John Deere 650 and 750 Tractors Specifications

The John Deere 650 and 750 were Yanmar-built compact utility tractors produced from 1981 to 1989 as part of Deere's 50 Compact Series. The 650 ran a 2-cylinder diesel rated at 14.5 PTO horsepower, while the larger 750 used a 3-cylinder diesel rated at 18.0 PTO horsepower. Both shared a two-range, eight-speed gearbox, open-center hydraulics, and a transmission-driven 540-rpm PTO. The figures below are the factory observed PTO horsepower and service specifications as published in the operator's manual — note that these PTO ratings are lower than the gross engine horsepower (roughly 16–18 hp) quoted by some secondary sources.

Engine

Specification	650 Tractor	750 Tractor
Engine type	2-cylinder, in-line, valve-in-head, diesel	3-cylinder, in-line, valve-in-head, diesel
Factory observed PTO horsepower	10.8 kW (14.5 hp) at 2600 rpm	13.4 kW (18.0 hp) at 2400 rpm
Slow idle speed	800 rpm	800 rpm
Fast idle speed	2725 rpm	2540 rpm
Working speed range	1825 to 2600 rpm	1650 to 2400 rpm
Bore and stroke	80 x 85 mm (3.15 x 3.35 in.)	80 x 85 mm (3.15 x 3.35 in.)
Displacement	0.9 L (52.0 cu. in.)	1.3 L (78.0 cu. in.)
Compression ratio	22.5 to 1	22.5 to 1
Firing order (No. 1 in rear)	1-2	1-3-2
Valve clearance — intake (cold)	0.20 mm (0.008 in.)	0.15 mm (0.006 in.)
Valve clearance — exhaust (cold)	0.20 mm (0.008 in.)	0.15 mm (0.006 in.)
Injection pump timing	22° BTDC	22° BTDC
Lubrication system	Force-feed, pressurized with full-flow filter	Force-feed, pressurized with full-flow filter

Fuel System

Specification	650 Tractor	750 Tractor
Type	Precombustion chamber	Precombustion chamber
Injection pump type	Plunger	Plunger
Air cleaner	Dry type	Dry type

Cooling System

Specification	650 Tractor	750 Tractor
Type	Pressurized with centrifugal pump	Pressurized with centrifugal pump
Temperature control	Heavy-duty thermostat	Heavy-duty thermostat

Capacities

Specification	650 Tractor	750 Tractor
Fuel tank	23.5 L (6.2 U.S. gal.)	23.5 L (6.2 U.S. gal.)
Cooling system	3.8 L (4.0 U.S. qt.)	4.3 L (4.5 U.S. qt.)
Crankcase (with filter change)	2.4 L (2.5 U.S. qt.)	3.8 L (4.0 U.S. qt.)
Transmission-hydraulic system	13.2 L (14 U.S. qt.)	14.2 L (15 U.S. qt.)
Front-wheel-drive axle housing	3.0 L (3.2 U.S. qt.)	6.5 L (6.9 U.S. qt.)

Transmission

Specification	650 Tractor	750 Tractor
Type	2-speed range selector and 4-speed gear selector	2-speed range selector and 4-speed gear selector
Gear selections	8 forward and 2 reverse	8 forward and 2 reverse
Clutch	Single-disk, dry	Single-disk, dry

Power Take-Off

Specification	650 Tractor	750 Tractor
Type	Transmission driven, with over-running clutch	Transmission driven, with over-running clutch
PTO speed (engine speed)	540 rpm (2356 rpm)	540 rpm (2295 rpm)
Size	35 mm (1-3/8 in.)	35 mm (1-3/8 in.)
Clutch	Uses transmission clutch	Uses transmission clutch

Hydraulic System

Specification	650 Tractor	750 Tractor
Type	Open center, constant flow	Open center, constant flow
Working pressure	13905 kPa (139 bar / 2030 psi)	13905 kPa (139 bar / 2030 psi)
Pump	Gear pump, engine-driven	Gear pump, engine-driven

Brakes & Electrical

Specification	650 Tractor	750 Tractor
Brakes	Mechanical dry, internal expanding shoe	Mechanical dry, internal expanding shoe
Electrical system	12-volt, negative ground	12-volt, negative ground
Battery	One 12-volt, BCI group 24, 370 amps cold cranking, 106 minutes reserve capacity	One 12-volt, BCI group 24, 370 amps cold cranking, 106 minutes reserve capacity
Alternator	15-amp	15-amp

Dimensions & Weight

Specification	650 Tractor	750 Tractor
Wheelbase	1425 mm (56 in.)	1550 mm (61 in.)
Overall length	2606 mm (102.5 in.)	2845 mm (112.0 in.)
Height to muffler top*	1965 mm (77.4 in.)	2004 mm (78.9 in.)
Height to top of ROLL-GARD frame*	1865 mm (73.4 in.)	1904 mm (75.0 in.)
Overall width	1041 mm (41.0 in.)	1132 mm (44.6 in.)
Turning radius with brakes	1.9 m (6.2 ft.)	2.2 m (7.2 ft.)
Shipping weight**	690 kg (1520 lbs.)	817 kg (1800 lbs.)

Wheels & Tires

Specification	650 Tractor	750 Tractor
Standard rear tires*	9.5-16	9.5-24
Standard front tires*	5.00-12	4.00-15

^* Height, dimension and shipping-weight figures reflect the standard tire equipment shown above (650: 9.5-16 rear / 5.00-12 front; 750: 9.5-24 rear / 4.00-15 front). Add 50 kg (110 lbs.) to the 650 and 84 kg (186 lbs.) to the 750 when equipped with front-wheel drive.
^** Shipping weight is for a tractor equipped for average field service, without fuel or ballast.