Tractor · 1959Unverified
Oliver 660
Oliver 660 — Row-Crop tractor · 41 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
41 hp
Max power
20.9 kW
Weight
3128 to 3178 pounds
Hover a source tag to verify
Overview
ManufacturerOliverReference
Row-Crop tractorReference
Original price was $3,450 in 1964Reference
Two-wheel driveReference
Open operator station.Reference
Engine
Waukesha-Oliver 2.5L 4-cyl gasolineReference
Waukesha-Oliver 2.5L 4-cyl dieselReference
Plows3Reference
Drawbar (tested)20.9 kWReference
Belt (tested)25.1 kWReference
Waukesha-OliverReference
gasolineReference
4-cylinderReference
liquid-cooledReference
Displacement2.5 LReference
Bore/Stroke92 x 95 mmReference
Compression7.75:1Reference
Rated RPM2000Reference
Starter volts12Reference
Oil capacity3.8 LReference
Coolant capacity13.2 LReference
dieselReference
Compression16:1Reference
Belt power (max)25.1 kWReference
Max power20.9 kWReference
Belt power (max)25.1 kWReference
Max power20.5 kWReference
Transmission
6-speed unsynchronized gearReference
Typeunsynchronized gearReference
Gears6 forward and 2 reverseReference
Clutch235mm dry discReference
PTO & Hydraulics
PTO (claimed)30.6 kWReference
Hydraulic system36.0 LReference
Capacity36.0 LReference
Pump flow30.3 lpmReference
Rear PTOindependentReference
Rear PTO Type540Reference
Engine RPM533@1750Reference
Capacities
Fuel49.2 LReference
Dimensions
Wheelbase233 cmReference
Weight3128 to 3178 poundsReference
Front tire5.00-16Reference
Rear tire9-38Reference
Ag front5.00-16Reference
Ag rear9-38Reference
Ag front6.00-16Reference
Ag rear10-38Reference
Ag rear12.4-38Reference
Length341 cmReference
Width205 cmReference
Height221 cmReference
Gas Shipping weight1418 kgReference
Diesel Shipping weight1441 kgReference
Ground clearance61 cmReference
660 Serial Number Location
Bottom of dashboard below steering wheel.Reference
660 Serial Numbers
195973132Reference
196086166Reference
1961111213Reference
1962117873Reference
1963127356Reference
1964141160Reference
FAQ: How to read a serial number table.Reference
Test results
NTTL 541: gasoline 6-speed 2WDReference
NTTL 544: diesel 6-speed 2WDReference
Gasoline 6-speed 2WDMay 16 - 19, 1955Link: Nebraska Tractor Test 541 fileReference
Belt fuel use (max)11.7 l/hourReference
Drawbar performanceReference
Gear 4 used for power test.Reference
Max pull1954 kgReference
Gear 1 used for pull test.Reference
Diesel 6-speed 2WDMay 19 - 26, 1955Link: Nebraska Tractor Test 544 fileReference
Belt fuel use (max)9.1 l/hourReference
Max pull1992 kgReference
Speeds
With 9-38 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.