MBE 900 DDEC VI Troubleshooting – Section 9.11 Faulty Exhaust Brake Valve

Section 9.11
Faulty Exhaust Brake Valve

To determine if a faulty exhaust brake valve is causing excessive black or gray smoke, check exhaust brake valve for freedom of movement.‪

  1. If movement is not free, replace exhaust brake valve; refer to MBE 900 Service Manual (6SE9007), exhaust system chapter. Verify replacement of the exhaust brake valve; refer to "9.11.1 Test Engine for Replaced Exhaust Brake Valve" .
  2. If movement is free, check the exhaust brake cylinder; refer to "9.12 Faulty Exhaust Brake Cylinder" .

Section 9.11.1
Test Engine for Replaced Exhaust Brake Valve

Perform the following steps to determine if the replaced exhaust brake valve resolved the excessive exhaust smoke condition:‪

warning

PERSONAL INJURY

To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked.‪

  1. Start and run the engine.
  2. Run the engine at idle under no-load conditions for approximately five minutes, allowing the engine coolant to reach normal operating range, approximately 70-95°C (158-203°F).
  3. Visually inspect exhaust for excessive smoke.
    1. If the engine smoke emission appears normal, no further troubleshooting is required. Shut down the engine.
    2. If the engine exhaust smoke is excessively black or gray, shut down the engine. Check the exhaust brake cylinder; refer to "9.12 Faulty Exhaust Brake Cylinder" .


EPA07 MBE 900 DDEC VI Troubleshooting Guide - 6SE580
Generated on 10-13-2008

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