John Deere J DOZERS 850J - Manual (Page 16)

Engine 750J 750J LT 750J LGP
Manufacturer and Model . . . . . . . . . . . . . . John Deere PowerTech TM 6068H John Deere PowerTech 6068H John Deere PowerTech 6068H
Non-Road Emission Standards . . . . . . . . . . certified to EPA Tier 3 emissions certified to EPA Tier 3 emissions certified to EPA Tier 3 emissions
Cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6 6
Displacement . . . . . . . . . . . . . . . . . . . . . . . 414 cu . in . (6 .8 L) 414 cu . in . (6 .8 L) 414 cu . in . (6 .8 L)
Net Peak Power (ISO9249) . . . . . . . . . . . . . 145 hp (108 kW) @ 2,100 rpm 145 hp (108 kW) @ 2,100 rpm 155 hp (116 kW) @ 2,100 rpm
Net Peak Torque (ISO9249) . . . . . . . . . . . . 494 lb .-ft . (670 Nm) @ 1,400 rpm 494 lb .-ft . (670 Nm) @ 1,400 rpm 548 lb .-ft . (742 Nm) @ 1,400 rpm
Aspiration . . . . . . . . . . . . . . . . . . . . . . . . . turbocharger air-to-air aftercooler air-to-air aftercooler
Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . dual-stage dry type with safety element, pre- dual-stage dry type with safety element, pre- dual-stage dry type with safety element, pre-
cleaner, and underhood restriction indicator cleaner, and underhood restriction indicator cleaner, and underhood restriction indicator
Slope Operation (maximum angle) . . . . . . . 45 deg . 45 deg . 45 deg .
Cooling 750J / 750J LT / 750J LGP
Variable-speed suction fan
Engine Coolant Rating . . . . . . . . . . . . . . . . –34 deg . F (–37 deg . C)
Powertrain
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; independently 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 and dozer push frames for
isolation from shock loads
Total Ratio . . . . . . . . . . . . . . . . . . . . . 46 .4056 to 1
Drawbar Pull
Maximum . . . . . . . . . . . . . . . . . . 55,000 lb . (244 .6 kN)
@ 1 .2 mph (1 .9 km/h) . . . . . . . . . 33,000 lb . (146 .8 kN)
@ 2 .0 mph (3 .2 km/h) . . . . . . . . . 22,000 lb . (97 .9 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 park brake feature engages wet, multiple-disc brakes whenever the engine stops, whenever the combined decelerator/brake pedal is fully
depressed, whenever the unit is in neutral for three seconds (with detected motion), or whenever the park lock lever is in the park position; machine
cannot be driven with brake applied, reducing wear-out or need for adjustments; spring-applied, hydraulic release
Hydraulics 750J 750J LT 750J LGP
Load sense, piston pump
Blade Type . . . . . . . . . . . . . . . . . . . . . . . . PAT Outside dozer PAT PAT
Pump (63 cc) . . . . . . . . . . . . . . . . . . . . . . . 38 gpm (144 L/m) 38 gpm (144 L/m) 38 gpm (144 L/m) 38 gpm (144 L/m)
System Relief Pressure . . . . . . . . . . . . . . . 3,625 psi 3,625 psi 3,625 psi (24 993 kPa) 3,625 psi (24 993 kPa)
(24 993 kPa) (24 993 kPa)
Differential Pressure . . . . . . . . . . . . . . . . . 275 psi (1896 kPa) 275 psi (1896 kPa) 275 psi (1896 kPa) 275 psi (1896 kPa)
Maximum Flow @ Unloaded High Idle . . . . . 37 gpm (140 L/m) 37 gpm (140 L/m) 37 gpm (140 L/m) 37 gpm (140 L/m)
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-bar hydraulic-pilot T-bar hydraulic-pilot T-bar hydraulic-pilot two-function joystick T-bar hydraulic-pilot two-function joystick
two-function joystick two-function joystick with push-button angle function with push-button angle function
with push-button
angle function
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . convective oil sump convective oil sump convective oil sump convective oil sump
PAGES
16–17
Specifications Specifications Specifications