GENERAL COOLANT SPECIFICATIONS In tropical climates where antifreeze availability may be Maintenance of Cooling System Inhibitors limited, use a corrosion inhibitor DCA4, to protect the engine cooling system. Keeping the engine coolant properly inhibited will keep INHIBITORS/CONDITIONERS corrosion. the engine and radiator free of rust, scale deposits and 1. All cooling system inhibitors, including those in New machines are delivered with antifreeze protection. antifreeze solutions, become depleted through Service at regular scheduled intervals specified in the normal operation.
If the inhibitors in antifreeze are OPERATION & MAINTENANCE MANUAL with a service allowed to become depleted, the antifreeze becomes DCA4 filter. corrosive and attacks and coats the metallic surfaces of the cooling system which reduces heat transfer. Each time the coolant is drained and replaced, the Cooling system conditioners which contain these coolant must be recharged with DCA4. New coolant can inhibitors must be added to maintain corrosion be correctly charged with supplemental coolant additives protection. by using DCA4 filters or DCA4 concentrate listed in the 2. Soluble oil is not recommended for use in this engine as its use will reduce heat transfer.
If coolant is added between drain intervals, additional table entitled, DCA4 Unit Guide. DCA4 will be required. 3. There are no miracle additives that will increase heat transfer or prevent overheating. Conditioned water is Coolant Testing for Conditioner Concentration still the best coolant. 4. DCA4 is recommended to inhibit corrosion in the recommended, the conditioner concentration should be cooling system for the following reasons: satisfactory. The DCA4 concentration must not fall below When the cooling system is maintained as 1.0 unit per 3.8 R (1 US gal) or exceed 2 units per 3.8 R (1 ! Improved compatibility with high silicate US gal) of coolant.
The only accurate method for testing antifreezes to minimize hydro-gel formation if chemical concentrations in coolant with mixed chemical over concentration occurs. compounds is a laboratory analysis. For this reason, the ! Provides engine protection in the following areas: OPERATION & MAINTENANCE MANUAL. - Solder corrosion/bloom - Copper corrosion/erosion/stress cracking Inadequate concentration of the coolant additive - Oil fouling can result in major corrosive damage to cooling - Cylinder liner cavitation corrosion system components.
Over concentration can cause - Aluminum cavitation corrosion formation of gel that can cause restriction, plugging of - Seal and gasket degradation passages and overheating. coolant inhibitor should be maintained as shown in the 01-11 Approximate Freezing Point Percentage of Antifreeze Concentration by Volume Specific Gravity at 16EC (60EF) 0EC (+32EF) -7EC (+20EF) -12EC (+10EF) -18EC (0EF) -23EC (-10EF) -29EC (-20EF) -34EC (-30EF) -40EC (-40EF) -46EC (-50EF) -51EC (-60EF) -57EC (-70EF) -62EC (-80EF) -68EC (-90EF) -69EC (-92EF) 0 15 25 33 40 45 48 53 56 59 62 65 67 68 1.000 1.025 1.040 1.053 1.062 1.070 1.074 1.080 1.083 1.088 1.092 1.095 1.097 1.098