Sisu K-138SV

The register lists 5 versions here with a 6.54-litre six-cylinder engine, outputs from 99.3 to 99.5 kW, kerb weights from 4,310 to 6,300 kg, gross vehicle weights from 12,500 to 15,000 kg, and lengths from 6,650 to 7,450 mm with widths from 2,350 to 2,500 mm.

In this medium-heavy weight class, the K-138SV was sought after in Finland as a chassis for construction and municipal work as well as timber haulage, a market segment where Sisu has traditionally held its own niche in its home market alongside international makes such as Scania, Volvo and MAN.

For a used example, check the chassis and axles for corrosion and wear, clutch and gearbox condition, air brake system operation, and the tightness of hydraulics and fittings from the respective body builder; parts run through Sisu and Finnish commercial workshops.

With gross vehicle weights from 12,500 to 15,000 kg, these chassis belong to EU class N3 (over 12 t); operating them requires a category CE driving licence, a tachograph and compliance with driving and rest times. For timber haulage and construction work on unstable ground, a robust leaf-spring suspension on the rear axle was usually used, unlike the air suspension on vehicles for purely long-haul transport.