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MBE 4000 EPV (ELECTRONIC PROPORTIONAL VALVE) AND WABCO AIR SOLENOID VALVE

Listed in Table is each proportional valve listed and the component it activates. ‪

Proportional Valve ‪

Component ‪

PV1 ‪

Exhaust flap enable + EGRshutoff valve or boost control = wastegate valve (Turbobrake) ‪

PV2 ‪

EGRcontrol valve ‪

PV3 ‪

Fan ‪

PV4 ‪

Fan ‪

PV5 ‪

CTV(Constant Throttle Valve) ‪

PV6 ‪

Turbobrake sliding sleeve + EGRshutoff valve ‪

Proportional Valve Chart

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 EPVvalve 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 EPVvalve and turbo brake actuator. See Figure 44166 .

    1. EPV(Electronic Proportional Valve) ‪

    6. Large Hollow Screw ‪

    2. Wastegate ‪

    7. Small Hollow Screw ‪

    3. Electric Wiring Harness Terminals ‪

    8. EPVValve Inlet ‪

    4. Wabco Valve ‪

    9. EPVValve Outlet (hidden) ‪

    5. Solenoid Valve Mounting Bolts ‪

    10. EPVValve Mounting Bolts ‪

    Installing 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.

Installation of EPVValve and Wabco Air Solenoid Valve

Perform the following steps to install the EPVvalve, 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 Nm (74 lbft).
  2. Mount the Wabco solenoid valve on right side of bracket using two M8 x 50 mm bolts. Apply 25 Nm (19 lbft) tightening torque. See Figure 44166 .

    1. EPV(Electronic Proportional Valve) ‪

    6. Hollow Screw ‪

    2. Turbo Brake Actuator ‪

    7. Small Hollow Screw ‪

    3. Electric Wiring Harness Terminals ‪

    8. EPVValve Inlet ‪

    4. Wabco Valve ‪

    9. EPVValve Outlet (hidden) ‪

    5. Solenoid Valve Mounting Bolts ‪

    10. EPVValve Mounting Bolts ‪

    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 Nm (19 lbft) tightening torque.
  4. Install large hollow screw in threaded connection. Torque to 50 Nm (37 lbft). See Figure 44166 .

    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 Nm (11 lbft).

    NOTICE:

    Avoid friction on compressed air pipe traveling under the EPVvalve or potential damage to engine could result. ‪

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