MBE 4000 – Section 7.6 EPV (Electronic Proportional Valve) and Wabco® Air Solenoid Valve

Section 7.6
EPV (Electronic Proportional Valve) and Wabco® Air Solenoid Valve

Listed in Table "Proportional Valve Chart" is each proportional valve listed and the component it activates.‪

Proportional Valve‪	Component‪
PV1‪	Exhaust flap enable + EGR shutoff valve or boost control = wastegate valve (Turbobrake)‪
PV2‪	EGR control valve‪
PV3‪	Fan‪
PV4‪	Fan‪
PV5‪	CTV (Constant Throttle Valve)‪
PV6‪	Turbobrake sliding sleeve + EGR shutoff valve‪

Section 7.6.1
Removal of EPV Valve and Wabco Air Solenoid Valve

Perform the following steps to remove the EPV valve, Wabco air solenoid valve and all the corresponding connections:‪

1. Disconnect wiring harness from the EPV valve and the Wabco solenoid valve.

   PERSONAL INJURY ‪
   To avoid injury from the sudden release of a high-pressure hose connection, wear a face shield or goggles.‪

2. Disconnect the compressed air pipe between inlet connection installed at EPV valve and turbo brake actuator. See Figure "Removing the EPV Valve / Wabco Solenoid Valve" .
   

   1. EPV (Electronic Proportional Valve)‪	6. Large Hollow Screw‪
   2. Wastegate‪	7. Small Hollow Screw‪
   3. Electric Wiring Harness Terminals‪	8. EPV Valve Inlet‪
   4. Wabco Valve‪	9. EPV Valve Outlet (hidden)‪
   5. Solenoid Valve Mounting Bolts‪	10. EPV Valve Mounting Bolts‪

   Figure 1. Removing the EPV Valve / Wabco Solenoid Valve

3. Remove the smaller hollow screw below the larger hollow screw.
4. Disconnect the inlet and outlet connections at EPV pressure regulating valve.
5. Remove the large hollow screw in threaded connection.
6. Remove the two M8 x 50 mm bolts that hold the EPV valve on the left side of bracket.
7. Remove the two M8 x 50 mm bolts that hold the Wabco solenoid valve on the right side of bracket.
8. Remove the two M14 x 25 mm bolts that hold the EPV/solenoid valve bracket to the block.

Section 7.6.2
Installation of EPV Valve and Wabco Air Solenoid Valve

Perform the following steps to install the EPV valve, Wabco air solenoid valve and all corresponding connections:‪

1. Install the EPV/solenoid valve bracket to the block with two M14 x 25 mm bolts. Torque to 100 N·m (74 lb·ft).
2. Mount the Wabco solenoid valve on right side of bracket using two M8 x 50 mm bolts. Apply 25 N·m (18 lb·ft) tightening torque. See Figure "Installing the EPV Valve / Wabco Solenoid Valve" .
   

   1. EPV (Electronic Proportional Valve)‪	6. Hollow Screw‪
   2. Turbo Brake Actuator‪	7. Small Hollow Screw‪
   3. Electric Wiring Harness Terminals‪	8. EPV Valve Inlet‪
   4. Wabco Valve‪	9. EPV Valve Outlet (hidden)‪
   5. Solenoid Valve Mounting Bolts‪	10. EPV Valve Mounting Bolts‪

   Figure 2. Installing the EPV Valve / Wabco Solenoid Valve

3. Mount the EPV valve on left side of bracket using two M8 x 50 mm bolts. Torque to 25 N·m (18 lb·ft) tightening torque.
4. Install large hollow screw in threaded connection. Torque to 50 N·m (37 lb·ft). See Figure "Installing the EPV Valve / Wabco Solenoid Valve" .

   PERSONAL INJURY ‪
   To avoid injury from the sudden release of a high-pressure hose connection, wear a face shield or goggles.‪

5. Install inlet and outlet connections at EPV pressure regulating valve. Torque to 15 N·m (11 lb·ft).

   NOTICE:
   Avoid friction on compressed air pipe traveling under the EPV valve or potential damage to engine could result.‪

6. Install smaller hollow screw below larger hollow screw, securing connection. Torque to 15 N·m (11 lb·ft).
7. Fit the pipe between inlet connection installed at EPV valve and turbo brake actuator.
8. Connect wiring harness to EPV valve and Wabco valve.