3Com SEBU6251-06 Coolant Recommendations, Extended Life Coolant (ELC)

26

Maintenance Section

Cooling System Specifications

Table 11

Propylene Glycol

Concentration	Freeze	Anti-Boil
	Protection	Protection
50 Percent	−29 ￿C (−20 ￿F)	106 ￿C (223 ￿F)

To check the concentration of glycol, use the

1U-7298Coolant/Battery Tester (Celsius) or use the 1U-7297Coolant/Battery Tester (Fahrenheit). The testers give readings that are immediate and accurate. The testers can be used with ethylene or propylene glycol.

i01096597

Coolant Recommendations

SMCS Code: 1350; 1352; 1395

The following two coolants are used in Caterpillar diesel engines:

Preferred – Caterpillar Extended Life Coolant (ELC) or a commercial extended life coolant that meets the Caterpillar EC-1 specification

Acceptable – A Caterpillar Diesel Engine Antifreeze/Coolant (DEAC) or a commercial heavy-duty coolant/antifreeze that meets “ASTM D4985” or “ASTM D5345” specifications

NOTICE

Do not use a commercial coolant/antifreeze that only meets the ASTM D3306 or D4656 specification. This type of coolant/antifreeze is made for light duty automotive applications.

Caterpillar recommends a 1:1 mixture of water and glycol. This mixture of water and glycol will provide optimum heavy-duty performance as a coolant/antifreeze.

Note: Caterpillar DEAC DOES NOT require a treatment with an SCA at the initial fill. Commercial heavy-duty coolant/antifreeze that meets “ASTM D4985” or “ASTM D5345” specifications MAY require a treatment with an SCA at the initial fill. Read the label or the instructions that are provided by the OEM of the product.

In stationary engine applications and marine engine applications that do not require anti-boil protection or freeze protection, a mixture of SCA and water is acceptable. Caterpillar recommends a six percent to eight percent concentration of SCA in those cooling systems. Distilled water or deionized water is preferred. Water which has the recommended properties may be used.

NOTICE

All Caterpillar diesel engines equipped with air-to-air aftercooling (ATAAC) require a minimum of 30 percent glycol to prevent water pump cavitation.

Table 12

Coolant Service Life

Coolant Type		Service Life
Caterpillar ELC	6000	Service Hours or
		Six Years
Caterpillar DEAC	3000	Service Hours or
		Three Years
Commercial Heavy-Duty	3000	Service Hours or
Coolant/Antifreeze that
		Two Years
meets “ASTM D5345”
Commercial Heavy-Duty	3000	Service Hours or
Coolant/Antifreeze that
		One Year
meets “ASTM D4985”
Caterpillar SCA and	3000	Service Hours or
Water		Two Years
Commercial SCA and	3000 Service Hours or
Water		One Year

i01096605

Extended Life Coolant (ELC)

SMCS Code: 1350; 1352; 1395

Caterpillar provides Extended Life Coolant (ELC) for use in the following applications:

•Heavy-duty spark ignited gas engines

•Heavy-duty diesel engines

•Automotive applications

The anti-corrosion package for Caterpillar ELC is different from the anti-corrosion package for other coolants. Caterpillar ELC is an ethylene glycol base coolant. However, Caterpillar ELC contains organic corrosion inhibitors and antifoam agents with low amounts of nitrite. Caterpillar ELC has been formulated with the correct amount of these additives in order to provide superior corrosion protection for all metals in engine cooling systems.

ELC extends the service life of the coolant to 6000 service hours or six years. ELC does not require a frequent addition of a Supplemental Coolant Additive (SCA). An Extender is the only additional maintenance that is needed at 3000 service hours or one half of the ELC service life.