| NOTICE |
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Always use a designated pump for oil sampling, and use a separate designated pump for coolant sampling. Using the same pump for both types of samples may contaminate the samples that are being drawn. This contaminate may cause a false analysis and an incorrect interpretation that could lead to concerns by both dealers and customers. |
Recommended Interval for S·O·S Coolant Sample
| Recommended Interval | ||
| Type of Coolant | Level I | Level II |
| DEAC | Every PM Level 1 | Yearly |
| ELC | Not Required | Yearly |
Perform a coolant analysis (Level II) at 500 service hours for new systems or for converted systems that use ELC or use DEAC. This 500 hour check will also check for any residual cleaner that may have contaminated the system.
S·O·S Coolant Analysis (Level 1)
A coolant analysis (Level I) is a test of the properties of the coolant.
The following properties of the coolant are tested:
- Glycol Concentration for freeze protection
- Ability to protect from erosion and corrosion
- pH
- Conductivity
- Water hardness
- Visual analysis
- Odor analysis
The results are reported, and appropriate recommendations are made.
S·O·S Coolant Analysis (Level 2)
Level 2 coolant analysis is a comprehensive chemical evaluation of the coolant. This analysis is also a check of the overall condition of the inside of the cooling system.
The S·O·S Coolant Analysis has the following four features:
- Full analysis of Level 1
- Identification of the source of metal corrosion and of contaminants
- Identification of buildup of the impurities that cause corrosion
- Identification of buildup of the impurities that cause scaling
- Determination of possible electrolysis within the machines' cooling system
The results are reported, and appropriate recommendations are made.
For more information on S·O·S Coolant Analysis, consult your Caterpillar dealer.