SCR Coolant Circuit Flow Test Tier 4 Final – AE Training

Objective Understand when the test must be run Understand the tools Test conditions Test operation

Coolant System Design QSB6.7

Coolant System Design QSB6.7

Scope Tier 4 Final (AEB24.60, 24.61, 24.62) SCR Components requiring coolant Dosing Module (DM) DEF Tank

Tools Two Flow Measuring Devices accurate for the +/-5% over the targeted flow range. Pressure Sensor + Restriction Curves OR Flow Meters Calterm (or voltage source to actuate coolant valve) Data logger for temperature and flow/pressure

Test Setup

Test Conditions Speed: Highest normal operating speed, up to 2100RPM Engine Conditions: If your machine will incorporate a TK by-pass, ensure that you are testing with the this component enabled. All OEM accessories using engine coolant should be flowing coolant when performing this test.

Pass/Fail Criteria *Max done with thermostat closed *Min done with thermostat open

Data Capture

Things to note If your machine will incorporate a TK by-pass, ensure that you are testing with the this component enabled. All OEM accessories using engine coolant should be flowing coolant when performing this test.

Example – QSB6.7 Power Unit Line lengths are shorter than Cummins Pre-engineered system Test setup for this installation

Opening Coolant Valve Test Condition Use Calterm Parameter Overrides O_UTC_TankHeater1_Enbl = 1, Reset to 0 after test O_UTC_TankHeater1_Val = 100 %, Reset to 0 after test OR apply the appropriate voltage to valve to actuate it (12V or 24V)

Conclusion Data collection Pass/Fail Flow rates for: 2 Conditions DM Engine Supply DEF Tank Header 2 Conditions Open Thermostat Closed Thermostat Pass/Fail Compare data to that found in the AEB Re-design as necessary