John Deere 850C WT User Manual

850c

850C

Engine

850C

Type ................................................................................................John Deere 6081A with altitude-compensating turbocharger; aftercooled
Engine power ..................................................................................185 SAE net hp (138 kW) / 192 SAE gross hp (143 kW) @ 1,800 rpm
Cylinders .........................................................................................6
Displacement ..................................................................................494 cu. in. (8.1 L)
Fuel consumption, typical ................................................................4.6 to 7.0 gal./hr. (17.4 to 26.5 L/h)
Maximum net torque .......................................................................601 lb.-ft. (815 Nm) @ 1,300 rpm
Lubrication ......................................................................................pressure system with full-flow spin-on filter and oil-to-water cooler
Air cleaner.......................................................................................dual stage dry type with safety element, precleaner, and underhood restriction indicator
Electrical system .............................................................................24 volt with 45-amp alternator
Cooling fan ......................................................................................blower

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 displace-

ment piston pump and motor combination; travel speeds (forward and reverse) infinite to 6.8 mph (0 to 11 km/h); 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 dead stop

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

Steering

single-lever steering, direction, and ground-speed control provides smooth metered turns; full power turns, counterrotation, and infinitely variable track speeds provide unlimited maneuverability and

optimal control; hydrostatic steering system eliminates steering clutches and brakes

Brakes

hydrostatic (dynamic) braking stops machine when the direction/steering control lever is moved to neutral, the decelerator is depressed to the end of travel, or the brake pedal is depressed

Automatic Parking Brake

this safety feature engages wet, multiple-disk brakes automatically whenever the engine stops, the operator applies the brake pedal, or the neutral start lever lock is in stop position; machine cannot be

operated with brake applied

Hydraulic System

System type ....................................................................................open center
Pressure, system relief ....................................................................2,250 psi (15 514 kPa)
Pump type.......................................................................................gear
Flow ................................................................................................44 gpm (166 L/min.) @ 2,100 rpm
Filter, return oil ................................................................................10 micron
Control ............................................................................................standard – T-bar, two function / with All-Hydraulic (PAT) dozer blade – T-bar, three function
Cylinders .........................................................................................heat-treated, chrome-plated, polished cylinder rods with hardened steel (replaceable bushings) pivot pins
Cooling ............................................................................................oil-to-air heat exchanger

Capacities (U.S.)

850C LT

850C WT

850C WXLT

850C LGP

Fuel tank with lockable cap.............................................................92 gal. (348 L)

92 gal. (348 L)

Cooling system with recovery tank ..................................................9 gal. (34 L)

9 gal. (34 L)

Engine oil with spin-on filter ............................................................34 qt. (32.2 L)

34 qt. (32.2 L)

Final drive (each)

1st reduction ............................................................................3.25 gal. (12.3 L) Semi-U /

4.35 gal. (16.5 L) Semi-U /

10.0 gal. (37.9 L) PAT

10.0 gal. (37.9 L) Semi-U /

4.35 gal. (16.5 L) PAT

10.0 gal. (37.9 L) PAT

2nd reduction...........................................................................3.25 gal. (12.3 L)

3.25 gal. (12.3 L)

Hydraulic system reservoir ..............................................................21 gal. (79.5 L)

21 gal. (79.5 L)

21 gal. (80 L)

Hydrostatic transmission reservoir...................................................27 gal. (102.2 L)

27 gal. (102.2 L)

27 gal. (103 L)

Undercarriage

seven-roller track frame with front and rear track guides and sprocket guard; John Deere Dura-Trax™ features deep-heat-treated, sealed, and lubricated track links and through-hardened, sealed, and

lubricated rollers for maximum wear resistance; sprockets are segmented; extreme-duty shoes are available (on some models) for severe applications

Chain...............................................................................................sealed and lubed

sealed and lubed

Grouser width..................................................................................24 in. (610 mm)

30 in. (762 mm)

38 in. (965 mm) base /
34 in. (865 mm) PAT

Shoes, each side .............................................................................40

Ground contact area ........................................................................5,184 sq. in. (33 445 cm

)

6,480 sq. in. (41 806 cm

)

7,260 sq. in. (46 838 cm

)

9,196 sq. in. (59 329 cm

)

base / 8,228 sq. in. (53 084
cm

) PAT

Ground pressure..............................................................................7.8 psi (53.8 kPa) Semi-U /

6.3 psi (43.4 kPa) Semi-U /

6.1 psi (42.0 kPa) PAT

4.6 psi (31.7 kPa) Semi-U /

8.2 psi (56.5 kPa) PAT

6.7 psi (46.2 kPa) PAT

5.4 psi (37.2 kPa) PAT

Ground clearance, minimum

With single-bar grouser (excluding grouser height)...................16.0 in. (406 mm)

16.0 in. (406 mm)

With swamp shoe (including grouser height)...................................................................................................................................................................................................19.0 in. (483 mm) base

Length of track on ground ...............................................................108 in. (2743 mm)

108 in. (2743 mm)

121 in. (3073 mm)

Track gauge, standard .....................................................................74 in. (1880 mm) Semi-U /

80 in. (2032 mm) Semi-U /

88 in. (2235 mm) PAT

88 in. (2235 mm) Semi-U /

82 in. (2083 mm) PAT

88 in. (2235 mm) PAT

92 in. (2337 mm) PAT

Oscillation at front roller ..................................................................6 degrees, or 9.1 in. (231

6 degrees, or 9.0 in. (229

6 degrees, or 10.4 in. (264

7 degrees, or 12.5 in. (318

mm) Semi-U / 6 degrees,

mm) Semi-U / 7 degrees,

mm) PAT

mm) Semi-U / 7 degrees,

or 9.7 in. (246 mm) PAT

or 10.8 in. (274 mm) PAT

or 12.8 in. (325 mm) PAT

Track rollers each side.....................................................................7

Track pitch ...................................................................................8 in. (203 mm)

8 in. (203 mm)

S P E C I F I C A T I O N S

C S E R I E S I I

C O N S T R U C T I O N E Q U I P M E N T

This manual is related to the following products:

850C WXLT 850C LT 850C 850C LGP