TM 5-3805-263-14&P-3
Cooling System
CAUTION
Whenever draining and refilling the cooling system,
Never add coolant to an overheated engine; allow
always recheck the coolant level when the engine
the engine to cool first.
reaches normal operating temperature.
Check specific gravity of antifreeze solution
Filling at over 19 liters (5 U.S. gallons) per minute can
frequently in cold weather to assure adequate
cause air pockets in the cooling system.
protection.
Premix the antifreeze solution to provide protection to the
When permanent antifreeze and water solutions are
lowest expected ambient temperature. Pure undiluted
used in the cooling system, the solution should be
antifreeze will freeze at -23C (-100F).
drained and replaced "Every 2000 Service Hours or 1
Year."
Operate with a thermostat in the cooling system all year-
round. Cooling system problems can arise without a
However, when cooling system conditioner is added
thermostat.
to the cooling system "Every 250 Service Hours," it
is not necessary to change the antifreeze yearly.
Electrical
The antifreeze change period can be extended to
"4000 Services Hours or 2 Years."
CAUTION
When using jumper cables, be sure to connect in
parallel: POSITIVE (+) to POSITIVE (+) and
Do not use liquid conditioner and the conditioner
NEGATIVE (-) to NEGATIVE (-).
element in the cooling system at the same time.
When using external electrical source to start the
The cooling system should contain a 3%
machine, turn disconnect switch off and remove the
concentration of cooling system conditioner, or
key before attaching the jumper cables.
equivalent, at all times regardless of concentration
of antifreeze.
Hydraulic
Do not use cooling system conditioner or the
CAUTION
coolant conditioner element with the Dowtherm 209
Make-up oil added to the hydraulic system must mix
Full-Fill coolant.
with the oil already in the tank. Use only petroleum
products unless the system is equipped for use with
If the machine is to be stored in, or shipped to, an area
special products.
with below freezing temperatures; the cooling system
must either be protected to the lowest expected ambient
Water or air can cause pump failure. If the hydraulic
temperature, or drained completely.
oil becomes cloudy, then water or air is entering the
system. Drain fluid, retighten hydraulic suction line
The engine cooling system is protected to -29C (-200F),
clamps, purge and refill the system.
with permanent-type anti- freeze,
Use clean water that is low in scale forming minerals, not
softened water. Add cooling system conditioner to the
water to provide corrosion protection.
Follow the
recommendations on the container for the quantity
required.
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