John Deere Final Tier 4 Dozers
The John Deere 750K and 850K Crawler Dozers meet Final Tier 4 emissions standards and incorporate value-enhancing features such as EcoMode and an updated Electro-Hydraulic (EH) control system. The K-Series crawlers provide contractors a Final Tier 4 product that affords higher productivity, increased uptime and lower daily operating costs, the company says.
According to Mark Oliver, crawler dozers product marketing manager, John Deere Construction & Forestry, while updating the engines, "we also added some new features customers will appreciate. The electro-hydraulic system has been updated and the control logic of that system is brand new from John Deere. When the optional EH system is ordered, customer driven features such as blade shake for PAT (Power-Angle-Tilt) configurations, improved blade response and rear auxiliary configurable settings will help customers become more productive. EH controls are now available for OSD (Outside Dozer) configurations which also enable the new optional Power Pitch feature.”
The 750K and 850K incorporate a PowerTech 6.8-L Final Tier 4 diesel engine with 165 hp and 205 hp respectively. The 850K is the first John Deere dozer to feature EcoMode. EcoMode optimizes fuel economy while maintaining ground speed by automatically adjusting engine speed and transmission settings based on load. This new feature has the potential to save customers upwards of 20 percent in fuel with no loss in productivity in many applications.
Owners don’t have to worry about diesel particulate filter (DPF) cleaning as it still occurs automatically with no impact to machine operation. Extensive testing allowed John Deere’s DPF to go up to 15,000 hours before ash removal. Additionally, all models feature excellent total fluid economy (diesel fuel and DEF).
Machine hydraulics were updated for improved performance and responses as well as offering optional electro-hydraulic controls for both the Power-Angle-Tilt and Outside Dozer blade configurations. A high flow hydraulic pump is now available for both pilot controls and the updated electro-hydraulic system. The EH system is more responsive to operator inputs and the machine will significantly grade better when equipped with a grade control system.
The 750K and 850K come equipped with John Deere’s exclusive V-Cool package. This system incorporates a cool on demand hydraulically driven fan that isolates coolers from dust and engine heat for increased efficiency and durability. In addition, the V-Cool is positioned behind the heavy-duty grille and fan, making the coolers less vulnerable to the rigors of the jobsite. The coolers are also easily accessible for ground level service.
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