G.T. Bunning & Sons Ltd.

- Model Mk4 – 120 HBD - Medium Size Disc Spreader



Carrying capacity: 14 tonnes. Cubic meters heaped: 14.6m3 (at 30 degree angle to heap). Heavy duty fully welded construction. Dynamically balanced Horizontal Beaters. Rubber cushioned disc drive gearbox protection

  • Large diameter spinning discs with adjustable blade positions
  • Hardened Boron shredding blades
  • Automatic lubrication on beater drive-line
  • Long lasting composit floor shaft bearings
  • Floor protected by cross line relief valve
  • High torque hydraulic motor
  • Quick fit socket on full width floor slats
  • Calibrated grade 80 high tensile floor chains
  • Variable floor speed control
  • 1000 rpm PTO speed or 540
  • Single pole drawbar for tighter turning circle
  • Hydraulic brakes & handbrake
  • Full LED road lighting
  • Access ladder

Large diameter spinning discs.

Manufactured from HARDOX, the 1.1 meter diameter spinning discs are fitted with multi-position spreading blades. Blade angle is adjustable to achieve the correct spread patterns for a wide variety of materials. Spreading widths from 12 to 30 meters are possible depending on the density and nature of the product being spread.

Horizontal Beaters

Dynamically balanced and fitted with removable hardened Boron shredding blades the beaters are designed to process the toughest of materials and deliver a consistent flow to the spreading discs. To help increase the blades life the tips are also coated in an additional wear resistant material.

Floor shaft bushes

50mm floor drive shafts rotate through polyester re-inforced composite bushes that contain a solid graphite filler, chosen for their high load applications in a variety of environments they are greasable, further extending their life.  Bush highlighted in red.

Floor chains

Grade 80 16mm heavy duty chains are drawn by high tensile sprockets. Sprockets are fitted to the front floor shaft as well as the driven rear shaft, ensuring perfect alignment and timing of the chains, which, in turn makes for a more reliable floor drive.  Each chain has 32 tonne breaking load.

Full width floor slats

Full width floor slats clear the whole floor eliminating the possibility of bridging – a problem sometimes encountered with multi slat floor systems. The socket fit design facilitates maintenance, which can be carried out in the field. It also allows the chain to pull straight, should a slat become bent.

Floor drive gearbox

The 500 series floor drive gearbox is fitted to all models with the exception of the Lowlander 60 and 150 (fitted with 350 series and 800 series respectively). It is hydraulically driven to ensure an even feed of material to the spreading mechanism at all times. With a reverse feature, any foreign object too large to pass through the beaters can be easily removed. An adjustable crossline relief valve also delivers additional protection.

Adjustable drop on point

The lower section of the rear canopy is adjustable to help achieve the correct spread pattern with different products.

Heavy duty beater drive

The horizontal beaters are driven by heavy duty Renold roller chains which incorporate solid rollers and bushes. These are chosen for their unbeatable resistance to wear, fatigue and most of all shock loading. An automatic cam driven oiler keeps the chains and sprockets lubricated.

Adjustable blade position

To fine tune spread patterns the angle of the blades on the disc can be adjusted through 5 positions.

One piece disc drive gearbox

The heavy duty, one piece, disc drive gearbox has 54 mm diameter, heat treated output shafts. The precision machined gearbox castings ensure perfect alignment of all the drive line components.

RDS GT 400 weigh system

The GT 400 not only displays the live weight in the machine but also allows the operator to add the total weight up by pressing the start/stop button after every load. This simple weigh unit can be fitted through the whole range of Bunning muck spreaders from the 60 to the mammoth 380HD.  The system is integrated with the same load cells as used on the popular and proven RDS Apollo psi indicator.

300mm Built In Flared Extensions

Built in flared extension sides add considerable carrying capacity to machines, spreader design load capacity should be checked relative to the density of the material to be carried. This option is not available for machines that are to be containerised for transport, the bolt on option should be specified.

Hydraulic Border Spreading Deflector

This deflects the material down to the ground and limits the spread width on one side. This prevents material being spread through hedges, into water courses, etc.

LED Strobe/Flashing Lights

These ultra bright LED flashing/strobe lights are fitted as a pair and give a highly visable warning.

LED front & rear Mudguard marker lights

These bright LED marker lights are fitted to the front & rear of the mudguards and give a positive marker to the overall width of the machine.

Steel Mudguards

Made from rolled 4mm steel, these mudguards follow the tyre radius and will help keep the side of the machine clean

Non Standard Colours

While Bunning Blue or Bunning Green are our standard colours. From a BS or RAL number we can paint your machine in almost any colour.

Weigh cells with automatic rate control

The RDS Apollo spreader controller has all the features for today’s farming techniques. Target application rate is entered into the controller which then monitors the load and adjusts the floor speed accordingly. GPS variable rate technology is supplied as standard and the system can receive an application rate from a third party controller such as John Deere Greenstar, Raven or Trimble. Or a predefined application map can be loaded to the SD card and automatically vary the rate (Precision Farming). Data can be logged via the optional printer

or saved to a SD card, which can then be exported to an Excel spreadsheet along with treatment maps.  Live weighing is via 20 tonne weigh cells situated on both axle and drawbar. This is then clearly viewed on the controller screen together with your speed, target rate and live application rate. There is a choice of either using the machine in ‘Automatic or Manual Control’ depending on your requirements.

Air brakes

A choice of either 2 Line Air Only Brakes or Dual Supply (2 Line Air and Hydraulic) Brakes.

Slurry door height indicator

This options allows the operator to monitor door opening positions in relation to application rates

Printer for PSi Apollo Spreader Controller records

This compact printer is connected to the RDS Apollo Controller and produces a receipt which can be printed off showing Start & Finish Time, Job Number, Farm & field Number, Target Rate, Total Area and Total Weight. This can be kept for your records or supplied to your customer as a receipt for work complete.

Steel PTO guard

This option is designed to protect the PTO shaft from damage by the tractors lift arms.

Tool box

A robust item designed with a sloping lid to reduce the build up of material

Wide angle PTO assembly

The wide angle joint allows for turning on headlands with the PTO still engaged. It should be noted that the manufacturers recommend that you do not turn with the PTO under load.

Double acting Hydraulic guillotine slurry door (End Gate)

An extremely strong design and construction ensures that the door can be used as a grading device for light applications of materials as well as a device for retaining very running products.

Build weigh cell ready

As an option the machine can be manufactured to take weigh cells at a future date. The dummy weigh cells can be easily removed and replaced with full weigh cells.

In cab electric floor speed control

The in-cab electric remote floor speed control allows the operator to make adjustments to the floor speed while on the move.

Hydraulic opening rear canopy

As an option the rear canopy can be opened hydraulically to enable the machine to make windrows for composting or for ease of maintenance. Safety props are supplied and should be used prior to carrying out maintenance.

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