Sisu SA-150
| Sisu SA-150 | |
|---|---|
 |
|
| Overview | |
| Manufacturer | Oy Sisu-Auto Ab |
| Also called | Maasto-Sisu, ″Masi″ |
| Production | 1982–1991 |
| Assembly | Hämeenlinna and Karis, Finland |
| Designer | Seppo Kokkola, Kari Lindholm, Veli Vallinoja, Uoti Hartikainen, Kalevi Kakko |
| Body and chassis | |
| Class | medium size off-road lorry |
| Body style | platform lorry |
| Related | Sisu SA-240 |
| Powertrain | |
| Engine | 6-cyl. Valmet 611 CSBA |
| Transmission | 6-speed manual (ZF) and a 2-stage reduction gear |
| Dimensions | |
| Wheelbase | 3 850 mm |
| Length | 6 760 mm |
| Width | 2 480 mm |
| Height | 3 100 mm |
| Kerb weight | 7 600 kg |
| Chronology | |
| Predecessor | Sisu A-45 |
| Successor | Sisu SA-130 |
Sisu SA-150 is a medium-size, two-axle off-road lorry made by the Finnish heavy vehicle manufacturer Oy Sisu-Auto Ab from 1982 until 1991. The four-wheel-drive lorry with load capacity of 6 400 kg was developed for pulling of heavy cannons of the Finnish Defence Forces.
Based on experience from Sisu A-45 and due to new, heavier cannons, there came a need for stronger vehicles in the Finnish Defence Forces. Due to this, Sisu-Auto started a development project of an entirely new medium size off-road lorry.
The engineering work began in 1978 in the main office of Sisu-Auto located then in Fleming Street, Helsinki. The project manager was Seppo Kokkola, the head engineer of the company. The other members were Kari Lindholm, Veli Vallinoja, Uoti Hartikainen and Kalevi Kakko who were the most notable engineers of Sisu-Auto. The starting point was NATO compatibility, which can be seen for instance on the tyre size of 14.00-20 and the general looks of the vehicle. Building of the first prototype was started in November 1979 and the first test run was performed in the following February. In April the prototype was taken to Rovajärvi for field testing and in the following autumn began a half-year testing programme. The vehicle passed the tests of the Defence Forces.
The prototype was called SA-140. It was powered by a turbocharged Valmet 611 of which output was 140 kW. The top speed was 100 km/h and with the biggest gear ratio the top speed was 1.6 km/h. The vehicle was clearly larger and more powerful than A-45. Its kerb weight was nearly the same as the gross weight of A-45.
At its early development A-45 had been nicknamed ″Proto-Sisu″, referring to prototype, by the Finnish army officers. Obviously, Sisu-Auto did not like this name and named the vehicle Masi, which comes from Maasto-Sisu, ″Terrain Sisu″. Masi is also the Finnish name for Beetle Bailey.
The production model got a more powerful, 150 kW engine, and was therefore named SA-150. Serial production started in Sisu-Auto Hämeenlinna factory in 1982 and the first delivery lot of 10 vehicles was handed over to the Defence Forces in October the same year. Beginning from the following year the annual production was about 60 vehicles. Almost all vehicles were built in Hämeenlinna, only two small delivery lots at an early stage of the vehicles production cycle were made in Sisu's Karis factory.
In the production of SA-150 Sisu-Auto utilised many shared components of other Sisu models, in particular early XA-180 Pasi's.
The engine is water-cooled, turbocharged six-cylinder in-line Valmet 611 CSBA direct injection diesel of which output is 150 kW and maximum torque 680 Nm.
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Wikipedia