Volvo BM / BM-Volvo T 800

Now the time had come to produce a really big tractor. The T 800, which replaced the BM 470 Bison, broke the 100 hk barrier with its six-cylinder Volvo D 50 engine.
Compared with the Bison this machine was a new design. The gearbox, with eight forward speeds and two reverse, divided into a high range and low range, was of a similar type to the gearbox in the T 400. The brakes were also of the same type as those of the T 400, with dry, enclosed disc brakes on the differential shafts. The independent power take-off for the new T 800 was designed on the same principles as on the Boxer, ie with a separate plate-type clutch. The same clutch was also used for the driving-wheel-dependent power take-off. As with the small tractor, a range of PTO speeds were available with the tractor stationary, and the direction of rotation could be reversed. The power-assisted steering made the tractor both easy and convenient to steer. The seat comfort was enhanced by applying scientific findings relating to suspension, damping and a choice of settings, as well as a soft upholstered top. The safety frame was of our own design, as well as the cab interior cladding of glass and sheet steel, a first step towards an in-house manufactured cab. A cab from an external manufacturer was available as an optional extra.

The T 800 was the first BM tractor with a dry air cleaner with paper filter, built-in cyclone pre-cleaner and pressure drop indicator, an alternator rated at no less than 475 W, cold starting operated electrically from the cab, and so on. It was also the first that could be supplied with proper front weights, ten at 47 kg (10 individual 47 kg weights). For markets that required a cab, there was a spacious, well-equipped steel cab. The industrial variant, the T 800 I, had nodular iron in the flywheel housing, rear axle casing and rear axle housing, industry-treaded tires and instead of the tubular axle on the agricultural machines, a steering axle from the two-wheel-drive loaders. Terra Trol Mark II, with major improvements, was introduced into production in February 1975. At the same time the cab was upgraded in various ways, including more headroom and greater glass area..

The new D 60 engine was introduced in the mid-1970s.