Oliver 660

The Oliver 660 is a tractor produced by Oliver. It is equipped with a 155 ci 2.5 L engine. The rated power output is 33.69 hp 25.1 kW. Transmission: 6 forward and 2 reverse. Operating weight: 3128 to 3178 pounds.

Overview

	1959 - 1964 Row-Crop tractor
1959 - 1964
Row-Crop tractor

Production
Manufacturer	Oliver
Row-Crop tractor
Original price was $3,450 in 1964

Oliver 660 Transmission
6-speed unsynchronized gear
Transmission details ...

Oliver 660 Power
PTO (claimed)	41 hp 30.6 kW
Plows	3
Drawbar (tested)	27.99 hp 20.9 kW
Belt (tested)	33.69 hp 25.1 kW
Performance test details ...

Mechanical
Two-wheel drive
Open operator station.

Capacity
Fuel	13 gal 49.2 L
Hydraulic system	9.5 gal 36.0 L

Hydraulics
Capacity	9.5 gal 36.0 L
Pump flow	8 gpm 30.3 lpm

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	540
Engine RPM	533@1750

Dimensions & Tires
Wheelbase	92 inches 233 cm
Weight	3128 to 3178 pounds
Front tire	5.00-16
Rear tire	9-38
Full dimensions and tires ...

References
New Full 3-Plow 660 Tractor published in 1958, by Oliver

Engine

Engine options
Waukesha-Oliver 2.5L 4-cyl gasoline
Waukesha-Oliver 2.5L 4-cyl diesel

Engine Detail — 155 ci / 2.5 L Gasoline

Manufacturer	Waukesha-Oliver
Fuel Type	Gasoline
Configuration	4-cylinder, liquid-cooled
Displacement	155 ci 2.5 L
Bore/Stroke	3.62x3.75 inches 92 x 95 mm
Compression	7.75:1
Rated RPM	2000
Starter volts	12
Oil capacity	4 qts 3.8 L
Coolant capacity	14 qts 13.2 L

Engine Detail — 155 ci / 2.5 L Diesel

Manufacturer	Waukesha-Oliver
Fuel Type	Diesel
Configuration	4-cylinder, liquid-cooled
Displacement	155 ci 2.5 L
Bore/Stroke	3.62x3.75 inches 92 x 95 mm
Compression	16:1
Starter volts	12

Transmission

Transmission — 6 forward and 2 reverse unsynchronized gear

Type	unsynchronized gear
Gears	6 forward and 2 reverse
Clutch	235mm dry disc
With 9-38 rear tires.

Dimensions

Oliver 660 Tires
Ag front	5.00-16
Ag rear	9-38
Ag front	6.00-16
Ag rear	10-38
	12.4-38

Dimensions
Wheelbase	92 inches 233 cm
Length	134.4 inches 341 cm
Width	80.9 inches 205 cm
Height	87.4 inches 221 cm
Gas Shipping weight	3128 lbs 1418 kg
Diesel Shipping weight	3178 lbs 1441 kg
Ground clearance	24.1 inches 61 cm

Tests

Tractor Tests
NTTL 541: gasoline 6-speed 2WD
NTTL 544: diesel 6-speed 2WD

Nebraska Tractor Test 541
Gasoline 6-speed 2WD May 16 - 19, 1955 Link: Nebraska Tractor Test 541 file
Belt power (max)	33.62 hp 25.1 kW
Belt fuel use (max)	3.1 gal/hour 11.7 l/hour
Drawbar performance
Max power	27.99 hp 20.9 kW
Gear 4 used for power test.
Max pull	4,309 lbs 1954 kg
Gear 1 used for pull test.

Nebraska Tractor Test 544
Diesel 6-speed 2WD May 19 - 26, 1955 Link: Nebraska Tractor Test 544 file
Belt power (max)	33.69 hp 25.1 kW
Belt fuel use (max)	2.4 gal/hour 9.1 l/hour
Drawbar performance
Max power	27.48 hp 20.5 kW
Gear 4 used for power test.
Max pull	4,393 lbs 1992 kg
Gear 1 used for pull test.

Photos

Early Oliver 660 row-crop

Oliver 660 showing the late-series decals

Oliver 660 showing the late-series decals

Oliver 660 showing the late-series decals

Oliver 660 showing the late-series decals

Oliver 660