APRILIA SR MAX 300 i.e. Manual page 51

Check coolant when the engine is cold as indicated in the scheduled maintenance
table, following the steps below.
a) Place the scooter in a vertical position on the stand.
b) Remove the expansion tank cover «A», turning in anticlockwise.
c) Look inside the expansion tank: reference «C» shows the adequate coolant level.
d) If the coolant level is below reference «C», proceed to top-up when the engine is
cold.
If the coolant needs to be topped up frequently or the expansion tank is completely
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dry, check the cooling system to find the cause of the problem. It is therefore essential
to have the cooling system checked at an Authorised Service Centre. Replace cool-
ant as indicated in the scheduled maintenance table. Take your vehicle to an
Authorised Service Centre for this operation.
NOTE
SHOULD THE 9th SEGMENT OF THE COOLANT TEMPERATURE INDICATOR
COME ON DURING A NON-DEMANDING RIDE, SHUT OFF THE ENGINE AND LET
IT COOL DOWN. THEN CHECK THE COOLANT LEVEL; IF THE LEVEL IS OK,
CONTACT AN AUTHORISED SERVICE CENTRE.
WARNING
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TO AVOID THE RISK OF SCALDING, DO NOT UNSCREW THE EXPANSION
TANK COVER WHILE THE ENGINE IS STILL HOT.
WARNING
TO PREVENT AVOID HARMFUL FLUID LEAKAGE WHILE RIDING, ENSURE
THAT THE LEVEL NEVER EXCEEDS THE MAXIMUM VALUE.
TO ENSURE CORRECT ENGINE OPERATION, KEEP THE RADIATOR GRILLE
CLEAN.
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