| Manufacturer |
J.I. Case |
| Price |
7,600(USD) |
| Model |
770 |
| Equipment Type |
- |
| Factory |
Racine, Wisconsin, USA |
NEBRASKA TRACTOR TEST 1032
| Description |
Gasoline 12-speed 2WD/November 10 - 22, 1969/Link: Nebraska Tractor Test 1032 file/PTO performance/Drawbar performance/Gear 2-High used for power test./Gear 2-Low used for pull test. |
| Power at rated engine speed |
53.53 hp/39.9 kW |
| Fuel use |
5.2 gal/hour/19.7 l/hour |
| Max power |
46.30 hp/34.5 kW |
| Max pull |
7,103 lbs/3221 kg |
NEBRASKA TRACTOR TEST 1033
| Description |
Diesel 8-speed 2WD/November 11 - 22, 1969/Link: Nebraska Tractor Test 1033 file/PTO performance/Drawbar performance/Gear 4-Low used for power test./Gear 2-Low used for pull test. |
| Power at rated engine speed |
56.36 hp/42.0 kW |
| Fuel use |
3.7 gal/hour/14.0 l/hour |
| Max power |
49.18 hp/36.7 kW |
| Max pull |
7,623 lbs/3457 kg |
NEBRASKA TRACTOR TEST 1058
| Description |
Diesel 12-speed 2WD/October 28 - November 7, 1970/Link: Nebraska Tractor Test 1058 file/PTO performance/Drawbar performance/Gear 2-High used for power test./Gear 1-Med used for pull test. |
| Power at rated engine speed |
56.77 hp/42.3 kW |
| Max power |
50.36 hp/37.6 kW |
| Max pull |
7,627 lbs/3459 kg |
NEBRASKA TRACTOR TEST 1058
| Fuel use |
3.7 gal/hour/14.0 l/hour |
NEBRASKA TRACTOR TEST 1061
| Description |
Gasoline 8-speed 2WD/November 6 - 19, 1970/Link: Nebraska Tractor Test 1061 file/PTO performance/Drawbar performance/Gear 4-Low used for power test./Gear 2-Low used for pull test. |
| Power at rated engine speed |
56.32 hp/42.0 kW |
| Fuel use |
5.0 gal/hour/18.9 l/hour |
| Max power |
49.14 hp/36.6 kW |
| Max pull |
7,474 lbs/3390 kg |
NEBRASKA TRACTOR TEST 1088
| Description |
Diesel 8-speed 2WD/November 13 - 23, 1971/Link: Nebraska Tractor Test 1088 file/PTO performance/Drawbar performance/Gear 4-Low used for power test./Gear 1-Low used for pull test. |
| 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 |
| Max power |
56.85 hp/42.4 kW |
| Max pull |
8,853 lbs/4015 kg |
NEBRASKA TRACTOR TEST 1089
| Description |
Diesel 12-speed 2WD/November 15 - 24, 1971/Link: Nebraska Tractor Test 1089 file/PTO performance/Drawbar performance/Gear 3-Low used for power test./Gear 1-Med used for pull test. |
| 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 |
| Max power |
55.95 hp/41.7 kW |
| Max pull |
8,927 lbs/4049 kg |
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 |
ENGINES OVERVIEW
The J.I. Case 770 tractor is equipped with a choice of either a 4.4L 4-cylinder diesel or a 4.1L 4-cylinder gasoline engine, providing flexibility for various applications. The diesel variant offers improved fuel efficiency and torque, making it suitable for heavy-duty tasks, while the gasoline engine is advantageous for lighter, less demanding operations due to its lower initial cost. Potential challenges may include higher maintenance requirements and parts availability for the older diesel models, emphasizing the need for proper service support.
| Description |
J.I. Case 4.4L 4-cyl diesel/J.I. Case 4.1L 4-cyl gasoline |
ENGINE DETAIL 1
The J.I. Case 770 tractor features a 267 ci (4.4 L) liquid-cooled diesel engine, with a notable increase in RPM and power output from 1900 RPM and 60 HP (early models) to 2000 RPM and approximately 68 HP (late models post-serial 8675001). The 16.5:1 compression ratio indicates efficient combustion, enhancing torque and fuel efficiency, though higher compression may require superior quality fuel to avoid knocking. The paper element air cleaner with pre-cleaner aids in maintaining engine performance by reducing particulate intake, making this tractor suitable for diverse agricultural applications, but regular maintenance is critical to ensure optimal functionality.
| Description |
J.I. Case/diesel/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 2
The J.I. Case 770 tractor features a 4-cylinder, 251 ci gasoline engine with a compression ratio of 7.5:1, suitable for moderate power applications. Its liquid-cooled system with a coolant capacity of 28 quarts enhances thermal efficiency, while the rated RPM of 1900 allows for steady operational performance under load. However, the relatively low compression and RPM may limit its power output compared to modern tractors, making it more suited for light to medium agricultural tasks or residential use.
| Description |
J.I. Case/gasoline/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 |
J.I. CASE 770 ENGINES
The J.I. Case 770 tractor offers a choice between a 4.4L diesel and a 4.1L gasoline engine, providing versatility for various agricultural applications. With a substantial 50-gallon fuel tank, it is designed for extended operational periods, reducing downtime for refueling. However, potential challenges may arise related to fuel choice, as the diesel engine generally offers better torque and fuel efficiency, while the gasoline variant may provide easier starting in colder conditions.
| Description |
J.I. Case 4.4L 4-cyl diesel/J.I. Case 4.1L 4-cyl gasoline |
| Fuel tank |
50 gal/189.3 L |
TRANSMISSIONS OVERVIEW
The J.I. Case 770 tractor features an 8-speed unsynchronized gearbox, which may lead to gear grinding if not shifted carefully, highlighting a potential usability challenge. However, its 12-speed partial power shift system enhances operational efficiency by allowing smoother transitions under load, optimizing performance for varying field conditions. This dual transmission setup is advantageous for tasks requiring both low-speed torque and high-speed transport capabilities.
| Description |
8-speed unsynchronized gear/12-speed partial power shift |
TRANSMISSION 1
The J.I. Case 770 tractor features an unsynchronized 8 forward and 2 reverse gear system, which can pose challenges during gear shifting, especially under load or when operating on inclines. Its 304.8 mm dry disc clutch provides substantial torque transfer and durability but may require more frequent maintenance compared to hydraulic clutches. This tractor is ideal for applications requiring consistent speed variations, such as plowing or transport, but operators should be prepared for a learning curve in mastering the gear engagement.
| Type |
unsynchronized gear |
| Gears |
8 forward and 2 reverse |
| Clutch |
304.8mm dry disc |
TRANSMISSION 2
The J.I. Case 770 features a partial power shift transmission with 12 forward and 4 reverse gears, allowing for efficient speed and torque management during varied field operations. This setup offers smoother shifting through its hydraulic wet disc clutch system, enhancing durability and reducing wear over time. However, while the power shift mechanism improves productivity, it may lead to increased complexity in operation for inexperienced users.
| Transmission |
Range Power Shift |
| Type |
partial power shift |
| Gears |
12 forward and 4 reverse |
| Clutch |
hydraulic wet discs |
| Description |
Four gears each with reverse and a three-speed forward powershift. |
MECHANICAL
The J.I. Case 770 tractor features a 4x2 2WD chassis, providing less traction on uneven terrain compared to 4WD models, which may limit its effectiveness in heavy soil conditions. Its power steering enhances maneuverability, but the open operator station may expose the operator to environmental elements, potentially affecting comfort during prolonged use. The 8-speed unsynchronized gear and 12-speed partial power shift transmission afford improved versatility and adaptability for varying field tasks, though the unsynchronized system could result in shifting challenges in demanding applications.
| Chassis |
4x2 2WD |
| Steering |
power |
| Brakes |
differential hydraulic dry disc |
| Cab |
Open operator station. Cab optional. |
| Transmissions |
8-speed unsynchronized gear/12-speed partial power shift |
HYDRAULICS
| Pump flow |
16 gpm/60.6 lpm |
| Total flow |
24 gpm/90.8 lpm |
| Steering flow |
8 gpm/30.3 lpm |
TRACTOR HITCH
POWER TAKE-OFF (PTO)
| Rear PTO |
independent |
| Rear RPM |
540 (1.375)/540/1000 (1.375) |
| Engine RPM |
540@1900/1000@1900 |
J.I. CASE 770 TIRES
The J.I. Case 770 tractor is equipped with agricultural front tires sized 7.5L-15 and rear tires sized 16.9-34, providing a balanced combination of flotation and traction for diverse field conditions. The larger rear tires enhance stability and power transfer during tillage or heavy-duty tasks, whereas the front tires support steering precision. However, users may need to be cautious of potential ground compaction in softer soils due to the heavier rear configuration.
| 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 |
DIMENSIONS & TIRES
The J.I. Case 770 tractor features a wide-front wheelbase of 101 inches, providing enhanced stability during heavy-duty operations, particularly on uneven terrain. Weighing 9,220 lbs and equipped with larger rear tires (16.9-34), it offers substantial traction for field work, though its tricycle wheelbase (94 inches) may lead to reduced stability during sharp turns. Ideal for agricultural applications, this tractor's design balances maneuverability and stability, but operators must be cautious in environments with steep inclines or tight spaces.
| 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 |
770 SERIAL NUMBERS
| 1969 |
8356251 |
| 1970 |
8650001 |
| 1971 |
8674001 |
| 1972 |
8691801 |
