STEMME S12, Maintenance Manual

Page: 64 / 290

DOCUMENT NUMBER:
L500-912.820 ISSUE JUL 20, 2016
AMENDMENT: 00
DATE: --
CHAPTER- PAGE 3-30
MAINTENANCE MANUAL STEMME S12
3.4.14.2 COOLANT FLUID
Mixture of 50% concentrated antifreeze agent with anti-corrosion additives and 50% water.
Freezing point of this mixture is about -38°C / -34°F. »BASF Glysantin Antikorrosion« has proved
to be good; this or equivalent coolant may be used.
WARNING
As the cooling system is pressurized, to avoid the risk of scalding by escaping hot coolant, do not
open the locking cap on the coolant expansion tank unless the engine is cold (or barely lukewarm).
NOTICE
Waterless coolant is not approved for operation.
CAUTION
Check of the coolant fluid: The quantity in the overflow container (lower left side in the landing
gear bay) must be between “min.” and “max.” markings. Missing coolant in the overflow con-
tainer must be added.
CAUTION
If the level of coolant in the overflow container is below “min.” marking, proper supply to the
breather valve and coolant tank is not assured and air may have been introduced into the cooling
system. To check , confirm that the engine is cold, open the locking cap on the expansion tank
(left side on fire-wall in engine compartment), and add coolant if necessary.
NOTICE
If the engine is warm, the indicated quantity in the overflow container is noticeably higher. An
excessive coolant level in the overflow container will not result in engine damage, but will result
in overflow of coolant into the landing gear bay.