Having almost completed a full season, clocking up more than 1,350 hours, it is safe to say the honeymoon period is well and truly over for Honingham Thorpe Farms’ John Deere 9570RX.
The 570hp frontline power source is the latest in a long line of rubber-tracked machines which have been relied upon over a 20-year period, as farm manager Jamie Lockhart explains.
“Honingham is no stranger to rubber-tracked power,” he says. “Over the years, we have had a Cat 85C, a Case IH Steiger 9380, STX440, STX450, a Challenger 865C, and latterly, two further Case IH STX450s – our latest being a Tier 4 model.
“What we have learnt is twin track machines just do not work for us. We need horsepower, but we also need weight to make the most of the horsepower.”
Based at Colton, Norwich, Honingham Thorpe Farms works 2,400 hectares (5,930 acres), comprising 1,600ha (3,953 acres) of winter- and spring-sown combinable crops, 200ha (494 acres) of potatoes, 250ha (618 acres) of AD maize, 80ha (198 acres) of onions and a small area of sugar beet.
About 800ha (1,978 acres) is located at Home Farm, with the remainder a mix of contract farming agreements extending up to 25 miles from Colton.
Soil types range from sandy loams to clay and the farm’s cultivations regime sees a mix of min-till and plough-based strategies used for seedbed preparation.
It is a workload which puts a lot of emphasis on machine reliability and the performance and productivity placed on the sole frontline power unit.
He says: “We are putting about 1,300-1,500 hours each season on our primary cultivations tractor. And where that tractor would have then been replaced outright, we have opted to extend their working life in a secondary role to support and back-up the main tractor.
“This has been done to spread our risk of relying solely on one rubber-tracked machine for heavy work and it helps to reduce running costs and sweeten the depreciation pill.”
The arrival of a John Deere 9570RX last July marks something of a sea change at Honingham, as the farm once relied entirely on a Case IH Quadtrac.
However, Mr Lockhart says over the years the Quadtrac’s operating costs and its running gear have proved something of an Achilles’ heel, ultimately prompting the farm’s switch from red to green.
He says: “We used to have little choice when it came to big horsepower, although Deere’s introduction of the 9RX has changed this – we now have an alternative option.”
Mr Lockhart says while cost is king, service back-up comes a close second.
He says: “We heard about the 9RX two years ago, although it meant running our 2012 Quadtrac STX450 frontline tractor for an extra year.
“We did look at a Versatile, and while its running gear is a big improvement over the Quadtrac, cab comfort is still a long way behind where it needs to be.
“When we found out Deere was using similar running gear to the Versatile, we decided to wait for the 9RX. It has a Cummins engine and Delta-track running gear – what is not to like.”
In addition, Mr Lockhart says the 9RX was competitively priced.
“There was little between a 9520RX and a Quadtrac STX500, but in the end, we chose to up the power level for the future, settling on a 9570RX with its 15-litre Cummins engine.
“Our plan is to run the 9RX for three years, then it will become the back-up tractor, replacing the STX450, where it should run a further three years and perhaps complete about 7,000 hours in total.”
Key tasks for the 9570RX include ploughing with a 19-year-old Kverneland RX100 11-furrow reversible, cultivating with a 6.3-metre Gregoire Besson Discordon and subsoiling with a nine-leg Cousins Patriot.
The 9RX also handles the bulk of the farm’s drilling, with an 8m Vaderstad Rapid. But when conditions dictate, a home-built 6m power harrow drill combination comes into play.
Mr Lockhart says: “With two rubber track machines we have options. We also have a weather-proof seedbed system for later in the year, from ploughing and drilling together.”
Our plan is to run the 9RX for three years, then it will become the back-up tractor
Operator Paul Lawn, who has spent the last 37 years with Honingham Thorpe Farms, 20 of which have been in the cabs of the business’ rubber-tracked machines, is well placed to make an informed judgement on the market’s new contender.
He says: “I do like the cab comfort and visibility of the Deere. The engine intake and exhaust systems have been carefully placed to sit behind the cab’s A-posts. They do not obscure your view in the same way those on the Quadtrac do.”
He adds the 9570RX is the most comfortable tracked machine he has ever driven: “It rides well either in-field or on the road.”
However, control integration is not yet quite what it should be, Mr Lawn says. “We are having to supplement the 4600 touchscreen terminal with a 2630 terminal to make sure we can send field documents directly to the office. It just lacks the complete level of sophistication we need, but we are told it is being worked on.
“My preference is to have one screen in the cab which is capable of doing everything. We want to make the most of telematics, as field data and tractor information is invaluable for cost management.”
Mr Lawn says the tractor’s 628hp maximum power has put him comfortably on top of tasks currently carried out.
“We do have power in reserve, which is important when weather conditions put the pressure on. We can make the most of the resources we have and keep our output up.”
Despite the added performance of choosing the Cummins-powered 9570RX over the 13-litre engined 9520RX, he says the farm is not suffering a fuel penalty.
As this autumn’s workload has proved, fuel use is quite the opposite, with the Deere using much less fuel than the STX450 doing the same jobs.
“We are using four litres/hectare less fuel when ploughing and more than six litres/ha less fuel when drilling. The tractor has so much grunt I do not need to lean too hard on the throttle.”
Mr Lawn says while the 9570RX is so far proving itself to be the best of the bunch, it is not perfect.
He says: “The decelerator is useless. It is not a pedal you can control, it is just a switch. After using a decelerator pedal for many years, this is a waste of time.
“If you go over any bumps, your foot can easily bounce on and off the switch. It really should be a pedal so you can control the engine more smoothly on headland turns.”
And like most tractors, the standard toolbox is inadequate, leading Mr Lawn to fabricate his own lockable box which is bolted onto the front frame beneath the cooling pack mesh.”
He has also added a rear-view camera on the three-point linkage to make hitching up safer and easier - something he believes Deere should fit as standard.
Engine: Cummins 15-litre QSX
Rated power: 570hp
Maximum power: 628hp
Transmission: e18, full powershift with efficiency manager
Track width: 762mm (30in) Camso belts
Weight: 27 tonnes
Fuel tank: 1,490 litres