OM 2012
(3) Ai!cPf th-,
d system to d!-r;in compfetk!y .
t\!CTE:
Ce sure the drain valves do net plug-up during draining,
.
(4) When the &stem is completely drained,
close a!! dmin vafves except .&en drain-
ing for storage.
F- Cooling System C Iconing
.
Drain end thoroughly flush the cooJ!ng system twice a year or mere often if necessary.
The appearance of rust in the rudiator, or in the coo!c;nt is an indication that the
inhibItor has become weakened and it is possible that some sludge bus cccumulated
in the system. When this condit.ion exists, proceed as foI!ows:
(I) fun the enginc until .it reaches nprmal opercting temperature; then stop the
engine and drain the cooling system (Ref. Para. 7, E).
(2) Fiji the coo!ing system with clean coojunt (Ref. Pora. 7,’ 6).
(3) Add a flushing compound, that is compatible with aluminum, to the cooling
system in accordance with the instructions furnished with the compound.
(4) Start the engine and flush the system as directed by the instructions furnished
with the compound.
(5) After the system has been flushed and thorotighly cleaned of the compound,
refill with clean coolant (Ref. Para. 7, 1-i).
G. Radiator Ccre Cleaning
Blow out insects and dirt from the radiator core air passages, using air or water
under pressure.
Engine overheating is often caused by bent or clogged radiutor
fins. When straightening bent fins,
be careful not to injure the tubes or to break
the bond between the fins and tubes.
J-I* Cooling Sysiem Filling
2-1
Add a cooling system corrosion inhibitor (for warm weather operation) or permanent
antifreeze (when the air temperatures expected ure at freezing, +32 deg F or lower).
Antifreeze may be premixed if desired.
Cooling system capacity is approximately
9-l/2 gaJionS.
-
Page 76,
AJJ, 2545
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