1405 Stump-jump Soil Conditioner

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The 1405 is a 5-tine plow, cutting 3 metres (10ft) wide and capable of deep ripping to 750mm (30") deep. A very gradual angle of approach on the tine creates a >boiling= effect on the soil as it passes over the ripper shank. This is accentuated by fitting a twisted ripper point, curved to direct the clay to either side of the tine and create an even mixing effect across the whole machine. Ripper shanks are of a stump-jump design, to allow use of the machine in newly cleared forest country, or grazing land with old stumps still in place.
It is suited for use with a 95E Challenger tractor (410hp) at a working speed of 6-7kph.


  • Five, 2" x 6" curved ripper shanks with twisted shank plates.
  • 1-1/4" high-tensile base plate on body with 1-1/8" tine mount bolts.
  • 3-1/4" spherical bearings on tine pivot pins.
  • Stump-jump system with two, 2-1/2 gallon nitrogen accumulators.
  • Heavy-duty 4-1/2" x 12" displacement cylinders, with plain spherical bearings on shaft end.
  • Rear carriage with tandem flotation tires; 50 x 20.
  • Heavy-duty truck type wheel hubs with 4" axles and clamps.
  • Independent lift, front & rear, with two pairs of 5" x 12" lift cylinders. Lockout valves on hoses.
  • Heavy-duty swivel hitch on drawbar frame.
  • 1-3/4" pins attaching displacement cylinders to ripper shanks.
  • Weight - 6.5 tonnes.

The 1405 Soil Conditioner is matched to the power output of a 410hp Cat challenger 95E tractor.

Both the shanks and the flared shank-plates are designed to maximise the boiling effect of the soil over the shank and mix the clay all the way to the surface. 2" ripper points can be fitted for deep ripping and hardpan fracture.

Click on images to see larger versions.

Articles Relating to the 1405

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New Mounted Offset Disk
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Savannah tackles the ‘Non-Wettable Sands’
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