Pressurized System: Hot coolant can cause seri-
ous burns. To open the cooling system filler cap,
stop the engine and wait until the cooling system
components are cool. Loosen the cooling system
pressure cap slowly in order to relieve the
pressure.
1.
Remove the cooling system filler cap slowly in
order to relieve pressure.
2.
Maintain the coolant level within 13 mm (0.5 inch)
of the bottom of the filler pipe. If the engine is
equipped with a sight glass, maintain the coolant
level to the proper level in the sight glass.
Illustration 42
g00103639
Typical filler cap gaskets
3.
Clean the cooling system filler cap and check the
condition of the filler cap gaskets. Replace the
cooling system filler cap if the filler cap gaskets are
damaged. Reinstall the cooling system filler cap.
4.
Inspect the cooling system for leaks.
i04035949
Cooling System Coolant
Sample (Level 1) - Obtain
SMCS Code:
1350-008; 1395-008; 1395-554; 7542
Note: Obtaining a Coolant Sample (Level 1) is
optional if the cooling system is filled with Cat
ELC (Extended Life Coolant).
Cooling systems
filled with Cat ELC should have a Coolant Sample
(Level 2) that is obtained at the recommended
interval as stated in the maintenance interval
schedule.
Note: Obtain a Coolant Sample (Level 1) if the
cooling system is filled with any other coolant
instead of Cat ELC including the following
coolants:
• Commercial long life coolants that meet the
Caterpillar Engine Coolant Specification -1
(Caterpillar EC-1)
• Cat DEAC (Diesel Engine Antifreeze/Coolant)
• Commercial heavy-duty coolant/antifreeze
Table 30
Recommended Interval
Type of Coolant
Level 1
Level 2
Cat DEAC
Every 250 service
hours
Every year
Conventional heavy
duty-coolant
Commercial coolant
that meets the re-
quirements of the
Caterpillar EC-1
standard
Cat ELC or conven-
tional EC-1 coolant
Optional
Every year
(1)
The Level 2 Coolant Analysis should be performed sooner if a
problem is suspected or identified.
NOTICE
Always use a designated pump for oil sampling, and
use a separate designated pump for coolant sam-
pling. Using the same pump for both types of sam-
ples may contaminate the samples that are being
drawn. This contaminate may cause a false analysis
and an incorrect interpretation that could lead to con-
cerns by both dealers and customers.
Note: Level 1 results may indicate a need for
Level 2 Analysis.
Obtain the sample of the coolant as close as possible
to the recommended sampling interval. In order to
receive the full effect of S·O·S analysis, establish a
consistent trend of data. In order to establish a
pertinent history of data, perform consistent
samplings that are evenly spaced. Supplies for
collecting samples can be obtained from your
Caterpillar dealer.
Use the following guidelines for proper sampling of
the coolant:
• Complete the information on the label for the
sampling bottle before you begin to take the
samples.
• Keep the unused sampling bottles stored in plastic
bags.
SEBU8312-03
63
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