Northern Lights and NL1066H3, Руководство оператора

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ONL2-2 7/13
28
Servicing
2. Vapor bubbles
(Figure 28-C)
are formed when the
piston's impact causes the liner walls to vibrate,
sending pressure waves into the coolant.
3. These tiny vapor bubbles collect on the surface
of metal parts. As the bubbles collapse (pop) a
microscopic piece of metal is eroded from the
metal part. Over a period of time, this pitting may
progress completely through the cylinder liner of a
wet-sleeve, heavy-duty diesel engine. This allows
coolant to enter the combustion chamber. Engine
failure or other serious damage will result.
A - Cylinder Liner Walls B - Engine Coolant C - Vapor Bubbles
Figure 28
4. Unprotected engines with low quality water as cool-
ant can have liner failure in as few as 500 hours.
WATER QUALITY
1. Distilled, deionized, soft water is preferred for use in
cooling systems. Bottled distilled water from a food
store or water supplier is recommended. Tap water
often has a high mineral content. Tap water should
NEVER
be put in a cooling system unless fi rst tested
by a water quality laboratory. Do not use water
made by the reverse osmosis method unless it has
been PH neutralized.
2. Here are acceptable water quality specifi cations:
Parts Grains
Contaminates per Million per Gallon
Maximum Chlorides 40 2.5
Maximum Sulfates 100 5.9
Maximum Dissolved Solids 340 20.0
Maximum Total Hardness 170 10.0
PH Level 5.5 to 9.0
3. If chlorides, sulfates or total dissolved solids are
higher than the above given specifi cation, the
water must be distilled, demineralized, or
deionized before it is used in a cooling system.
4. If total hardness is higher than 170 ppm and all
other parameters are within the given
specifi cations, the water must be softened before it
is used to make coolant solution.
EGC: ETHYLENE GLYCOL CONCENTRATE
(ANTIFREEZE)
EGC (Antifreeze) is fl ammable. Keep it away
from any open fl ame. Avoid contact with eyes.
Avoid contact with skin. Do not take internally.
In case of contact, immediately wash skin with
soap and water. For eyes, fl ush with large
amounts of water for at least 15 minutes. Call a
physician. KEEP OUT OF REACH OF CHIL-
DREN. Follow all warnings on the container.
1. Ethylene glycol coolant concentrate is commonly
mixed with water to produce an engine coolant
with a low freeze point and high boiling point.
2. A low silicate form of ethylene glycol coolant is
recommended for all diesel engines.
3. Use an ethylene glycol coolant concentrate
meeting ASTM D6210, D5345, D4985,
SAEJ1941, General Motors Performance
Specifi cation GM1899M, or formulated to
GM6038M. Do not use ASTM D3306 or D4656.
4. This product is concentrated and should be mixed
to the following specifi cation.
5. If additional coolant solution needs to be added
to the engine due to leaks or loss, the glycol
concentration should be checked with a
hydrometer to assure that the desired freeze point
is maintained.
Distilled EGC % Freeze Boiling
Water % Antifreeze Point Point
Optimum 50% 50%
-37°C +109°C
-34°F +226°F
Minimum 60% 40%
-24°C +106°C
-12°F +222°F
Maximum 40% 60%
-52°C +111°C
-62°F +232°F
revised 2-23-12