J.I. Case 770

The J.I. Case 770 is a tractor produced by J I Case. It is equipped with a 251 ci 4.1 L engine. The rated power output is 64.56 hp 48.1 kW. Transmission: Range Power Shift. Operating weight: 9,220 lbs 4182 kg.

Overview

	1969 - 1972	1969 - 1972

Production
Manufacturer	J.I. Case
Built in Racine, Wisconsin, USA
Total built	1,690
Original price was $7,600 in 1973

J.I. Case 770 Power
Drawbar (claimed)	49 hp 36.5 kW
PTO (claimed)	56 hp 41.8 kW
Drawbar (tested)	56.85 hp 42.4 kW
PTO (tested)	64.56 hp 48.1 kW
Performance test details ...

Mechanical
Two-wheel drive
Power steering
Differential hydraulic dry disc brakes
Open operator station. Cab optional.

Hydraulics
Type	open center
Pump flow	16 gpm 60.6 lpm
Total flow	24 gpm 90.8 lpm
Steering flow	8 gpm 30.3 lpm

Tractor hitch
Rear Type	II

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	540 (1.375)
	540/1000 (1.375)
Engine RPM	540@1900
	1000@1900

Dimensions & Tires
Wide-front Wheelbase	101 inches 256 cm
Tricycle Wheelbase	94 inches 238 cm
Weight	9,220 lbs 4182 kg
Front tire	7.5L-15
Rear tire	16.9-34
Full dimensions and tires ...

References
Jet-Age 770-890-970-1070 Tractors published in 1970, by J.I. Case
Agri King Tractor published in 1969, by J.I. Case
Buyers Guide for '70 published in 1970, by J.I. Case

Engine

Engine options
J.I. Case 4.4L 4-cyl diesel
J.I. Case 4.1L 4-cyl gasoline

Engine Detail — 267 ci / 4.4 L Diesel

Manufacturer	J.I. Case
Fuel Type	Diesel
Configuration	4-cylinder, liquid-cooled
Engine RPMs increased from 1900 to 2000 starting at serial number 8675001, creating an increase of about 8 horsepower.
Displacement	267 ci 4.4 L
Bore/Stroke	4.125x5.00 inches 105 x 127 mm
Air cleaner	paper element with pre-cleaner
Compression	16.5:1
Rated RPM	1900 (early)
	2000 (late)
Starter volts	12

Engine Detail — 251 ci / 4.1 L Gasoline

Manufacturer	J.I. Case
Fuel Type	Gasoline
Configuration	4-cylinder, liquid-cooled
Displacement	251 ci 4.1 L
Bore/Stroke	4.00x5.00 inches 102 x 127 mm
Air cleaner	paper element with precleaner
Compression	7.5:1
Rated RPM	1900
Starter volts	12
Coolant capacity	28 qts 26.5 L

Transmission

Transmission options
8-speed unsynchronized gear
12-speed partial power shift

Transmission — 8 forward and 2 reverse unsynchronized gear

Type	unsynchronized gear
Gears	8 forward and 2 reverse
Clutch	304.8mm dry disc

Transmission — Range Power Shift

Transmission	Range Power Shift
Type	partial power shift
Gears	12 forward and 4 reverse
Clutch	hydraulic wet discs
Four gears each with reverse and a three-speed forward powershift.

Dimensions

J.I. Case 770 Tires
Ag front	7.5L-15
Ag rear	16.9-34

Dimensions
Wide-front Wheelbase	101 inches 256 cm
Tricycle Wheelbase	94 inches 238 cm
Length	153 inches 388 cm
Height (hood)	67 inches 170 cm
Operating weight	9,220 lbs 4182 kg
Ballasted weight	10,950 lbs 4966 kg
Ground clearance	15 inches 38 cm
Front tread	60 to 88 inches 152 to 223 cm
Rear tread	60 to 88 inches 152 to 223 cm

Tests

Tractor Tests
NTTL 1032: gasoline 12-speed 2WD
NTTL 1033: diesel 8-speed 2WD
NTTL 1058: diesel 12-speed 2WD
NTTL 1061: gasoline 8-speed 2WD
NTTL 1088: diesel 8-speed 2WD
NTTL 1089: diesel 12-speed 2WD

Nebraska Tractor Test 1032
Gasoline 12-speed 2WD November 10 - 22, 1969 Link: Nebraska Tractor Test 1032 file
PTO performance
Power at rated engine speed	53.53 hp 39.9 kW
Fuel use	5.0 gal/hour 18.9 l/hour
Drawbar performance
Max power	46.30 hp 34.5 kW
Fuel use	5.2 gal/hour 19.7 l/hour
Gear 2-High used for power test.
Max pull	7,103 lbs 3221 kg
Gear 2-Low used for pull test.

Nebraska Tractor Test 1033
Diesel 8-speed 2WD November 11 - 22, 1969 Link: Nebraska Tractor Test 1033 file
PTO performance
Power at rated engine speed	56.36 hp 42.0 kW
Fuel use	3.6 gal/hour 13.6 l/hour
Drawbar performance
Max power	49.18 hp 36.7 kW
Fuel use	3.7 gal/hour 14.0 l/hour
Gear 4-Low used for power test.
Max pull	7,623 lbs 3457 kg
Gear 2-Low used for pull test.

Nebraska Tractor Test 1058
Diesel 12-speed 2WD October 28 - November 7, 1970 Link: Nebraska Tractor Test 1058 file
PTO performance
Power at rated engine speed	56.77 hp 42.3 kW
Fuel use	3.8 gal/hour 14.4 l/hour
Drawbar performance
Max power	50.36 hp 37.6 kW
Fuel use	3.7 gal/hour 14.0 l/hour
Gear 2-High used for power test.
Max pull	7,627 lbs 3459 kg
Gear 1-Med used for pull test.

Nebraska Tractor Test 1061
Gasoline 8-speed 2WD November 6 - 19, 1970 Link: Nebraska Tractor Test 1061 file
PTO performance
Power at rated engine speed	56.32 hp 42.0 kW
Fuel use	5.0 gal/hour 18.9 l/hour
Drawbar performance
Max power	49.14 hp 36.6 kW
Fuel use	5.0 gal/hour 18.9 l/hour
Gear 4-Low used for power test.
Max pull	7,474 lbs 3390 kg
Gear 2-Low used for pull test.

Nebraska Tractor Test 1088
Diesel 8-speed 2WD November 13 - 23, 1971 Link: Nebraska Tractor Test 1088 file
PTO performance
Power at rated engine speed	63.90 hp 47.7 kW
Fuel use	4.3 gal/hour 16.3 l/hour
Power at rated PTO speed	62.85 hp 46.9 kW
Fuel use	4.1 gal/hour 15.5 l/hour
Drawbar performance
Max power	56.85 hp 42.4 kW
Fuel use	4.3 gal/hour 16.3 l/hour
Gear 4-Low used for power test.
Max pull	8,853 lbs 4015 kg
Gear 1-Low used for pull test.

Nebraska Tractor Test 1089
Diesel 12-speed 2WD November 15 - 24, 1971 Link: Nebraska Tractor Test 1089 file
PTO performance
Power at rated engine speed	64.56 hp 48.1 kW
Fuel use	4.4 gal/hour 16.7 l/hour
Power at rated PTO speed	61.93 hp 46.2 kW
Fuel use	4.2 gal/hour 15.9 l/hour
Drawbar performance
Max power	55.95 hp 41.7 kW
Fuel use	4.4 gal/hour 16.7 l/hour
Gear 3-Low used for power test.
Max pull	8,927 lbs 4049 kg
Gear 1-Med used for pull test.