John Deere MOTOR GRADER 772A - Manual (Page 2)

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: SAE
Net 150hp(112kW)
Gross.. .. .. .. .. .. .. .. .. .. . 160 hp (119 kW)
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 cooling fan.
DIN 70 020
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
Aspiratedair cleanerw/restrictionindicator. . . . . . . . . . . . . . . . Dry
Electrical system. . . . . . . . . . . . . . . . . . 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 (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
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,
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 Foot-operated,hydraulically
actuated, wet-disk, effective on 4 tandem wheels
Parking. . . . . . . . . . . . . . . . . . Foot-operated, mechanical, dry-disk,
effective on 4 tandem wheels
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. . . . . . . . . . . . . . . . . . Wear-resistant high-carbon steel
Length 12ft.(3.66m)
Height 24in.(610mm)
Thickness 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
Shoulder reach outside wheels (frame straight):
Right 88.4in.(2.25m)
Left 89.6in.(2.28m)
Pitch at ground line 44deg.forward
10 deg. back
Blade Lift Mechanism:
Control Dual-lever,hydraulic
Lift Arms: 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)
left 33.5in.(851mm)
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:
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 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:
Height to top of steering wheel. . . . . . . . . . . . . . . 7 ft. 6 in. (2.29 m)
Capacities: U.S. Liters
Fueltank 70gal. 265.0
Cooling system 7gal. 26.5
Engine lubrication,
includingfilter 20qt.
Transmission and
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)
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)
18.9
155.2
18.9
3.8
Tire Wheel Tread Width Ground Clearance
Size Front Rear Front Rear (Front Axle)
13.00-24 76.15 in. 79.61 in. 7ft. 9.5 in. 7ft. 10 in. 22 in.
8"rim (1.93m) (2.02m) (2.37m) (2.34m) (559 mm)
(203 mm)
14.00-24 76.15 in. 79.61 in. 7ft. 11.5 in. 8ft. 22.5 in.
10" rim (1.93m) (2.02m) (2.43m) (2.44 m) (572 mm)
(254 mm)
17.5-25 78.40 in. 82.37 in. 8 It. 5 in. 8ft. 6 in. 23.2 in.
14" rim (1.99m) (2.09 m) (2.57m) (2.59 m) (589 mm)
(356 mm)