John Deere Automobile 772A User Manual

772A MOTOR GRADER

Model shown may include options

FEATURES

ADD VERSATILITY WITH:

ENGINE PERFORMANCE

Scarifier

150 SAE net hp (112 kW)

Nm Ilb-ft

12-ft. (3.65 m) moldboard with 0.62 x 6 in. (16 x

Rear-mounted ripper

152 mm) through-hardened Dura-MaX@cutting

651 460

::J

TORQUE

Snow plow and wings

Bulldozer

edge; 13- and 14-ft. (3.95 and 4.25 m)

moldboards and 2-ft. (610 mm) extensions

available

597 440

I- 542 400

I-

hp I kW

!!;!466 360

Automatic blade control

Power Shift transmission;

8 speeds forward, 4 reverse

160 119 a:

POWER

140 104

Articulated

frame steering

120 69 "-

I-

100

Differential lock-unlock

Ibl

^g/kWhI hph

All-wheel drive, standard system to 6.7 mph

(10.8 km/h), optional system to 11.5 mph

(18.5 km/h), switch-controlled for two modes of

operation

FUEL CONSUMPTION

-' 274 .45

~ 243 .40

LL 213

.35

1400

1600

2200

1000

22-ft. 6 in. (6.86 m) turning radius

ENGINE SPEED-RPM

All-hydraulic control of blade and machine

functions

Closed-center hydraulic system with

operational no-leak, drift-free poppet valves

Pushbutton control

Hydraulically controlled, 7-position lift arms let

you position blade for 90-degree bank cuts, left

or right, in approximately one minute, without

leaving the seat

Oscillating front axle and rear tandem

Hydraulic front-wheel lean

Rollover protective structure (ROPS) w/cab

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772A MOTORGRADER SPECIFICATIONS

(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 a unit with 13.00-24, 12-PR, tubeless tires on 8 in. (254 mm) rims, 12-ft. (3.65 m) moldboard with 6-in. (152 mm) cutting edge, and standard equipment. Weights include

lubricants, coolants, full fuel tank and 175 lb. (79 kg) operator.)

DIN 70 020

112kW

Rated Power @2300 rpm:

SAE

Shoulder reach outside wheels (frame straight):

Right

Left

Net

150hp(112kW)

88.4in.(2.25m)

89.6in.(2.28m)

Gross.. .. .. .. .. .. .. .. .. .. . 160 hp (119 kW)

Pitch at ground line

44deg.forward

Net engine power is with standard equipment including air cleaner, exhaust system, alter-

nator, and cooling fan, at standard conditions per SAEJ1349 and DIN 70020, using No. 2-

D fuel @35 API gravity. No derating is required up to 10,000 ft. (3050 m) altitude. Gross

power is without coolingfan.

10 deg. back

Blade Lift Mechanism:

Control

LiftArms: Nodular cast iron

Positions

Dual-lever,hydraulic

Engine: John Deere 6-466A

Type. . . . . . . . . 4-stroke cycle, turbocharged and intercooled diesel

Bore and stroke.

No.ofcylinders

Displacement

. . . . . . . . . . . . . . .4.56 x 4.75 in. (116 x 121 mm)

Control

Hydraulic,footoperated

466cu.in.(7.638L)

14.9t01

Circle:

Fabricated steel angle construction

Compression ratio

Maximum net torque @1300 rpm . . . . . 4651b-ft (630 Nm) (64 kg-m)

Lubrication. . . . . . . . . . . . . . . . . . . Pressure system w/full-flow filter

Circle diameter

Rotation

60in.(1.5m)

360deg.

Drive. . . . . . . . . . . . . . . Hydraulic motor and worm gear w/positive

position lock

Coolingfan

Suctiontype

Aspiratedaircleanerw/restrictionindicator. . . . . . . . . . . . . . . . Dry

Sideshift,right

left

32.0in.(813mm)

33.5in.(851mm)

Electricalsystem. . . . . . . . . . . . . . . . . . 24 volt w/42 amp alternator

Batteries (two 12-volt)

Reserve capacity: 360 minutes

Transmission.

with planetary gear reductions. Foot inching pedal.

. . . . . . . . . . . . . . . . . . . Direct drive, full power shift

Drawbar . . Welded box section, 3.5 x 7 x 0.5 in. (89 x 178 x 13 mm)

wall wlball and socket draft connection

Frame:

Travel Speeds (2200 engine rpm, no tire slip, 14.00-24tires):

Rear mainframe. . . . . . . . . . . . . . . . . . . . Welded box section from

articulation joint to mainframe arch

Shift Lever Position

Forward

Reverse

mph

km/h

mph

km/h

Width, minimum

Height,minimum

Thickness, sides

12.03in.(306mm)

11.95in.(304mm)

0.47in.(12mm)

2.3

3.3

3.7

3.0

4.2

6.6

8.6

4.8

5.3

8.9

6.8

5.2

10.6

13.9

top and bottom (min.)

Weight per ft., minimum

0.87 in. (22 mm)

6.7

10.8

14.2

18.5

23.6

40.4

120Ib.(179kg/m)

8.8

Minimum vertical section modulus.

. . . . . . . . . . . . . . . . . . . 143 in3

11.5

14.6

25.1

(2343 cm3)

Front mainframe. . . . . . . . . . . . . . . . . . . . Welded box section from

mainframe arch to front hood

Differential Lock. . . . . . . . . . Foot-operated, hydraulically actuated

Width

10in.(254mm)

Height, minimum

Thickness, minimum ...

Weightperft., minimum

13in.(330mm)

Rear Drive. . . . . . . . . . . . . . . . . . . .. Inboard planetary final drives

...

...0.63in.(16mm)

.110Ib.(164kg/m)

118in3

with heat-treated, splined steel torque shafts. Oscillating welded con-

struction tandems; nodular cast sprockets driving 2 in. (51 mm) pitch

roller chain in oil bath.

Minimum vertical section modulus

(1935 cm3)

Tires:

Front Drive.

. . . . . . . Standard and optional systems are available

to match different applications. Both use a variable-displacement

pump, a reversible motor in each wheel, and a flow divider to assure

front wheel traction. System has two operational modes and free-

wheels at transport speeds or when not in use.

13.00-24, 12-PR, G2, standard

14.00-24, 12-PR, G2

17.5-25, 12-PR, L2

Dimensions:

Standard system

effective in gears 1-4 . . 5.03 in3 (89 cm3) pump,

2.03 in3 (33 cm3) motors

Wheel Tread

Tire

Width

Ground Clearance

High speed system - effective in gears 1-6 6.00 in3 (98 cm3) pump,

Size

Front

Rear

Front

Rear

7ft. 10 in.

(2.34m)

(Front Axle)

22 in.

(559 mm)

2.03 in3 (33 cm3) motors

13.00-24 76.15 in. 79.61 in.

7ft. 9.5 in.

(2.37m)

8"rim

(1.93m)

(2.02m)

Front Axle: Fabricated steel box frame with planetary drives

(203 mm)

14.00-24

10" rim

Totaloscillation

Wheel lean (either direction)

30deg.

...20deg.

22.5 in.

76.15 in. 79.61 in. 7ft. 11.5 in.

8ft.

(1.93m)

(2.02m)

(2.43m)

(2.44 m)

(572 mm)

(254 mm)

Steering:

8 It. 5 in.

(2.57m)

8ft. 6 in.

(2.59 m)

23.2 in.

(589 mm)

17.5-25

78.40 in. 82.37 in.

(1.99m) (2.09 m)

14" rim

Front. . . . . . . . . . . . . . . . . . . Full hydraulic power system. Steering

capabilities without engine power

(356 mm)

Height to top of steering wheel. . . . . . . . . . . . . . . 7 ft. 6 in. (2.29 m)

Rear. . . . . . . . . . . . . . . . .. Hydraulically articulated frame steering

(25 deg. left or right)

Capacities:

Fueltank

U.S.

70gal.

7gal.

Liters

265.0

26.5

Minimumturningradius

22ft.6in.(6.86m)

Brakes:

Cooling system

Engine lubrication,

Service

Foot-operated,hydraulically

actuated, wet-disk, effective on 4 tandem wheels

18.9

includingfilter

20qt.

Transmission and

Parking. . . . . . . . . . . . . . . . . . Foot-operated, mechanical, dry-disk,

effective on 4 tandem wheels

155.2

18.9

3.8

hydraulicsystem

Tandem housings (each)

Worm gearbox

41gal.

5 gal.

4qt.

Hydraulic System:

Closed center w/pressure controlled 4.0 cu. in. (65 cm3) variable-dis-

placement pump. . . . . . . . . . 36 gpm (2.27 Us) @2200 engine rpm

Scarifier (Special Equipment):

V-type for 4 ft. (1.22 m) cut with 3 manual pitch positions

Number of teeth

Lift above ground

Penetration

5standard,90ptional

Moldboard.

Length

. . . . . . . . . . . . . . . . . Wear-resistanthigh-carbon steel

24.0in.(610mm)

12ft.(3.66m)

24in.(610mm)

0.88in.(22mm)

13.7in.(348mm)

1x3in.(25x76mm)

Height

Shank size

Thickness

Ripper (Special Equipment): 8 ft. (2.44 m) cut width, parallelogram

Cutting Edge: Dura-MaX@through-hardened curved steel

linkage, 2 manual shank vertical positions

Thickness and width. . . . . . . . . . . . . . . .0.62 x 6 in. (16 x 152 mm)

Numberofshankpockets

Number of shanks

Blade Range:

Liftaboveground

.17 in. (432 mm)

26.9in.(683mm)

Liftaboveground

14.5in.(368mm)

14in.(356mm)

Blade side shift:

Penetration

Right or left

Shank size

Lift above ground (shank in upper position)

2x5in.(51x127mm)

23.5 in. (597 mm)

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772A MOTOR GRADER SPECIFICATIONS

On Front

Wheels

9237 lb.

(4190 kg)

10,548 lb.

On Rear

Wheels

21,666 lb.

(9827 kg)

21,470 lb.

(9739 kg) (14523 kg)

24,712 lb. 34,492 lb.

Additional Standard Equipment:

Gauges:

Air filter indicator

Engine oil pressure

Front-wheel-drivereturn filter Lights, driving

indicator

Front-wheel-drivecharge

pressure

Fuel level

Total

SAEOperating Weight

Horn

Hourmeter

30,903lb.

(14017 kg)

32,018 lb.

Standardequipment. . . .

Lights, stop and tail

Standard equipment

andscarifier.. .. .. .. .

Standard equipment,

Precleaner

(4784 kg)

9780 lb.

Reverse warning alarm

ROPS cab w/seat belt, front wiper

and dome light

scarifier and ripper. . . . (4436 kg) (11 209 kg) (15645 kg)

Hydraulic function return filter Seat, cushioned vinyl

indicator

Turn signals

Transmissionclutch pressure

Transmissionfilter indicator

Transmissionlube pressure

Transmissiontemperature

Water temperature

Optional or Special Equipment with Weights:

(Add these weights to SAE Standard Equipment operating weights

to obtain total operating weights.)

lb.

Accelerato r-dece Ierato r

Moldboard extensions, 2-ft. (610 mm),

right or left (less cutting edge)

Moldboard float

220

100

Air conditioner w/heavy-duty

alternator

187

350

159

Automatic blade control

Articulation indicator

Overlay end bits (1 pair), 6 in. (152 mm)

Overlay end bits (1 pair), 8 in. (203 mm)

Rear hitch

Batteries, heavy-duty

w/620-minute reserve capacity

Blade, front bulldozer

w/float control

101

Rims:

452

645

2474

205

293

1123

10 in. (254 mm) for 14.00-24tires

14 in. (356 mm) for 17.50-25tires

Ripper, rear mounted with hitch

ROPS canopy w/seat belt and

instrument panel cover

Scarifier, regular w/five teeth

1 x 3 in. (25 x 76 mm)

Scarifier float

Seat belt, 3-in. (76 mm)

Seat, deluxe suspension, cloth

covered

Seat, deluxe suspension, vinyl

covered

1618

734

Bottom guard, heavy-duty

w/rear hitch

208

459

160

-447

-203

Bottom guard, regular

Cold-weather starting aid

1115

506

Dura-Max through-hardened

cutting edge, 3/4x 8 in. (19 x 203 mm)

Engine disconnect, cold weather

Engine side shields

8.5 Ib/ft (13 kg/m)

111

Fan, defroster

Front wheel drive in 1st through 6th gears,

11.5 mph (19 km/h),

free wheeling in 7th and 8th

Sound suppression package

(includes bottom guard)

Sound suppression package

(for use w/ripper)

Tires:

14.00-24, 12 PR, G2

17.5-25,12 PR, L2

Toolbox

Winter door cam for cab

Wiper, rear windshield

542

295

246

134

gears, 6 cu in. (98 cm3)

0.5

variable displacement pump

Heater, cab, 19,000 BTU (5.6 kW)

Heater, cab, 38,000 BTU (11.1 kW)

Heater, cab, 40,000 BTU (11.7 kW)

Heater coolant

210

468

213

Heater, roof-mounted, 25,000 BTU

(7.3 kW) (add to air conditioner)

Hydraulic pump, pressure controlled,

variable displacement, 6.0 cu. in.

(98 cm3), 52.4 gpm (3.3 Us)

Lights, blade

Lights, work, 2 fronU2 rear floods

Mat, floor

Mirror, outside rear view, convex, outside

Mirror, outside rear view, convex,

both sides

Mirror, outside rear view, flat, one side

Mirror, outside, rear view, flat, both sides

Moldboards:

12-ft. (3.66 m) Wf3/4x 8 in

(19 x 203 mm) through-hardened

Dura-Max cutting edge

130ft. (3.96 m) w/5/ax 6 in.

(16 x 152 mm) through-hardened

Dura-Max cutting edge

13-ft. (3.96 m) wf3/4x 8 in.

(19 x 203 mm) through-hardened

Dura-Max cutting edge

140ft. (4.27 m) wfS/ax 6 in.

(16 x 152 mm) through-hardened

Dura-Max cutting edge

106

116

146

155

140ft. (4.27 m) Wf3/4x 8 in.

(19 x 203 mm) through-hardened

Dura-Max cutting edge

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772A MOTOR GRADER DIMENSIONS

-r

10ft.6in.

(3.20m)

,ftT

(2.92m)

8 ft. 11 in.

(2.72m)

19 ft. 7 in. (5.97 m)

27 ft. 9.5 in. (8.47 m)

30 ft. 2 in. (9.20 m)

32 It. 6 in. (9.90 m)

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