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Engine 850J / 850J LT / 850J WT / 850J WLT 850J LGP
For use in U.S., For use outside U.S., For use in U.S., For use outside U.S.,
Canada, and Europe Canada, and Europe Canada, and Europe Canada, and Europe
Manufacturer and Model ..............John Deere PowerTech
TM
Plus 6090HT John Deere PowerTech 6081 John Deere PowerTech Plus 6090HT John Deere PowerTech 6081
Non-Road Emissions Standards. . . . . . . . . EPA Tier 3 / EU Stage IIIA EPA Tier 2 / EU Stage II EPA Tier 3 / EU Stage IIIA EPA Tier 2 / EU Stage II
Cylinders ..........................6 6 6 6
Displacement . . . . . . . . . . . . . . . . . . . . . . 550 cu. in. (9.0 L) 496 cu. in. (8.1 L) 550 cu. in. (9.0 L) 496 cu. in. (8.1 L)
Net Peak Power (ISO9249) . . . . . . . . . . . . 185 hp (137 kW) @ 1,800 rpm 185 hp (137 kW) @ 1,800 rpm 200 hp (152 kW) @ 1,800 rpm 200 hp (151 kW) @ 1,800 rpm
Net Peak Torque (ISO9249) ............611 lb.-ft. (828 Nm) @ 1,500 rpm 590 lb.-ft. (800 Nm) @ 1,400 rpm 675 lb.-ft. (915 Nm) @ 1,500 rpm 650 lb.-ft. (880 Nm) @ 1,400 rpm
Aspiration . . . . . . . . . . . . . . . . . . . . . . . . . turbocharger and air-to-air aftercooler turbocharger and air-to-air aftercooler turbocharger and air-to-air aftercooler turbocharger and air-to-air aftercooler
Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . dual-stage dry type with tangential dual-stage dry type with tangential dual-stage dry type with tangential dual-stage dry type with tangential
unloader unloader unloader unloader
Slope Operation (maximum angle) .......45 deg. 45 deg. 45 deg. 45 deg.
Cooling 850J / 850J LT / 850J WT / 850J WLT / 850J LGP
Variable-speed suction fan
Engine Coolant Rating ................–34 deg. F (–37 deg. C)
Powertrain 850J 850J LT 850J WT 850J WLT 850J LGP
Transmission ......................automatic, dual-path, hydrostatic drive; load-sensing feature automatically adjusts speed and power to match changing load conditions; each individually controlled
track is powered by a variable-displacement piston pump and motor combination; ground-speed selection buttons on single-lever steering and direction control; inde-
pendently selectable reverse speed ratios 80%, 100%, 115%, or 130% of forward ground speed; decelerator pedal controls ground speed to stop
System Relief Pressure . . . . . . . . . . . 6,650 psi (45 850 kPa)
Travel Speeds
Forward and Reverse .........6.3 mph (10.1 km/h)
Maximum (optional) . . . . . . . . . . 6.8 mph (10.9 km/h)
Steering ..........................single-lever steering, speed, direction control, and counterrotation; full power turns and infinitely variable track speeds provide unlimited maneuverability and optimum
control; hydrostatic steering eliminates steering clutches and brakes
Final Drives . . . . . . . . . . . . . . . . . . . . . . . double-reduction, planetary final drives transfer torque loads over three gear sets; mounted independently of track frames double-reduction (spur gear set and
and dozer push frames for isolation from shock loads planetary) transfer shock loads; mounted
independently of track frames and dozer
push frames for isolation from shock loads
Total Ratio .....................44.7483 to 1 44.7483 to 1
Drawbar Pull
Maximum ..................77,300 lb. (344 kN) 77,300 lb. (344 kN)
@ 1.2 mph (1.9 km/h) . . . . . . . . 37,500 lb. (167 kN) 40,000 lb. (178 kN)
@ 2.0 mph (3.2 km/h) . . . . . . . . 27,000 lb. (120 kN) 29,500 lb. (131 kN)
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . decelerator/brake pedal; automatic power management with manual override for matching ground speed
Service Brakes .. . . . . . . . . . . . . . . . . . . hydrostatic (dynamic) braking stops machine when the direction/steering control lever is moved to neutral or the decelerator is depressed to the end of travel
Type . . . . . . . . . . . . . . . . . . . . . . . . . hydraulic
Parking Brakes . . . . . . . . . . . . . . . . . . . . exclusive safety feature engages wet, multiple-disc brakes whenever the engine stops, whenever the decelerator is depressed to the end of travel, or whenever the
park lock lever is placed in the start or neutral position and motion is detected; machine cannot be driven with brake applied, reducing wear-out or need for adjustment;
spring-applied, hydraulic release
Hydraulics
Load sense, piston pump
Blade Type . . . . . . . . . . . . . . . . . . . . . . . . Outside dozer PAT Outside dozer PAT PAT Outside dozer
Pump (74 cc). . . . . . . . . . . . . . . . . . . . . . . 46 gpm (174 L/m) 46 gpm (174 L/m) 46 gpm (174 L/m) 46 gpm (174 L/m) 46 gpm (174 L/m) 46 gpm (174 L/m)
System Relief Pressure ...............3,625 psi (24 993 kPa) 3,625 psi (24 993 kPa) 3,625 psi (24 993 kPa) 3,625 psi (24 993 kPa) 3,625 psi 3,625 psi
(24 993 kPa) (24 993 kPa)
Differential Pressure . . . . . . . . . . . . . . . . . 275 psi (1896 kPa) 275 psi (1896 kPa) 275 psi (1896 kPa) 275 psi (1896 kPa) 275 psi (1896 kPa) 275 psi (1896 kPa)
Maximum Flow @ Unloaded High Idle ....43 gpm (163 L/m) 43 gpm (163 L/m) 43 gpm (163 L/m) 43 gpm (163 L/m) 43 gpm (163 L/m) 43 gpm (163 L/m)
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . T-bar hydraulic-pilot two- T-bar hydraulic-pilot two- T-bar hydraulic-pilot two- T-bar hydraulic-pilot two- T-bar hydraulic- T-bar hydraulic-
function joystick function joystick with push- function joystick function joystick with push- pilot two-function pilot two-function
button angle function button angle function joystick with joystick
push-button
angle function
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . convective oil sump convective oil sump convective oil sump convective oil sump convective convective
oil sump oil sump
PAGES
20–21
Specifications
Specifications
Specifications