STG global TANVAC HDV3000, Руководство оператора

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NOTICE
Never add coolant to an overheated engine. Engine
damage could result. Allow the engine to cool first.
NOTICE
If the engine is to be stored in, or shipped to an area
with below freezing temperatures, the cooling system
must be either protected to the lowest outside tem-
perature or drained completely to prevent damage.
NOTICE
Frequently check the specific gravity of the coolant
for proper freeze protection or for anti-boil protection.
Clean the cooling system for the following reasons:
• Contamination of the cooling system
• Overheating of the engine
• Foaming of the coolant
Note:
Air pockets can form in the cooling system if
the cooling system is filled at a rate that is greater
than 5 L (1.3 US gal) per minute.
After you drain the cooling system and after you refill
the cooling system, operate the engine. Operate the
engine without the filler cap until the coolant reaches
normal operating temperature and the coolant level
stabilizes. Ensure that the coolant is maintained to
the proper level.
NOTICE
Never operate an engine without water temperature
regulators in the cooling system. Water temperature
regulators help to maintain the engine coolant at the
proper operating temperature. Cooling system prob-
lems can develop without water temperature
regulators.
Refer to Special Instruction, SEBD0518, “Know Your
Cooling System” and Special Instruction, SEBD0970,
“Coolant and Your Engine” for more detailed
information.
Many engine failures are related to the cooling
system. The following problems are related to cooling
system failures: overheating, leakage of the water
pump, plugged radiators or heat exchangers and
pitting of the cylinder liners.
These failures can be avoided with proper cooling
system maintenance. Cooling system maintenance is
as important as maintenance of the fuel system and
the lubrication system. Quality of the coolant is as
important as the quality of the fuel and the lubricating
oil.
Coolant is normally composed of three elements:
water, additives and glycol.
Water
NOTICE
Never use water alone without Supplemental Coolant
Additives (SCA) or without inhibited coolant. Water
alone is corrosive at engine operating temperatures.
Water alone does not provide adequate protection
against boiling or freezing.
Water is used in the cooling system in order to
transfer heat.
Distilled water or deionized water is
recommended for use in engine cooling systems.
DO NOT use the following types of water in cooling
systems: hard water, softened water that has been
conditioned with salt and sea water.
If distilled water or deionized water is not available,
use water with the properties that are listed in Table
20 .
Table 20
Caterpillar Minimum Acceptable Water Requirements
Property
Maximum Limit ASTM Test
Chloride (Cl)
40 mg/L
(2.4 grains/US gal)
“D512”,
“D4327”
Sulfate (SO
4
)
100 mg/L
(5.9 grains/US gal)
“D516”
Total Hardness
170 mg/L
(10 grains/US gal)
“D1126”
Total Solids
340 mg/L (20 grain/US gal)
“D1888”
Acidity pH of 5.5 to 9.0
“D1293”
For a water analysis, consult one of the following
sources:
• Caterpillar dealer
• Local water utility company
• Agricultural agent
• Independent laboratory
Additives
Additives help to protect the metal surfaces of the
cooling system. A lack of coolant additives or
insufficient amounts of additives enable the following
conditions to occur:
• Corrosion
• Formation of mineral deposits
• Rust
• Scale
SEBU8312-03 47
Maintenance Section
Refill Capacities and Recommendations