Sisu M-Series History
Catalog record
This is a brief catalog introduction with limited source documentation. A licensed, identity-checked lead photograph has not yet been added for this page. Detailed year, configuration and ownership coverage must be identified separately; this page is not a complete vehicle catalog.
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Model history available. Detailed year guides are not published for this model.
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Introduced in 1970 alongside the conventional-cab R-series, the M-series was Sisu's forward-control offering of the decade, providing better cab-over-engine access and payload flexibility. Four chassis layouts were offered — 4×2, 6×2, 6×4, and the unusual 8×2 — reflecting the diverse demands of Finnish forestry, construction, and long-haul haulage.
The M-series adopted the Vanaja lifting tandem axle system, a mechanism that allowed rearmost axles to be raised when running unladen to reduce tyre wear and fuel consumption — particularly valuable on Finland's long, sparsely populated roads. The last M-series units were produced in 1984, at which point the modular S-series (introduced 1980) had taken over as the primary product line.
Body styles
- Forward control
- Tipper
- Tanker
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