S P E C I F I C A T I O N S
C
S E R I E S I I
850C
C O N S T R U C T I O N E Q U I P M E N T
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)
Cooling system with recovery tank ..................................................9 gal. (34 L)
Engine oil with spin-on filter............................................................34 qt. (32.2 L)
Final drive (each)
92 gal. (348 L)
9 gal. (34 L)
34 qt. (32.2 L)
92 gal. (348 L)
9 gal. (34 L)
34 qt. (32.2 L)
92 gal. (348 L)
9 gal. (34 L)
34 qt. (32.2 L)
1st reduction............................................................................3.25 gal. (12.3 L) Semi-U /
4.35 gal. (16.5 L) PAT
2nd reduction...........................................................................3.25 gal. (12.3 L)
Hydraulic system reservoir ..............................................................21 gal. (79.5 L)
Hydrostatic transmission reservoir...................................................27 gal. (102.2 L)
4.35 gal. (16.5 L) Semi-U /
10.0 gal. (37.9 L) PAT
3.25 gal. (12.3 L)
21 gal. (79.5 L)
27 gal. (102.2 L)
10.0 gal. (37.9 L) PAT
10.0 gal. (37.9 L) Semi-U /
10.0 gal. (37.9 L) PAT
3.25 gal. (12.3 L)
21 gal. (80 L)
3.25 gal. (12.3 L)
21 gal. (79.5 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
Grouser width..................................................................................24 in. (610 mm)
sealed and lubed
30 in. (762 mm)
sealed and lubed
30 in. (762 mm)
sealed and lubed
38 in. (965 mm) base /
34 in. (865 mm) PAT
43
9,196 sq. in. (59 329 cm2)
base / 8,228 sq. in. (53 084
cm2) PAT
Shoes, each side .............................................................................40
Ground contact area........................................................................5,184 sq. in. (33 445 cm2)
40
43
6,480 sq. in. (41 806 cm2)
7,260 sq. in. (46 838 cm2)
Ground pressure..............................................................................7.8 psi (53.8 kPa) Semi-U /
8.2 psi (56.5 kPa) PAT
6.3 psi (43.4 kPa) Semi-U /
6.7 psi (46.2 kPa) PAT
6.1 psi (42.0 kPa) PAT
4.6 psi (31.7 kPa) Semi-U /
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)
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)
Track gauge, standard.....................................................................74 in. (1880 mm) Semi-U /
82 in. (2083 mm) PAT
Oscillation at front roller ..................................................................6 degrees, or 9.1 in. (231
mm) Semi-U / 6 degrees,
or 9.7 in. (246 mm) PAT
Track rollers each side.....................................................................7
Track pitch ...................................................................................8 in. (203 mm)
108 in. (2743 mm)
80 in. (2032 mm) Semi-U /
88 in. (2235 mm) PAT
6 degrees, or 9.0 in. (229
mm) Semi-U / 7 degrees,
or 10.8 in. (274 mm) PAT
7
121 in. (3073 mm)
88 in. (2235 mm) PAT
121 in. (3073 mm)
88 in. (2235 mm) Semi-U /
92 in. (2337 mm) PAT
7 degrees, or 12.5 in. (318
mm) Semi-U / 7 degrees,
or 12.8 in. (325 mm) PAT
7
6 degrees, or 10.4 in. (264
mm) PAT
7
8 in. (203 mm)
8 in. (203 mm)
8 in. (203 mm)
16
Dimensions
A
Overall height to roof
Overall height
to exhaust stack
B
Tread depth with single-bar grousers
Tread depth with
swamp shoes
C
Ground clearance
with grousers
Moderate duty
2.6 in. (65 mm)
2.6 in. (65 mm)
2.6 in. (65 mm)
2.6 in. (65 mm)
Extreme duty
2.8 in. (72 mm)
850C LT ..........................124.0 in. (3151 mm)
850C WT.........................124.0 in. (3151 mm)
850C WXLT .....................124.0 in. (3151 mm)
850C LGP........................124.0 in. (3151 mm)
124.8 in. (3170 mm)
124.8 in. (3170 mm)
124.8 in. (3170 mm)
124.8 in. (3170 mm)
16 in. (406 mm)
16 in. (406 mm)
16 in. (406 mm)
16 in. (406 mm)
3.7 in. (93 mm)
D
Blade width
E
Blade height
F
Blade lift height
G
Blade dig-
ging depth
H
Blade tilt
(uses tilt jack)
I
Overall
length
with blade
J
Overall width
with blade
angled
850C LT
All-Hydraulic
(PAT) Dozer ..............146.0 in.
(3708 mm)
48.3 in.
(1227 mm)
38.0 in.
(962 mm)
33.4 in.
(849 mm)
19.0 in.
(482 mm)
203.1 in.
(5160 mm)**
131.6 in.
(3343 mm)
Semi-U (High
Production) ..............128.3 in.
(3259 mm)
56.5 in.
(1435 mm)
43.3 in.
(1100 mm)
20.2 in.
(513 mm)
28.7 in.
(730 mm)
207.1 in.
(5262 mm)*
N/A
*Optional extended drawbar adds 10.1 in. (253 mm).
**Optional extended drawbar adds 8.9 in. (223 mm).
850C WT
All-Hydraulic
Dozer (PAT) ..............158.0 in.
(4013 mm)
48.3 in.
(1227 mm)
38.0 in.
(962 mm)
33.4 in.
(849 mm)
20.5 in.
(522 mm)
203.1 in.
(5160 mm)**
142.4 in.
(3618 mm)
Semi-U (High
Production) ..............140.0 in.
(3556 mm)
56.5 in.
(1435 mm)
43.3 in.
(1100 mm)
20.2 in.
(513 mm)
34.6 in.
(878 mm)
207.1 in.
(5262 mm)***
N/A
**Optional extended drawbar adds 8.9 in. (223 mm).
***Optional extended drawbar adds 7 in. (176 mm).
850C WXLT
All-Hydraulic
Dozer (PAT) ..............158.0 in.
(4013 mm)
48.3 in.
(1227 mm)
40.7 in.
(1034 mm)
35.2 in.
(893 mm)
20.5 in.
(522 mm)
218.5 in.
(5553 mm)**
142.4 in.
(3618 mm)
**Optional extended drawbar adds 8.9 in. (223 mm).
850C LGP
Semi-U (Low Profile) and Straight blades available through Custom Engineering.
All-Hydraulic
(PAT) Dozer ..............168.0 in.
(4267 mm)
48.3 in.
(1227 mm)
40.7 in.
(1034 mm)
35.2 in.
(893 mm)
21.8 in.
(554 mm)
218.5 in.
(5553 mm)**
152.0 in.
(3860 mm) /
144 in.
#
(3658 mm)
Semi-U (High
Production) ..............156.6 in.
(3978 mm)
43.8 in.
(1113 mm)
42.5 in.
(1080 mm)
16.9 in.
(429 mm)
37.0 in.
(940 mm)
222.5 in.
(5651 mm)**
N/A
**Optional extended drawbar adds 8.9 in. (223 mm).
#
With L/R angle cylinder pins removed at blade.
K
Blade angle
L
Cut reach
M
Width over track
106 in. (2692 m)
N
Cast reach
O
Cutting edge angle
60 degrees
850C LT
All-Hydraulic
(PAT) Dozer ..............25 degrees
4.5 in. (113 m)
21.2 in. (538 m)
20.5 in. (523 m)
20.5 in. (523 m)
21.2 in. (538 mm)
850C WT
All-Hydraulic
(PAT) Dozer ..............25 degrees
3.9 in. (98 m)
3.9 in. (98 m)
118 in. (2997 m)
118 in. (2997 m)
126 in. (3200 mm)
60 degrees
60 degrees
60 degrees
850C WXLT
All-Hydraulic
(PAT) Dozer ..............25 degrees
850C LGP
All-Hydraulic
(PAT) Dozer ..............25 degrees
4.5 in. (113 mm)
Drawbar Pull
850C
Maximum ........................................................................................72,000 lb. (320 kN)
At 1.2 mph (1.9 km/h).....................................................................35,200 lb. (156 kN)
At 2.0 mph (3.2 km/h).....................................................................25,300 lb. (112 kN)
18
A
E
F
C
G
Standard Drawbar
B
Extended Drawbar
I
O
K
L
Cut Reach
Width Over Track
M
J
H
N
Cast Reach
D
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
320
32
28
24
20
16
12
8
850C LT, WT,
WXLT, and LGP
280
240
200
160
120
80
CRAWLER SPEED
VS
GROUND PULL
Usable pull will depend
on traction and weight of tractor.
40
N
4
lb.
kg
km/h
0
0
2
4
6
8
10
12
mph
1
2
3
4
5
6
7
8
SPEED
19
850C Series II Dozer
Key: G Standard equipment L Optional or special equipment
See your John Deere dealer for further information.
LT WT WXLT LGP
Engine
LT WT WXLT LGP Undercarriage (continued)
LT WT WXLT LGP Operator’s Station (continued)
G G G G Air cleaner, dual-stage aspirated type
G G G G Air cleaner restriction indicator
G G G G Blower fan
G G G G Coolant recovery tank
G G G G Electric ether start aid
G G G G Enclosed safety fan guard (conforms
to SAE J1308)
G G G G Engine coolant –34°F (–37°C)
G G G G Oil-to-water engine oil cooler
G G G G Precleaner
L L
L L
G L
22-in. (560 mm) moderate-duty single-
bar grouser tracks, Dura-Trax™ lub-
ricated chain with split master link
22-in. (560 mm) extreme-duty single-
bar grouser tracks, Dura-Trax lubri-
cated chain with split master link
24-in. (610 mm) moderate-duty single-
bar grouser tracks, Dura-Trax lubri-
cated chain with split master link
(for 850C LT)
G G G G Fuel gauge, electric, illuminated
G G G G Ground-speed decelerator (engine
and transmission)
G G G G Headliner for ROPS/FOPS
G G G G Horn, electric (conforms to SAE
J994, J1446)
G G G G Hourmeter, electric, illuminated
(selectable)
G G G G Interior-mounted rearview mirror
(conforms to SAE J985)
G G G G Spin-on fuel filter
G G G G Trash-resistant radiator
G G G G Turbocharger
G G G G Underhood muffler with vertical
exhaust stack
G G G G Water separator
L L L L Engine coolant heater, 1,000 watts,
120 volts
L L
24-in. (610 mm) extreme-duty single-
bar grouser tracks, Dura-Trax lubri-
cated chain with split master link
(N/A for 850C PAT blade)
G G G G Key start switch with electric fuel
shutoff
G G G G Lunch-box storage
G G G G Modular design ROPS/FOPS canopy
(conforms to SAE J1040)
G G G G Parking brake, single-lever activation
L L L L Protection package, full vehicle –
Brush screens, heavy-duty / Guards,
tank protection / Limb risers, arched
G G G G Reverse ratio – user selectable at
80%, 100%, 115%, or 130% of for-
ward speed
G G G G Seat belt, 3 in. (76 mm), with retrac-
tors (conforms to SAE J386)
G G G G Single-lever steering, direction, and
ground-speed control with selectable
ground-speed and horn controls inte-
grated in “T” handle
G G
30-in. (760 mm) moderate-duty single-
bar grouser tracks, Dura-Trax lubri-
cated chain with split master link
G 34-in. (865 mm) moderate-duty single-
bar grouser tracks, Dura-Trax lubri-
cated chain with split master link
(with PAT blade)
G 38-in. (965 mm) moderate-duty single-
bar grouser tracks, Dura-Trax lubri-
cated chain with split master link
(for 850C LGP Semi-U blade)
L L L L Prescreener guard
L L L L Radiator sand screen
L L L L Reversible fan
L L L L Chrome exhaust stack
Power Train
G G G G Automatic applied, hydrostatic-
released park brake, pedal operated
G G G G Oil-to-air transmission cooler
G G G G Dual-path hydrostatic transmission
G G G G Guard, built-in final drive seal
G G G G Transmission neutral lock with
starter safety switch
G G G G Transmission diagnostic test ports
L L L L Remote transmission diagnostic test
ports
L 36.5-in. (928 mm) swamp shoe tracks,
Dura-Trax lubricated chain with split
master link (N/A with PAT blade)
Bolt-on full-length rock guards
L L
G G G G Tool storage, lockable
G G G G Voltmeter digital display (selectable)
Lights
Overall Vehicle
G G G G Front tow hook
L L L L Two front driving/working and one
rear working halogen, 33,000 candle-
power (375 737 lux each)
G G G G Heavy-duty, hinged, bar-type grille
G G G G Perforated engine side shields
G G G G Rear service doors, lockable
G G G G Reverse alarm – Switchable to 97
dB(A) or 111 dB(A) (conforms to SAE
J994, J1446)
G G G G Vandal protection – Engine access
door / Fuel tank cap / Rear service
doors / Instrument panel
L L L L Winch drive
Operator’s Station
Electrical
G G G G Batteries, two, 160-min. reserve
capacity, 950 CCA
G G G G Bypass start safety cover at starter
G G G G Master electrical disconnect switch,
lockable
G G G G Built-in diagnostics – Fault code
retrieval / Onboard diagnostics for
monitors, controller(s), wiring, gauges,
sensors, etc.
G G G G Built-in Operator’s Manual storage
compartment and manual
L L L L Cab – Air conditioning, 33,000 Btu* /
Fresh air intake heater/pressurizer,
400 CFM, 40,000 Btu/hr. (11.7 kW)
(conforms to SAE J1503, J1535D) /
Front window and two door wind-
shield wipers/washers
G G G G Deluxe suspension vinyl seat –
Adjustable armrests, thigh support,
backrest, height/weight, and fore-aft
(conforms to SAE J899)
Hydraulic System
G G G G Oil-to-air hydraulic cooler
G G G G Lift cylinders
G G G G “O” ring face seal fittings
G G G G Quick-drop hydraulic valve (Semi-U
blade) (optional with All-Hydraulic
[PAT] dozer blade)
L L L L All-Hydraulic (PAT) dozer blade with
grille “up-loop” plumbing
G G G G Two-spool hydraulic system
G G G G Three-spool hydraulic system (stan-
dard with PAT blade)
L L L L Four-spool hydraulic system (with
PAT blade)
L L
L Cupped end bits (except All-Hydraulic
[PAT] dozer blades*)
L L L L Straight end bits
G G G G All-Hydraulic (PAT) dozer blade
(included in SAE operating weight)
G G
G Semi-U (High Production) dozer
blade (included in SAE operating
weight)
G G G G Tilt cylinder hose protection
Blade trash rack
L
G G G G Deluxe suspension cloth seat
G G G G Deluxe air suspension vinyl and
cloth seat
L L L L Environmental fluid drains
L L L L Extended rigid drawbar with pin for
pull-type implements (for 850C LT
included in SAE operating weight)
G L L L Heavy-duty transverse case cover
(standard for WT with PAT blade)
L L L L Perforated hood for trash envi-
ronments
L L L L Rigid drawbar with pin (standard for
LT and WT with PAT blade) (for 850C
WT, 850C LGP included in SAE oper-
ating weight)
G G G G Electronic monitor system with audi-
ble and visual warning – Air restric-
tion / Coolant temperature / Engine
oil pressure / Ether injection on /
Fasten seat belt / Hydraulic filter
restriction / Low alternator voltage /
Transmission filter restriction / Trans-
mission malfunction /Transmission
return to neutral / Transmission tem-
perature
L L L L Auxiliary hydraulic lines to rear
L L L L Oil sampling test kit
Undercarriage
G G Chain guides
G G G G Front idler and bolt-on sprocket
chain guides
G G G G Sealed and lubricated chain
G G G G Oscillating track-frame system
G G G G Pinned front track-frame crossbar
system
L L L
L L
Trash bars front and rear
L Grille housing mounted counter-
weight (N/A with PAT blade)
G G G G Engine rpm digital display (selectable)
G G G G Floormat
Net engine power is with standard equipment including air cleaner, exhaust
Specifications and design subject to change without notice. Wherever applicable, specifications
are in accordance with SAE standards. Except where otherwise noted, these specifications are
based on units with rollover protective structures, full fuel tanks, 175-lb. (79 kg) operators, and
standard equipment.
system, alternator, and cooling fan, at standard conditions per SAE J1349 and
DIN 6270B, using No. 2-D fuel at 35 API gravity. No derating is required up to
10,000-ft. (3050 m) altitude. Gross power is without cooling fan.
Also available: winches, fair-leads, log arches, skidding grapples, trash pack-
ages, landfill protection packages, cable plows, side booms, field-installed cab
for ROPS, ROPS heater, and fire suppression systems.
DKA850CII Litho in U.S.A. (03-05)
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