Compare/J.I. Case 403 vs J.I. Case 640

J.I. Case 403 vs J.I. Case 640

Verdict: J.I. Case 403 vs J.I. Case 640

The J.I. Case 403 and the J.I. Case 640 are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 50 hp. J.I. Case 640 is the lighter machine (2,041 kg vs 3,039 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. J.I. Case 640 is the newer design (1960 vs 1955). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.

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Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

J.I. Case

Fit score

Best match

Clear

J.I. Case

Fit score

Best match

Clear

Rated power

50 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

J.I. CaseReference

With 12-38 rear tires.Reference

Tractors equipped with the Case-o-Matic were sometimes referred to as the 630C.Reference

Total built

67Reference

—

Original price

$5,000 (1958)Reference

$3,900Reference

Steering

power optionalReference

power assistReference

Factories

—

Racine, Wisconsin, USAReference

Variants

400

diesel standardReference

—

401

diesel row-cropReference

—

402

diesel vineyardReference

—

403

diesel high-cropReference

—

405

diesel orchardReference

—

413

gasoline high-cropReference

—

420

diesel industrialReference

—

630

—

diesel standardReference

631

—

diesel row-cropReference

640

—

gas standardReference

641

—

gas row-cropReference

Engine

Belt (claimed)

37.3 kWReference

38.8 kWReference

Plows

4 (14-inch)Reference

—

Displacement

4.1 LReference

3.1 LReference

Bore/Stroke

102 x 127 mmReference

97 x 105 mmReference

Air cleaner

oil bathReference

Pre-heating

ether capsulesReference

—

Compression

15:1Reference

7.34:1Reference

Rated RPM

1500Reference

2250Reference

Idle RPM

600-1600Reference

—

Firing order

1-3-4-2Reference

—

Starter volts

12Reference

Coolant capacity

28.0 LReference

—

Intake valve clearance

0.305 mmReference

—

Exhaust valve clearance

0.305 mmReference

—

Oil capacity

56.8 LReference

—

Oil change

120 hReference

—

Fuel tank

—

83.3 LReference

Drawbar (tested)

—

32.3 kWReference

Power at rated engine speed

—

37.7 kWReference

Max power

—

31.3 kWReference

Transmission

Powr-rangeReference

Case Dual-RangeReference

Gears

8 forward and 2 reverseReference

4 forward and 1 reverseReference

Oil type

SAE 90Reference

—

Clutch

—

dry discReference

Capacities

Fuel

79.5 LReference

—

Diameter

26 cmReference

23 cmReference

Width

18 cmReference

15 cmReference

RPM

1128Reference

—

Speed

945.18 meters/minReference

—

PTO & Hydraulics

Hydraulic system

9.8 LReference

—

Capacity

9.8 LReference

—

Pressure

41.4 barReference

—

Valves

2 (optional)Reference

—

Total flow

45.4 lpmReference

—

Type

Case Eagle HitchReference

gearReference

Rear PTO

independentReference

independent (Case-o-matic)Reference

Rear PTO Type

540 (1.375)Reference

540/1000 (1.375)Reference

PTO (tested)

—

37.7 kWReference

Power at rated PTO speed

—

37.1 kWReference

Dimensions

Weight

3039 kgReference

2041 kgReference

Front tire

7.50-20Reference

7.50-16Reference

Rear tire

12-38Reference

16.9-28Reference

Ag front

7.50-20Reference

7.50-16Reference

Ag rear

13-38Reference

16.9-28Reference

Front tread

138 to 201 cmReference

132 cmReference

Rear tread

152 to 228 cmReference

121 to 193 cmReference

403 Serial Numbers

1955

8060000Reference

—

1956

8080001Reference

—

1957

8100001Reference

—

Location:

Top-right of instrument panel.Reference

—

Electrical

Ground

negativeReference

—

Charging system

generatorReference

—

Charging volts

12Reference

—

Batteries

2Reference

—

Battery volts

6Reference

—

Battery AH

150Reference

—

Speeds

640 Serial Number Location

Test results

Fuel use

—

15.1 l/hourReference

Max pull

—

3117 kgReference

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.