Peterbilt Medium Duty Trucks Operator's Manual after 1-07
Peterbilt Medium Duty Trucks Operator's Manual after 1-07
Peterbilt Medium Duty Trucks Operator's Manual after 1-07
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Preventive Maintenance<br />
Engine Cooling System<br />
Desired ELC/<br />
Water ratio:<br />
0% 10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 100%<br />
Freeze point<br />
°F (°C)<br />
+32<br />
(0)<br />
+25<br />
(-4)<br />
+20<br />
(-7)<br />
+15<br />
(-9)<br />
+10<br />
(-12)<br />
+5<br />
(-15)<br />
-5<br />
(-21)<br />
-12<br />
(-24)<br />
-23<br />
(-31)<br />
-34<br />
(-37)<br />
-50<br />
(-46)<br />
-65<br />
(-54)<br />
-75<br />
(-59)<br />
-84<br />
(-64)<br />
-70<br />
(-57)<br />
-55<br />
(-48)<br />
-43<br />
(-42)<br />
-30<br />
(-34)<br />
-5<br />
(-21)<br />
ELC Condition (Contamination and Inhibitor Concentration)<br />
Perform a visual inspection of the ELC. It should have no<br />
cloudiness or floating debris. Determine the chemical<br />
inhibitor concentration level by using an ELC-specific test<br />
kit or test strips. Inhibitor concentration level determines<br />
corrosion protection. If you are concerned about possible<br />
coolant quality, contamination, or mechanical problems,<br />
submit a coolant sample for analysis. Improper maintenance<br />
may cause coolant degradation and could result in<br />
damage to the cooling system and engine components.<br />
Consult your dealer or the ELC manufacturer’s representative<br />
for recommended ELC test kits, test strips, and laboratory<br />
sample procedures.<br />
ELC Extender<br />
Add ELC extender if necessary at the maintenance interval<br />
under “Cooling” on page 148.<br />
Topping Off<br />
WARNING! Removing the fill cap on a hot<br />
engine can cause scalding coolant to spray<br />
out and burn you badly. If the engine has been<br />
in operation within the previous 30 minutes,<br />
be very careful in removing the fill cap. Protect<br />
face, hands, and arms against escaping<br />
fluid and steam by covering the cap with a<br />
large, thick rag. Do not try to remove it until<br />
the surge tank cools down if you see any<br />
steam or coolant escaping. In any situation,<br />
remove the cap very slowly and carefully. Be<br />
ready to back off if any steam or coolant<br />
begins to escape.<br />
<strong>Medium</strong> <strong>Duty</strong> (R10/06) Y53-6008 – 145 –