Husqvarna SM 610 2006 Workshop Manual page 206

E N G IN E C O O L IN G S Y S T E M
T able of C ontents
C h e ck in g th e c o o lin g flu id le ve l
C o o lin g syste m
E n g in e co o lin g system o ve rh au lin g
2
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N .2
N .4
N .6
C h eckin g th e c o o lin g flu id le ve l
C ooling fluid absorbs the heat fro m the therm ic group (piston,
cylinder, head ) a nd conve ys it to the exte rior atm o sphere thro ugh
radiator.
F or a correct ope ration of the cooling s ystem it is of utm ost
im portance the p eriodical check of fluid level.
th erm ic m a ss a n d rad ian t m ass co u ld cau s e
o verh ea tin g o f th e c ylin d er-p isto n ass em b ly w ith
co n se q u e n t s eizu re an d , th e w o rst, d am a g es to th e
cran ksh aft asse m b ly.
T he coolant (2 ) m ust be flush w ith the lo w er side of the filling
pipe union. T he level inside the expansion tank m ust never
be under the M IN (1) (page N .3).
H o w ever if engin e overheating is noticed, check that radiator
is com pletely filled up. C heck the electric fan (3) o perates
properly (tha t is that the electric fan rem oves the w arm air fro m
the radiator). C h eck of radiator le vel m ust be perfo rm ed w ith
cold engine (see page D .15 ). If for an y reason you have to
operate o n a hot engine, take care to slow ly discharge pressure.
T he radiato r cap is provided of tw o unlocking positions, the first
being for the p re vious pressure discharge.
d irectio n s c o u ld cau s e scald s to th e o p erato r
an d o th er p eo p le aro u n d .
C o o lin g s ys te m
T he cooling s ystem is of the force d circulation type , w ith centrifu-
gal
pum p located on the L.H . side, at the c ylinder head, double heat
exchange r w ith vertical flow , the rm ostat and electric blow er.
T he opening of the therm ostat h a ppens w hen the tem peratu re of
the cooling liquid reaches about 7 5°C (16 7°F ); at this point the
liquid passes in the heat e xchang ers and, if the te m peratu re of
90°C (1 94°F ) is reached, the electric blow er is also actuated. an
expansion tank c onnected to the heat exchan ger the recovery of
the excess cooling liquid. F urther, a vent pipe on th e cooling
liquid
pum p cover, is connected to the tw o heat e xchang ers.
T h e lac k o f th e h eat ex ch a n g e m ean s (w ater) b etw een
O p e n in g th e circu it w ith o u t takin g care o f a b o ve