PRODUCTIVITY AND DURABILITY - KEY FEATURES OF JOHN DEERE’S NEW L-SERIES SKIDDERS
The year 2015 marks the Golden Jubilee for John Deere Skidders, ever since the Moline-based company built its first Skidder, the model 440 back in 1965.
In celebration of this important milestone, the company has hit the market with its brand new L-series Skidders of which two models, the John Deere 640L Cable and 648L Grapple Skidders, have just been introduced to the Southern African forestry market.
The new product line was launched in the USA in April 2015 and Southern Africa followed that launch, before the machines are introduced to the Australian and New Zealand markets.
“This is a completely new Skidder, designed and built on a brand new platform, which comes to the market after many thousands of hours of listening to what customers wanted,” says Simon Shackleton, General Manager Forestry: Asia Pacific and Africa for John Deere. “It was also designed to keep pace with the emergence of higher-tiered engines and the need to keep John Deere at the forefront of timber harvesting technology, where it is recognised as being a world leader in the field.”
The new machines are packed with new features and improvements, which says a lot as previous models were known to have set the benchmark amongst Skidders. Engine capacities and power have been increased and grapples are bigger, both features are designed to increase productivity and reduce the overall cost per tonne.
“The big feature, which points to some innovative thinking by the John Deere designers, is the use of the Continuous Variable Transmission (CTV),” says Brandon O’Neal, John Deere’s Product Marketing Manager. “This easy-to-use CVT transmission combines the smoothness and operating ease of a hydrostatic transmission with the fuel efficiency of a lockup torque converter.”
What this means in practice is that the CVT transmission enables a constant engine speed, so reducing engine wear while ensuring excellent fuel economy. The system is easy to operate and eliminates “shift shocks” due to surging rpm. Once the maximum speed is set, the transmission does the rest and avoids a hunt for the correct gear.
“The CVT automatically senses the load and delivers the toque and tractive effort that is needed to maintain the desired speed,” O’Neal adds. “Because the engine is running at a constant 1 800 rpm, it enables optimal multi-functioning performance and lower fuel consumption.”
Derek Howe, Bell Equipment’s General Manager: Forestry, Sugar and Agricultural Sales is equally enthusiastic when he speaks of the improvements on the designs of the John Deere 640L and 648L Skidders. “Bell Equipment was included in John Deere’s customer input process and we were able to give input into the design of this new machine. We are happy to see that the cab on the new machines has been enlarged by at least 25% and is twice as quiet. The ergonomics have been vastly improved with better all-round visibility for the operator, brought about by a rotating seat, joystick steering and a much larger rear window. The greatest impact on operating this new Skidder due to various innovations, particularly the CVT transmission, is the improved cycle times, leading to improved productivity and a reduction in the cost per tonne.”
Howe also points out that the grapple is much larger and now boasts an opening of some 3 345mm, and capacity of 1.48m2 which greatly enlarges the load capacity compared to the G & H series machines. Howe adds that with more mechanisation taking place in timber harvesting worldwide, bigger and stronger machines generally mean more cost-effective performance.
“In timber felling and extraction operations, you typically find that a Grapple Skidder would be used in conjunction with a Feller-buncher while a Cable Skidder would normally be used where hand felling is done,” he says. “To further enhance the multitasking role of a John Deere 648L Single or Dual Arch Grapple Skidder, it comes standard with a winch and can accommodate a combination of winch and grapple to add to the machine’s versatility.”
The Southern African launch of the L-series John Deere Skidders was held at the Kwanyoni Lodge near Nelspruit on 1 July 2015. Present prospective owners of John Deere Skidders and other timber harvesting equipment attended and could get first hand information from the many knowledgeable John Deere and Bell Equipment personnel at the event.
One such owner is Rance Timber near Stutterheim in the Eastern Cape. Rance Timber is awaiting the delivery of a new John Deere 640L Cable Skidder.
“We currently run five John Deere 540 Cable Skidders of which the older two have done in excess of 10 000 hours and the newest one around 2 500 hours of service,” John Rance (Jnr) says. “Our harvesting management has, with assistance from Derek Howe, successfully reduced our harvesting teams from eight to five over the past two years. We believe that with the new John Deere 640L Cable Skidder being added to our fleet, further cost savings and improved productivity is imminent.”
Some of the outstanding features the new John Deere 640 & 648L-series bring to the market are:
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- Continuous Variable Transmission (CTV) which provides maximum pulling power at all speeds with unmatched fuel efficiency
- More robust, heavy-duty axles with continuous lube system which improves durability and extended life
- Grapples are larger and cover a wider area
- The new cab is 25% larger and twice as quiet
- The rear window is 75% larger
- Armrest-mounted controls, joystick steering and an optional rotating seat providing smooth, low-effort operation and reducing operator fatigue
- Higher horsepower 6,8 litre diesel engine, which runs at a constant speed, boosting performance and dependability while reducing component wear. Tier ll emissions rating will be standard engine supplied for the local and other international markets outside North America and Europe.
- An independent axle difflock allows the operator to engage all four wheels or just the front or the rear as needed
- Straight bushings at all grapple, arch, boom and blade joints deliver longer life
- Grease-through pins ensure even lubrication and are more resistant to dust, rust and debris
- The beefier roller-bearing articulation joint has been updated for longer life and boom-arch hoses have been rerouted inside the arch where they are better protected and can be easily accessed for faster repair
- The number of switches and relays has been reduced and diagnostic software makes troubleshooting easier for the operator, machine owner and dealer.