VALVE - EGR AIR FLOW CONTROL
DESCRIPTION
| EGR AND AIR CONTROL VALVE |
| 1 - REAR OF INTAKE MANIFOLD |
4 - EGR VALVE COOLER |
| 2 - AIR INLET ELBOW |
5 - EGR VALVE |
| 3 - EGR AIR CONTROL VALVE |
6 - ENGINE |
The EGR air flow control valve is located between the incoming charge air and the intake manifold. It is used to increase the EGR flow rate at low engine loads. The valve is never totally closed, but the valve position depends on the exhaust gas quantity that needs to be recirculated with in the emission target .
OPERATION
| EGR AND AIR CONTROL VALVE |
| 1 - REAR OF INTAKE MANIFOLD |
4 - EGR VALVE COOLER |
| 2 - AIR INLET ELBOW |
5 - EGR VALVE |
| 3 - EGR AIR CONTROL VALVE |
6 - ENGINE |
The EGR air flow control valve is a pluse width modulated control valve that is operated by the ECM in line with the EGR flow quantity required to remain inside the emissions target.
REMOVAL
1. Disconnect the negative battery cable.
2. Disconnect the EGR air control valve (3) wiring harness connector.
3. Disconnect the charge air inlet hose.
4. Remove the generator to intake manifold support bracket.
5. Separate the oil level indicator tube and the vacuum pipe from the air control valve.
6. Disconnect the EGR tube connected to the back of the air control valve.
7. Remove the air control valve fasteners and the control valve assembly.
INSTALLATION
1. Clean all gasket mating surfaces.
2. Install the gasket (4), seal (2) and the air control valve (3). Tighten the air control valve fasteners to 10.8 N·m (95 in. lbs.).
3. Install the EGR tube to the back of the air control valve.
4. Connect the vacuum pipe and oil level indicator tube to the air control valve.
5. Install the generator to intake support bracket. Tighten fasteners to 32.4 N·m (24 ft. lbs.).
6. Install the charge air hose. Tighten clamp to 7 N·m (61 in. lbs.).
7. Connect the wiring harness connector.
8. Connect the negative battery cable.