SEAL 2A3676 - Caterpillar

Personal injury can result from hot coolant, steam and alkali.At operating temperature, engine coolant is hot and under pressure. The radiator and all lines to heaters or the engine contain hot coolant or steam. Any contact can cause severe burns.Remove filler cap slowly to relieve pressure only when engine is stopped and radiator cap is cool enough to touch with your bare hand.Do not attempt to tighten hose connections when the coolant is hot, the hose can come off causing burns.Cooling System Conditioner contains alkali. Avoid contact with skin and eyes.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
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.
The cooling system coolant should be sampled and monitored with regular frequency. The samples should be analyzed per the following guidelines:
Level 1 analysis: Every 500 hours
Level 2 analysis: Every 6000 hoursNote: For cooling systems filled with Cat ELC ( Extended Life Coolant), only Level 2 sampling is required. All other coolants require Level 1 sampling.Note: A level 1 analysis may indicate the need for a Level 2 analysis.Note: A Level 2 analysis is required after 500 hours of operation following any of these changes:
The cooling system is new
The cooling system has been refilled
The cooling system has been converted to a new coolant
Illustration 1 g06242299The sampling valve is located near the engine oil filters.Obtain the sample of the coolant as close as possible to the recommended sampling interval. To receive the full effect of S O S analysis, establish a consistent trend of data. To establish a pertinent history of data, perform consistent samplings that are evenly spaced. Supplies for collecting samples can be obtained from your Cat dealer.Note: Operate the engine at low idle to warm the coolant. Keep the engine operating to obtain an accurate sample.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.
Obtain coolant samples directly from the coolant sample port. You should not obtain the samples from any other location.
Keep the lids on empty sampling bottles until you are ready to collect the sample.
Place the sample in the mailing tube immediately after obtaining the sample to avoid contamination.
Never collect samples from expansion bottles.
Never collect samples from the drain for a system.For additional information about coolant analysis, see