Wikitractor

J.I. Case 770

Production ended · 2WD

PTO power · claimed

56 hp

Weight
9,220 lb
Engines
2 Diesel · Gasoline
Built
1,690
Price new · 1973
$7,600

Power

Engineno record
PTO56 hp claimed
PTO, tested64.6 hp
Drawbar49 hp claimed
Drawbar, tested56.8 hp
Listed power62 hp PTO basis

Engines

J.I. Case 4.4L 4-cyl dieselDiesel · 4 cyl267 ci
J.I. Case 4.1L 4-cyl gasolineGasoline · 4 cyl251 ci
Engine details
J.I. Case 4.4L 4-cyl diesel
Bore × stroke
4.13 in × 5 in
Rated speed
1,900 rpm
Compression
16.5:1
Cooling
liquid-cooled
Notes
Engine RPMs increased from 1900 to 2000 starting at serial number 8675001, creating an increase of about 8 horsepower.
J.I. Case 4.1L 4-cyl gasoline
Bore × stroke
4 in × 5 in
Rated speed
1,900 rpm
Compression
7.5:1
Cooling
liquid-cooled

Transmissions

8-speed unsynchronized gearunsynchronized gear8F / 2R
Range Power Shiftpartial power shift12F / 4R
Transmission notes

Range Power Shift: Four gears each with reverse and a three-speed forward powershift.

Weight

Weight9,220 lb operating
Ballasted10,950 lb

Dimensions

Wheelbase101 in
Length153 in
Ground clearance15 in
Front tread, narrowest60 in
Front tread, widest88 in
Rear tread, narrowest60 in
Rear tread, widest88 in

Capacities

Fuel tank50 gal

Hydraulics

Systemopen center
Pump flow16 gpm
Total flow24 gpm
Steering flow8 gpm

Hitch

Rear hitch categoryII
Rear lift capacityno record

PTO

Rear PTOindependent
Rear PTO speeds540 (1.375)
Engine rpm at PTO speed540@1900

Chassis

Drive2WD
SteeringPower steering
BrakesDifferential hydraulic dry disc brakes
CabOpen operator station. Cab optional

Tires

Front7.5L-15
Rear16.9-34

Production

Total built1,690
Price new$7,600 (1973)
FactoriesRacine, Wisconsin, USA
Built byJ.I. Case

Serial numbers

YearFirst serial
19698356251
19708650001
19718674001
19728691801

Literature

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