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Oliver OC-12 tractor photo
1955 - 1960 Agricultural Crawler tractor
1955 - 1960
Agricultural Crawler tractor
1955 - 1960
Agricultural Crawler tractor
1955 - 1960
Agricultural Crawler tractor
Tractor Tests
NTTL 548: gasoline 4-speed crawler
NTTL 549: diesel 4-speed crawler
Nebraska Tractor Test 548
OC-12 fuel use from test 548
OC-12 fuel use from test 548
OC-12 fuel use from test 548
OC-12 fuel use from test 548
Nebraska Tractor Test 548
Gasoline 4-speed crawler June 15 - 28, 1955 Link: Nebraska Tractor Test 548 file
Belt power (max)
57.93 hp 43.2 kW
Belt fuel use (max)
6.0 gal/hour 22.7 l/hour
Drawbar performance
Max power
50.83 hp 37.9 kW
Gear 2 used for power test.
Max pull
10399 lbs 4716 kg
Gear 1 used for pull test.
Nebraska Tractor Test 549
OC-12 fuel use from test 549
OC-12 fuel use from test 549
OC-12 fuel use from test 549
OC-12 fuel use from test 549
Nebraska Tractor Test 549
Diesel 4-speed crawler June 15 - 28, 1955 Link: Nebraska Tractor Test 549 file
Belt power (max)
56.55 hp 42.2 kW
Belt fuel use (max)
4.8 gal/hour 18.2 l/hour
Drawbar performance
Max power
50.54 hp 37.7 kW
Gear 2 used for power test.
Max pull
11333 lbs 5140 kg
Gear 1 used for pull test.

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