1985 Volvo BM Valmet 405

1985 Volvo BM Valmet 305 and 405

When Scantrac, the combined marketing company of Volvo BM and Valmet, began marketing the products of its parent companies outside of Finland in the early 1980s, the four-wheel-drive Valmet 604-4 model proved to be very popular. The 604-4 was the successor to the lightweight Valmet 502 and 602 models. Despite its popularity, a specific target of criticism was its 6+2R transmission, which was considered to be outdated.

The Valmet factory in Tourula, Jyväskylä, began developing a new 8+4R transmission immediately once the 05 Series models 505–905 had reached production. The new transmission was ideal. All gears were synchronised, and the helically cut gears ensured both durability and low noise. In addition, the transmission featured pressurised lubrication.

The gears for the transmission used for larger models were manufactured by Volvo BM, so when the Swedish partner took the strategic decision to discontinue the production of tractor parts, Valmet had to think of a new solution. The answer came from its sister factory in Brazil. At the time the Brazilian Government was providing export grants to domestic companies, so the new transmission presented a win-win situation for Valmet in Finland and Valmet do Brasil. The country’s best suppliers, such as ZF, were used when preparing for production. The transmission was then successfully tested in Finland. Only one prejudice remained: could Brazilian quality be trusted? This scepticism proved to be unfounded. The quality of the new transmission exceeded all expectations.

The engine plant in Linnavuori modernised the 2.7-litre Valmet 310B engine, in part by adding a turbocharger, thus creating the TD 27 model. Two power outputs were offered: 53 horsepower for the Volvo BM Valmet 305 model and 61 horsepower for the Volvo BM Valmet 405 model. The centre frame was made out of steel and served as the fuel tank. It was also given the same shape as on larger models, thus protecting the four-wheel-drive mechanism’s Cardan axle. ZF was chosen for the driven axle, achieving a slewing angle of 50 degrees. This made the tractor extremely agile.

The cab was based for the most part on the previous 604 model. A brand-new rounded cab with frameless glass doors was developed at the same time, but the compa­ny’s sales organisation considered these “helicopter cabs” to be too advanced – which was a mistake. The hydraulics were also based on previous models.

The new models were launched in June 1985 in Suolahti. The reception was very positive. The products were presented under the Volvo BM Valmet brand, as Volvo BM continued to supply certain parts for the rear axle, for example. The 305 and 405 would be the last models with the twin designation, as the following year the name of all models was simplified to Valmet.

These models have an extremely good reputation and are highly valued to this day. Salesmen say that whenever these models are traded in, they can find a buyer for them immediately.

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Valtra A Series (previously 305/405)

The Volvo BM Valmet 305-4/405-4 was an excellent general-use tractor. Depending on the tyre specifications, the tractor weighed 3,200-3,300 kilos. The transmission featured 8+4R fully synchronised gears, and a creeper gear was also available, making for 12+8R gears

The Volvo BM Valmet 305-4/405-4 was an excellent general-use tractor. Depending on the tyre specifications, the tractor weighed 3,200-3,300 kilos. The transmission featured 8+4R fully synchronised gears, and a creeper gear was also available, making for 12+8R gears.

Volvo BM Valmet 405

Volvo BM Valmet 405.