian states (check your local State laws). However, brakes can significantly improve the safety and performance of your chaser bin, especially on hills and non-flat country.

Note: Whether brakes are fitted determines the maximum tow speed and minimum tow-vehicle weight. See 'Tow mass restrictions for agricultural combinations' from the Australian National Heavy Vehicle Regulator (NHVR).

Complying braking system:

For agricultural combinations where all towed implements and/or trailers comply with Australian Design Rule 38/00 – Trailer Brake Systems, the towed vehicles may have a combined total mass up to 3 times the mass of the towing vehicle. For example, for an agricultural combination where all units have complying brakes, if a tractor has a GVM of 10 tonnes, it may tow trailers with a combined GVM of up to 30 tonnes (i.e. a tow mass ratio of 1:3).

Non-complying braking system

If an agricultural combination includes at least one implement or trailer that is not compliant with Australian Design Rule 38/00 – Trailer Brake Systems, the combination must travel at a maximum speed of 25km/h in any zone and the towed mass ratio of the combination may be greater than 1.2 and up to 1.5 times more than the mass of the towing vehicle (that is 1:1.2 up to 1:1.5).

Yes. Davimac chaser bins come standard with our road transport kit that features the required signage, lights and flags to enable towing on public roads.

Operators must follow the requirements from the respective State or Territory when towing oversize farm implements and agricultural machinery on public roads.

Our 25-35T bins fit within the NHVRs 3.5m width limitation (when wheels are in the 2.54m retracted position) for daytime transport without an escort. Appropriate oversize signage is required.

45T bins with fixed 3.0m wheel centres require an escort within NSW.

NOTE: Check your local state's road rules before relocating your chaser bin.