Classic Machines: Oliver's OC-18 tractor

In its heyday, the Oliver Corporation of Cleveland Ohio, USA was a well-respected company manufacturing agricultural tractors and implements. By Richard Campbell.
Looking to expand its marketplace options beyond agricultural wheel tractors, it acquired the Cletrac Tractor Co, also of Cleveland Ohio, in 1944.
Cletrac had fallen on hard times during WWII, being one of the few tractor manufacturers not to be given large war contracts for the production of machinery, so the sale to Oliver was very timely and prevented the company going into bankruptcy.
Background
Cletrac had a long history dating back to 1916, and was one of the pioneers of the track type tractor industry.
In fact Cletrac was the first company to manufacture a “hi-drive” (elevated sprocket) track type tractor on a production basis, its Model F, which was produced from 1920 to 1922, pre-dating the Caterpillar D10 by 57 years!
The Model F was a small crawler tractor strictly speaking only suitable for agriculture and weighed around 900 kilograms, but could pull a 3-bottom plow with no trouble.
One of the hallmarks of Cletrac tractors was their reliability, especially final drives.
This was due to the way the track frames were mounted to the chassis by way of a dead shaft.
Using this method, no impact shocks were transferred through to the final drives.
It also allowed a higher than usual amount of ground clearance, making Cletrac machines especially popular with logging and forestry contractors as they could pass over stumps and brush that could potentially bring other tractors to a very sudden stop!
Other track tractor manufacturers took a long time to duplicate this method of undercarriage attachment with the first to successfully adopt it being Euclid in the mid-1950s.
From 1936 until the Oliver buy out, Cletrac used an alphabetical system to identify individual models within its product range, eg, Model BD, Model DG, Model AG etc.
When Oliver took over the Cletrac tractor range it consisted of some 12 different models, some gasoline powered, the others diesel.
Oliver kept the Cletrac name, marketing them as Oliver-Cletrac so as not confuse the buying public and it was business as usual.
In 1949, it was decided by Oliver management, to add some clearer structure to the model numbering system, better reflecting the sizes of machines offered.
The Cletrac name was dropped altogether and a new machine identification system “OC” (Oliver-Cletrac) prefixed all the track type tractors.
With this system in place, machine models included the OC-3, OC-4, OC-9, OC-12, OC-15 and our subject this month, the OC-18.
Oliver as a company did not expend great amounts of research and development money on its OC track tractor range.
This was unfortunate as ‘resting on its laurels’ allowed other manufacturers to get the jump on it.
Sales started to decline as the existing machines were being surpassed by better technology.
Things came to a crunch in 1960 when Oliver was bought by the White Motor Corporation.
White continued to operate Oliver as a going concern but was also reluctant to spend the large volumes of cash required to update the Oliver track type tractor range.
The end result was that in 1965, production of all Oliver track type tractors was discontinued, the company preferring to concentrate on agricultural wheel tractors.
The Oliver OC-18 described
The Oliver OC-18 was the largest track type tractor that Oliver ever produced and sat between D7 and D8 size in the track tractor world.
Some 800 were manufactured between 1951 and 1959.
It had originally started out as the Model FDE in 1945 but was extensively redesigned by Oliver engineers and re-emerged as the Model OC-18 in 1951.
Oliver used a Hercules model DXFE diesel engine in the OC-18.
This engine was a 6-cylinder inline diesel putting out 161 flywheel..
To read the rest of this profile click here: contractormag....
Brief specifications - Oliver OC-18
Engine: Hercules DFXE, inline 6-cylinder, naturally aspirated, rated at 161 flywheel horsepower at 1500 rpm
Clutch: 15″ double-plate, overcentre
Transmission: Constant mesh manual, 4-speeds forward, 2 reverse
Top speed: 5.45mph
Steering: Differential type, air assisted
Brakes: Contracting band
Track gauge: 78″
Tracks: 35-section
Rollers: 6 bottom and 2 carrier per side
Standard shoes: 26″
Length: 14′ (bare)
Width: 8′ 6″ (bare)
Height: 6′ 10″ (bare)
Operating weight: 16 tons (bare)

[@lewiemcneely9143]

Ah HAH! This is the one! Very good, Lads! Also the music! And I don't see why the operator was down in the mouth. Maybe a day or two on a shovel or a scraper would change his mood. Thanks again, Lads!

[@NZContractormagazine]

Maybe he's been on a double barrel corn popper one day too many!

[@lewiemcneely9143]

That'd do it or a Euc pan on a long haul. Killed either way PLUS being deafened!