John Deere MOTOR GRADER 772A SPECIFICATIONS
772A MOTOR GRADER
ENGINE PERFORMANCE
Nm Ilb-ft
w 651 460
::J
~597 440
0
I- 542 400
I-
!!;!466 360
g/kWh
I hph
-' 274
~ 243 .40
1
LL 213 .35
Ibl
FUEL CONSUMPTION
.45
1000
ENGINE SPEED-RPM
TORQUE
POWER
1400 1600 2200
hp I kW
160 119 a:
140 104 ~
120 69 "-
100 75 z
60 60
FEATURES
150 SAE net hp (112 kW)
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
Power Shift transmission;
w
0
I-
W
8 speeds forward, 4 reverse
Articulated frame steering
Differential lock-unlock
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
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
Model shown may include options
ADD VERSATILITY WITH:
Scarifier
Rear-mounted ripper
Snow plow and wings
Bulldozer
Automatic blade control
69
772A MOTORGRADERSPECIFICATIONS
(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 @2300rpm: SAE
Net
Gross.. .. .. .. .. .. .. .. .. .. . 160 hp (119 kW)
Net engine power iswith standard equipment including air cleaner, exhaust system, alter-
nator,andcooling fan, at standard conditions per SAEJ1349 and DIN 70020, usingNo. 2-
D fuel @35API gravity. No derating is required upto 10,000 ft. (3050 m) altitude. Gross
power is without coolingfan.
150hp(112kW)
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
Aspiratedaircleanerw/restrictionindicator. . . . .. .. . . . . . .. .Dry
Electricalsystem. . . . . . .. . . . . . .. . . .24 volt w/42 amp alternator
Batteries(two 12-volt) Reserve capacity: 360 minutes
Transmission. .. .. .. .. . . .. . . . . . . .Direct drive, full power shift
with planetary gear reductions. Foot inching pedal.
Travel Speeds (2200engine rpm, no tire slip, 14.00-24tires):
Shift Lever Position Forward Reverse
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
mph km/h mph km/h
5 8.8 14.2
6 11.5 18.5
7 14.6 23.6
8 25.1 40.4
Differential Lock. . . . . . . . .. Foot-operated, hydraulically actuated
Rear Drive. . . . . . . . . . . . . . . . . . . .. Inboard planetary final drives
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.
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.
Standard system - effective in gears 1-4 . . 5.03 in3 (89 cm3) pump,
High speed system - effective in gears 1-6 6.00 in3 (98 cm3) pump,
Front Axle: Fabricated steel box frame with planetary drives
Totaloscillation 30deg.
Wheel lean (either direction) ...20deg.
Steering:
Front. . . . . . . . . . . . . . . . . . . Full hydraulic power system. Steering
Rear. . . . . . . . . . . . . . . . .. Hydraulically articulated frame steering
Minimumturningradius 22ft.6in.(6.86m)
Brakes:
Service Foot-operated,hydraulically
Parking. . . . . . . . . . . . . . . . . . Foot-operated, mechanical, dry-disk,
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
Moldboard.
Length 12ft.(3.66m)
Height 24in.(610mm)
Thickness 0.88in.(22mm)
actuated, wet-disk, effective on 4 tandem wheels
. . . . . . . . . . . . . . . . . Wear-resistanthigh-carbon steel
2.03 in3 (33 cm3) motors
2.03 in3 (33 cm3) motors
capabilities without engine power
effective on 4 tandem wheels
Cutting Edge: Dura-MaX@through-hardenedcurved steel
Thicknessand width. . . . . . .. . . . . . .. .0.62 x 6 in. (16 x 152 mm)
Blade Range:
Liftaboveground
Bladeside shift:
Rightor left 26.9in.(683mm)
DIN 70 020
112kW
(25 deg. left or right)
.17 in. (432 mm)
Shoulder reach outside wheels (frame straight):
Right 88.4in.(2.25m)
Left 89.6in.(2.28m)
Pitch at ground line 44deg.forward
10deg. back
Blade Lift Mechanism:
Control Dual-lever,hydraulic
LiftArms: Nodular cast iron
Positions 7
Control 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)
Drawbar . . Welded box section, 3.5 x 7 x 0.5 in. (89 x 178 x 13 mm)
left 33.5in.(851mm)
wall wlball and socket draft connection
Frame:
Rear mainframe. . . . . . . . .. . . . . . .. . . .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 andbottom (min.) 0.87 in. (22 mm)
Weight per ft., minimum 120Ib.(179kg/m)
Minimum vertical section modulus. . . . . . . . . . . . . . . . . . . . 143 in3
Front mainframe. . . . . . . . . . . . . .. . . . . . Welded box sectionfrom
Width 10in.(254mm)
Height, minimum 13in.(330mm)
Thickness, minimum ... ... ...0.63in.(16mm)
Weightperft., minimum .110Ib.(164kg/m)
Minimum vertical section modulus 118in3
mainframe arch to front hood
(2343cm3)
(1935cm3)
Tires:
13.00-24, 12-PR, G2, standard
14.00-24, 12-PR, G2
17.5-25, 12-PR, L2
Dimensions:
Tire
Size Front Rear Front
13.00-24 76.15 in. 79.61 in.
8"rim
(203 mm)
14.00-24
10" rim
(254 mm)
17.5-25 78.40 in. 82.37 in.
14" rim
(356 mm)
Height to top of steering wheel. . . . . . .. . . . . . . . 7 ft. 6 in.(2.29m)
Capacities: U.S. Liters
Fueltank 70gal. 265.0
Cooling system 7gal. 26.5
Engine lubrication,
includingfilter 20qt.
Transmissionand
hydraulicsystem 41gal.
Tandem housings (each) 5 gal.
Worm gearbox 4qt.
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)
Wheel Tread Width Ground Clearance
(1.93m) (2.02m) (2.37m) (2.34m) (559 mm)
76.15 in. 79.61 in. 7ft. 11.5 in. 8ft.
(1.93m) (2.02m) (2.43m) (2.44 m) (572 mm)
(1.99m) (2.09 m) (2.57m) (2.59 m) (589 mm)
7ft. 9.5 in. 7ft. 10 in.
8 It. 5 in. 8ft. 6 in. 23.2 in.
Rear
(Front Axle)
22 in.
22.5 in.
18.9
155.2
18.9
Ripper (Special Equipment): 8 ft. (2.44 m) cut width, parallelogram
Numberofshankpockets 5
Number of shanks 3
Liftaboveground 14.5in.(368mm)
Penetration 14in.(356mm)
Shank size 2x5in.(51x127mm)
Lift above ground (shank in upperposition) 23.5 in. (597mm)
linkage, 2 manual shank vertical positions
3.8
70
Loading...