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Backhoe Loader · 1981Unverified

J.I. Case 780B Construction King

Name: J.I. Case 780B Construction King
Brand: J.I. Case

J.I. Case 780B Construction King — Backhoe loader tractor · 120 hp. Reference specifications; pending source verification.

The J.I. Case 780B Construction King is a backhoe loader model rated at 120 hp — placing it among the higher-powered machines in its class. It was manufactured from 1981 to 1985. Under the hood is a 4-cylinder diesel liquid-cooled engine, driving through two-wheel drive with a powershift transmission. Listed weight is 21083 to 22908 pounds, and it is aimed at jobs of around 200–800 ac. Full UK and US specifications are listed below, each with its source.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

120 hp

Weight

21083 to 22908 pounds

Catalogue coverage

Variants represented

Richest spec table

87 rows

Recorded power

120 hp

Recorded weight

9563 kg

Transmissions

3-speed power shift

Production years

1981-1985

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

ManufacturerJ.I. CaseReference

Backhoe loader tractorReference

Two-wheel driveReference

Final drivesoutboard planetaryReference

Power steeringReference

Four-post ROPS canopy. Cab optional with available air-conditioning.Reference

Engine

J.I. Case 5.5L 4-cyl dieselReference

Engine (gross)89.5 kWReference

Engine (net)82.8 kWReference

J.I. Case A336BDTReference

dieselReference

4-cylinderReference

liquid-cooledReference

Displacement5.5 LReference

Bore/Stroke117 x 127 mmReference

Power (net)82.8 kWReference

Power (gross)89.5 kWReference

Fuel systemdirect injevtionReference

Air cleanerdryReference

Compression15.8:1Reference

Rated RPM2200Reference

Torque451.5 NmReference

Torque RPM1500Reference

StarterelectricReference

Starter volts24Reference

Oil capacity11.4 LReference

Coolant capacity34.1 LReference

Transmission

3-speed power shiftReference

Typepower shiftReference

Gears3 forward and reverseReference

Three-speed power shift transmission with power shuttle and torque converter.Reference

Capacities

Fuel124.9 LReference

PTO & Hydraulics

Hydraulic system71.5 LReference

Typeopen centerReference

Capacity71.5 LReference

Pump flow111.7 lpmReference

Pump flow98.4 lpmReference

Total flow210.1 lpmReference

Dimensions

Wheelbase220 cmReference

Weight21083 to 22908 poundsReference

Front tire14x17.5Reference

Rear tire18.4x24Reference

Industrial front14x17.5Reference

Industrial rear18.4x24Reference

Length762 cmReference

Width251 cmReference

Weight9563 kgReference

Weight10391 kgReference

Front tread198 cmReference

Rear tread180 cmReference

Steering wheel215 cmReference

Backhoe & Loader

Dump angle124 cmReference

Electrical

GroundnegativeReference

Charging systemalternatorReference

Charging amps40Reference

Batteries2Reference

Battery CCA600Reference

Battery volts12Reference

Attachment overview

Front-end loaderReference

BackhoeReference

J.I. Case Backhoe

Backhoe typeJ.I. Case BackhoeReference

Transport height401 cmReference

2-Foot flat digging depth556 cmReference

Reach from pivot668 cmReference

Loading height345 cmReference

Bucket Rotation156°Reference

Swing Arc180°Reference

Bucket force6187 kgReference

Dipperstick force4975 kgReference

J.I. Case Extendahoe Backhoe

Backhoe typeJ.I. Case Extendahoe BackhoeReference

Transport height398 cmReference

Digging depth (retracted stick)556 cmReference

Digging depth (extended stick)670 cmReference

Reach from pivot (retracted stick)665 cmReference

Reach from pivot (extended stick)777 cmReference

Loading height (retracted stick)378 cmReference

Loading height (extended stick)441 cmReference

Bucket Rotation151°Reference

Swing Arc180°Reference

Bucket force (retracted stick)6233 kgReference

Bucket force (extended stick)6233 kgReference

Dipperstick force (retracted stick)5032 kgReference

Dipperstick force (extended stick)3691 kgReference

J.I. Case 780B Height

Cab292 cmReference

Exhaust322 cmReference

Backhoe401 cmReference

Speeds

With 18.4x24 rear tires.Reference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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