Oliver 660
Built: 1959–1964 · Series: THREE-DIGIT-SERIE
More machines from model year 1959
Oliver three-digit series (1958–1964) – 440 to 995 from Charles City: the hundreds number as size class, 990 GM and 995 Lugmatic with GM two-stroke diesel, petrol, LPG and diesel
The three-digit series was Oliver's programme of 1958 to 1964, the transition from the Super models of the 1950s to the four-digit ranges – and the period in which White Motor took over the maker from Charles City, Iowa, in 1960. The type logic: the hundreds number orders the size class in ascending order – 440 the small row-crop tractor (successor to the Super 44), 550 about 40 hp, 660 about 50, 770 about 55, 880 about 65, 950 about 80 hp – and the 990 GM and 995 Lugmatic are the big models with the 3-71 two-stroke diesel from General Motors (Detroit Diesel), which Oliver offered as an alternative to its own engines; Lugmatic denotes the version with torque-converter transmission. The own engines are three-, four- and six-cylinders of 2.3 to 4.9 litres, most available as petrol, LPG or diesel, at rated speeds of 1,750 to 2,000 rpm.
Read on 3 more paragraphs
The register lists 8 versions with 19.9 to 63.7 kW from engines of 2,288 to 4,942 cm³, unladen weights from 1,268 to 5,101 kg, lengths from 3,045 to 3,657 mm, widths from 1,695 to 2,055 mm and heights from 1,861 to 2,286 mm.
The series brought Oliver's hallmark of those years – the six-cylinder smoothness argument of the 770 and 880 against the competitors' four-cylinders – and the GM models are among the loudest and most sought-after collector tractors of North America.
On used tractors, originality, engine condition and carburettor or injection, blower and injectors on the GM two-stroke, clutch, gearbox and hydraulics, sheet metal and tyres count; parts run through Oliver collector dealers.
Sources: SpecCodex register, model data: Oliver Dreistellige Serie, Oliver Farm Equipment Company (Wikipedia)
Technical data
Engine
| Fuel | Benzin/Dieselcorrect |
|---|---|
| Power | 34 hp (25 kW)correct |
| Rated speed | 2,000 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 2,537 cm³correct |
| Bore | 92.08 mmcorrect |
| Stroke | 95.25 mmcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,414 mmcorrect |
|---|---|
| Width | 2,055 mmcorrect |
| Height | 1,861 mmcorrect |
| Wheelbase | 2,337 mmcorrect |
| Ground clearance | 612 mmcorrect |
| Unladen weight | 1,388 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 6 V/2 Rcorrect |
| Forward gears | 6correct |
| Reverse gears | 2correct |
| Front tyres | 5.00-16correct |
| Rear tyres | 9-38correct |
| Top speed | 17 km/hcorrect |
Working data
| Fuel tank capacity | 49 lcorrect |
|---|
Origin and approval
| Construction | frame constructioncorrect |
|---|
Where this model stands
Power-to-weight ratio: 18 kW/t (25 kW / 1.4 t)
Power class: Compact (< 40 hp)
Stronger than 20% of the tractors in the register — out of 15,663 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the Oliver 660 have?
The Oliver 660 delivers 34 hp.
How much does the Oliver 660 weigh?
The unladen weight is 1,388 kg.
What engine does the Oliver 660 have?
4 cylinders, 2,537 cm³ displacement, Benzin/Diesel.
How fast does the Oliver 660 go?
Top speed is 17 km/h.
What are the dimensions of the Oliver 660?
3,414 mm × 2,055 mm × 1,861 mm.
When was the Oliver 660 built?
Production years: 1959–1964.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Check the weights in the papers against the figures here — attachments change them.
- Check front and rear tyre sizes: mismatched pairs strain the drivetrain.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- Load the hydraulics and watch for sag.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
We do not sell machines. We ask the dealers who carry this model and come back with price and lead time.
Request a quote →
We ask the suppliers and come back with price and lead time.
Request spare parts →
This page carries 25 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
Missing a figure you were looking for? Report it →
Know this machine better? Have a photo, a manual, or know that a figure is wrong? Add it to the register →
Other models in this series
Sources: [1]
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.