Production series Sisu S-321

sisu s-322 bus 1934. @ stage degree of locally produced components high.

both high tolls , transportation costs pushed sat start domestic sourcing. third production batch included parts made such finnish companies keskusvalimo, suomen gummitehdas, pietarsaaren konepaja , kone ja silta. 5 vehicles of fourth production batch equipped frames produced crichton-vulcan. sixth series got finnish-made radiators produced oksanen & kumpp., hub caps lohmann, headlight brackets teräskalustaja, rear axle housing karhulan tehtaat, radiator caps metalli-niklaus , electric cables suomen kaapelitehdas. in cases sat had go volvo parts; example domestically produced track rods turned out weak. first karhula-produced axle housings did not fulfill requirements problems resolved after. of imported parts substituted own component production; fuel tanks example.

the weakening of finnish mark against swedish crown made importing increasingly unfavourable, forcing sat focus more on local sourcing activities. designing of upgraded models s-341 , s-342 had begun in 1933 introduced in 1934. content of domestic parts increased, still powered volvo delivered penta eb engines. both models available single or double rear wheels. interesting, new variant kv means kevyt versio, light version . delivered without bonnet , wings diy customers.

volvo supplied sat until autumn 1935; last delivered components timken axles , ross steering boxes. last s-341 , s-342 models powered domestically made olympia engines, later used in following sisu so-series.

the total amount of sisu s volvo parts reached 200 vehicles of 70 first units practically built on volvo chassis , additional 12 units largely based on volvo components.