MAINTENANCE The answer represents the additional units required to precharge the cooling system. Four bottles of powder, part number DCA95, will provide a sufficient amount of SCA units (80) to precharge the example cooling system. Install the appropriate service filter at the next and subsequent maintenance intervals. NOTE 3 - Change the coolant filter at every engine oil and filter change interval to protect the cooling system. Maintain a nominal SCA concentration of 1.0 unit per 3.8 3.8 S gal) indicates an under-concentrated coolant solution. More than 2.0 units per 3.8 an over-concentrated coolant solution. To check the SCA concentration level, use coolant test kit, CC-2626.
Instructions are included with the test kit. Cooling System Test Kit The following cooling system test kit may be purchased from your Komatsu America International Company distributor. This Fleetguard® coolant test kit, part number CC-2626 is used to check the concentration of coolant additives in the cooling system. 1. Test strip bottles 2. Solution #1 bottle 3. Small plastic container 4. Large plastic cup 5.
Syringe WA450-3MC 3-16 SCA Unit Concentration Guide Number of Solution A Drops to Cause Color Change Coolant Condition Action Required 0 - 10 Drops Extremely under-concentrated - less than 0.4 SCA units per 3.8 (1 US gal) Initially charge the system to a minimum of 1.0 SCA unit per 3.8 11 - 16 Drops Marginally under-concentrated - 0.45 to 0.8 SCA units per 3.8 US gal) Add SCA liquid units to maintain 1.0 SCA unit per 3.8 minimum or change the DCA 4 coolant filter. 17 - 25 Drops Acceptable - 0.85 to 1.3 SCA units per 3.8 None. 26 - 35 Drops Highly acceptable - 1.35 to 2.0 SCA units per 3.8 None.
36 - 55 Drops Marginally over-concentrated - 2.1 to 3.3 SCA units per 3.8 gal) Review maintenance practice. Over 55 Drops Extremely over-concentrated Drain 50 percent of the coolant and replace with water antifreeze mixture. Retest the system for correct SCA unit concentration.