With the potential to cut 60 hectares/day (150 acres/day), a second-hand triple mower offers high-output for those seeking a cost-effective efficiency boost. Geoff Ashcroft takes a look at Krone’s EasyCut 9140CV.
Krone’s EasyCut 9140CV scythed its way through fields in 2006 with its 8.7-metre working width, before being replaced by the wider B1000 in 2014. The latest model brings its own on-board hydraulic system and IsoBus controls to boost operational efficiency.
But for those happy with spool valves, a second-hand 9140CV could prove a shrewd investment for the canny buyer. But what can you expect?
The rear butterfly assembly used a pair of 3.14m beds carried on a three-point linkage mounted frame. Each bed carried seven discs, with each disc equipped with two quick-release blades.
Conditioning rotors used free-swinging steel V-tines arranged in a helix pattern on the rotor. Optional spreading vanes could be fitted to the rear hood, giving the ability to leave the mown crop spread out.
For a 2012 9140CV, expect to pay about £10,000-12,000.
While the choice of front mower is entirely at the buyer’s discretion, most 9140CV’s were sold with Krone’s 32CV front-mounted mo-co. It used the same 3.14m wide bed, but with an A-frame headstock for mounting.
As a push-type front mower, it came with its own dedicated top link which contained a spring and damper to offer contour following ability, plus anchor points for depth stop chains.
Krone’s 9140CV mower bed was a sealed for life design, painted inside and out, and pressure treated before it left the factory to ensure its integrity. As such, you should not need to worry about oil changes, says Gary Pettett, the firm’s South East after sales manager.
The entire triple mower assembly was shaft and gear driven – with no belt used on this machine. There were slip clutches though, to take care of over-load scenarios, which you will find on the pto drives.
Other than greasing requirements and perhaps annual oil changes for all gearboxes, little maintenance was required.
Discs were equipped with the firm’s SafeCut system – a safety mechanism which used a roll pin as the weak link between disc and bed. Should a disc overload occur, the roll pin would shear, leaving the disc free to rise 10mm, preventing neighbouring blades from coming into contact with each other.
Blades were able to spin 360-degrees in their holders, and the skids beneath the bed were a bolt-on item, should excessive wear occur.
Crop lifters could also be bolted on top of each disc for those struggling to get their blades under laid rye-grass crops.
Krone says the filler pieces between the front of each skid were replaceable, using weld-in items.
Krone’s V-tine is a free-swinging steel tine. In most circumstances and crop types, it is all you will ever need says Mr Pettett. But in some crops, particularly rye-grass, it can pose a problem with crop flow.
A solution was Krone’s optional solid V-tine, which created more draught. And fitting these in place of every other conventional V-tine would give the increased airflow required to deal with laid crops.
Conditioner hoods could be adjusted closer to the tines too, and this adjustment is required as tine length wears down, says the firm. Each rotor gearbox offers two speeds – 600 and 900rpm – and a lever allows easy change of speeds.
Typically, mowers can suffer from a lot of vibration, particularly as blades and tines wear. So pay attention to the entire framework for signs of cracking.
Take care to ensure the front mower unit’s swath curtain is secured in its working position with a bungee cord, or the draught from the conditioner rotor will suck it in and destroy it.
Rear lighting frame might look excessive, but it also doubles as the rear parking stand. Operators advise you attach the front mower before hitching up to the rear butterfly unit, simply because of its overall weight. Detaching is a reversal of the process.
Beware when mounting the 32CV front mower to certain tractors, as some front link arms can be too short. To get round this, you will need Krone’s lift-arm extenders to ensure the swath deflection boards do not get clobbered by the front wheels when turning.
When in work, rear beds had their ground pressure set by pairs of springs anchored on the headstock. Stubble height was adjusted by lengthening or shortening the top link to achieve the desired finish, and is one reason why many operators run with a hydraulic top link.
End guards are a simple fold-up/fold-down design, though their rubber retaining cups and cones do perish. Expect to replace them if the guards will not stay up during transport.