John Deere Motor Grader 772A Users Manual

MOTOR GRADER 772A 772A

772A to the manual 06fcac3e-b799-47d6-80da-55ac43e70a15

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772A MOTOR GRADER

Model shown may include options

ENGINE PERFORMANCE
Nm Ilb-ft
w 651
::J
597
0
I- 542
I!!;!466

460
TORQUE

~

440
400
360
160 119 a:
w
140 104 ~
0
120 69 "IW
100
75 z

Ibl
g/kWhI hph

1

.45
.40
.35

ADD VERSATILITY WITH:

150 SAE net hp (112 kW)

Scarifier

12-ft. (3.65 m) moldboard with 0.62 x 6 in. (16 x
152 mm) through-hardened Dura-MaX@cutting
edge; 13- and 14-ft. (3.95 and 4.25 m)
moldboards and 2-ft. (610 mm) extensions
available

Rear-mounted ripper
Snow plow and wings
Bulldozer

hp I kW
POWER

-' 274
~
243
LL 213

FEATURES

60
FUEL CONSUMPTION

1000

1400

1600

2200

60

Power Shift transmission;
8 speeds forward, 4 reverse
Articulated

frame steering

Differential

lock-unlock

Automatic blade control

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
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
69

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.)

Rated Power @2300 rpm:

Net

Gross..

SAE
150hp(112kW)

DIN 70 020
112kW

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

Net engine power is with standard equipment including air cleaner, exhaust system, alternator, and cooling fan, at standard conditions per SAEJ1349 and DIN 70020, using No. 2D fuel @35 API gravity. No derating is required up to 10,000 ft. (3050 m) altitude. Gross
power is without coolingfan.

Engine: John Deere 6-466A
Type. . . . . . . . . 4-stroke cycle, turbocharged and intercooled diesel
Bore and stroke.
. . . . . . . . . . . . . . .4.56 x 4.75 in. (116 x 121 mm)
No.ofcylinders
6
Displacement
466cu.in.(7.638L)
Compression ratio
14.9t01
Maximum net torque @1300 rpm . . . . . 4651b-ft (630 Nm) (64 kg-m)
Lubrication. . . . . . . . . . . . . . . . . . . Pressure system w/full-flow filter

Coolingfan
Suctiontype
Aspiratedair cleanerw/restrictionindicator. . . . . . . . . . . . . . . . Dry
Electrical system. . . . . . . . . . . . . . . . . . 24 volt w/42 amp alternator
Batteries (two 12-volt)
Reserve capacity: 360 minutes

Shoulder reach outside wheels (frame straight):
Right
Left
Pitch at ground line
Blade Lift Mechanism:
Control
Lift Arms: Nodular cast iron
Positions
Control

88.4in.(2.25m)
89.6in.(2.28m)
44deg.forward
10 deg. back
Dual-lever,hydraulic

7
Hydraulic,footoperated

Circle:
Fabricated steel angle construction
Circle diameter
60in.(1.5m)
Rotation
360deg.
Drive. . . . . . . . . . . . . . . Hydraulic motor and worm gear w/positive
position lock
Sideshift,right
32.0in.(813mm)
left
33.5in.(851mm)

Transmission.
. . . . . . . . . . . . . . . . . . . Direct drive, full power shift
with planetary gear reductions. Foot inching pedal.

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

Travel Speeds (2200 engine rpm, no tire slip, 14.00-24tires):
Shift Lever Position
Forward
Reverse
mph
km/h
mph
km/h
1
2.3
3.7
3.0
4.8
2
3.3
5.3
4.2
6.8
3
5.2
8.9
6.6
10.6
4
6.7
10.8
8.6
13.9
5
8.8
14.2
6
11.5
18.5
7
14.6
23.6
8
25.1
40.4

Frame:
Rear mainframe.

Differential Lock. . . . . . . . . . Foot-operated, hydraulically actuated
Rear Drive. . . . . . . . . . . . . . . . . . . .. Inboard planetary final drives
with heat-treated, splined steel torque shafts. Oscillating welded construction tandems; nodular cast sprockets driving 2 in. (51 mm) pitch
roller chain in oil bath.
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 freewheels at transport speeds or when not in use.
Standard system - effective in gears 1-4 . . 5.03 in3 (89 cm3) pump,
2.03 in3 (33 cm3) motors
High speed system - effective in gears 1-6 6.00 in3 (98 cm3) pump,
2.03 in3 (33 cm3) motors

Front Axle: Fabricated steel box frame with planetary drives
Totaloscillation
30deg.
Wheel lean (either direction)
...20deg.
Steering:
Front.

. . . . . . . . . . . . . . . . . . Full hydraulic power system. Steering
capabilities without engine power
Rear. . . . . . . . . . . . . . . . .. Hydraulically articulated frame steering
(25 deg. left or right)
Minimumturningradius
22ft.6in.(6.86m)
Brakes:
Service
Parking.

Foot-operated,hydraulically
actuated, wet-disk, effective on 4 tandem wheels
. . . . . . . . . . . . . . . . . Foot-operated, mechanical, dry-disk,
effective on 4 tandem wheels

Hydraulic

System:

Closed center w/pressure controlled 4.0 cu. in. (65 cm3) variable-displacement pump. . . . . . . . . . 36 gpm (2.27 Us) @2200 engine rpm
Moldboard.

Length
Height
Thickness

. . . . . . . . . . . . . . . . . Wear-resistanthigh-carbon steel
12ft.(3.66m)
24in.(610mm)
0.88in.(22mm)

Cutting Edge: Dura-MaX@through-hardened curved steel
Thickness and width. . . . . . . . . . . . . . . .0.62 x 6 in. (16 x 152 mm)
Blade Range:
Liftaboveground
.17 in. (432 mm)
Blade side shift:
Right or left
26.9in.(683mm)
70

wall wlball and socket draft connection

. . . . . . . . . . . . . . . . . . . Welded box section from
articulation joint to mainframe arch
Width, minimum
12.03in.(306mm)
Height,minimum
11.95in.(304mm)
Thickness, sides
0.47in.(12mm)
top and bottom (min.)
0.87 in. (22 mm)
Weight per ft., minimum
120Ib.(179kg/m)
Minimum vertical section modulus.

. ... ... .... .. ... ...

143

in3

(2343 cm3)
Front mainframe. . . . . . . . . . . . . . . . . . . . Welded box section from
mainframe arch to front hood
Width
10in.(254mm)
Height, minimum
13in.(330mm)
Thickness, minimum ...
...
...0.63in.(16mm)
Weightperft., minimum
.110Ib.(164kg/m)
Minimum vertical section modulus
118in3
(1935 cm3)

Tires:
13.00-24, 12-PR, G2, standard
14.00-24, 12-PR, G2
17.5-25, 12-PR, L2

Dimensions:
Wheel
Tire
Size
Front
13.00-24 76.15 in.
8"rim
(1.93m)
(203 mm)
14.00-24 76.15 in.
10" rim (1.93m)
(254 mm)
17.5-25
78.40 in.
14" rim (1.99m)
(356 mm)

Tread
Rear
79.61 in.
(2.02m)

Width
Front
Rear
7ft. 9.5 in.
7ft. 10 in.
(2.37m)
(2.34m)

Ground Clearance
(Front Axle)
22 in.
(559 mm)

79.61 in.
(2.02m)

7ft. 11.5 in.
(2.43m)

8ft.
(2.44 m)

22.5 in.
(572 mm)

82.37 in.
(2.09 m)

8 It. 5 in.
(2.57m)

8ft. 6 in.
(2.59 m)

23.2 in.
(589 mm)

Height to top of steering wheel. . . . . . . . . . . . . . . 7 ft. 6 in. (2.29 m)
Capacities:
Fueltank
Cooling system
Engine lubrication,
includingfilter
Transmission and
hydraulicsystem
Tandem housings (each)
Worm gearbox

U.S.
70gal.
7gal.
20qt.
41gal.
5 gal.
4qt.

Liters
265.0
26.5
18.9
155.2
18.9
3.8

Scarifier (Special Equipment):
V-type for 4 ft. (1.22 m) cut with 3 manual pitch positions
Number of teeth
5standard,90ptional
Lift above ground
24.0in.(610mm)
Penetration
13.7in.(348mm)
Shank size
1x3in.(25x76mm)

Ripper (Special Equipment): 8 ft. (2.44 m) cut width, parallelogram
linkage, 2 manual shank vertical positions
Numberofshankpockets
5
Number of shanks
3
Liftaboveground
14.5in.(368mm)
Penetration
14in.(356mm)
Shank size
2x5in.(51x127mm)
Lift above ground (shank in upper position)
23.5 in. (597 mm)

J

772A MOTOR GRADER SPECIFICATIONS
Additional Standard Equipment:
Gauges:
Air filter indicator
Engine oil pressure
Front-wheel-drivereturn filter
indicator
Front-wheel-drivecharge
pressure
Fuel level
Hydraulic function return filter
indicator
Transmission clutch pressure
Transmission filter indicator
Transmission lube pressure
Transmissiontemperature
Water temperature

SAE Operating Weight
Standardequipment. . . .

Horn
Hourmeter
Lights, stop and tail
Lights, driving
Precleaner
Reverse warning alarm
ROPS cab w/seat belt, front wiper
and dome light
Seat, cushioned vinyl
Turn signals

Standard equipment

andscarifier.. .. .. .. .

Standard equipment,
scarifier and ripper. . . .

On Front
Wheels
9237 lb.
(4190 kg)
10,548 lb.
(4784 kg)
9780 lb.
(4436 kg)

On Rear
Wheels
Total
21,666 lb.
30,903 lb.
(9827 kg) (14017 kg)
21,470 lb.
32,018 lb.
(9739 kg) (14523 kg)
24,712 lb.
34,492 lb.
(11 209 kg) (15645 kg)

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
Air conditioner w/heavy-duty
alternator
Automatic blade control
Articulation indicator
Batteries, heavy-duty
w/620-minute reserve capacity
Blade, front bulldozer
w/float control
Bottom guard, heavy-duty
w/rear hitch
Bottom guard, regular
Cold-weather starting aid
Dura-Max through-hardened
cutting edge, 3/4x 8 in. (19 x 203 mm)
Engine disconnect, cold weather
Engine side shields
Fan, defroster
Front wheel drive in 1st through 6th gears,
11.5 mph (19 km/h),
free wheeling in 7th and 8th
gears, 6 cu in. (98 cm3)
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
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
140ft. (4.27 m) Wf3/4x 8 in.
(19 x 203 mm) through-hardened
Dura-Max cutting edge

7

kg
3

187
350
6

85
159
3

101

46

1618

734

459
160
3

208
73
1

8.5 Ib/ft (13 kg/m)
14
30
60
27
4
2

34
16
31
31
1

15
7
14
14
0.5

17

8

50
4
12
9
6

23
2
5
4
3

12
6
12

5
3
5

106

48

60

27

116

53

146

66

155

70

Moldboard extensions, 2-ft. (610 mm),
right or left (less cutting edge)
Moldboard float
Overlay end bits (1 pair), 6 in. (152 mm)
Overlay end bits (1 pair), 8 in. (203 mm)
Rear hitch
Rims:
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
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

lb.

kg

220
14
62
77
61

100
6
28
35
28

452
645
2474

205
293
1123

-447

-203

1115
9
3

506
4
1

111

50

58

26

542

246

295

134

210
468
11
4
4

95
213
5
2
2

71

II

II

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)

72



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