Section 11.3 Malfunctioning Air Intake (Grid) Preheater

Section 11.3
Malfunctioning Air Intake (Grid) Preheater

To determine if a malfunctioning air intake (grid) preheater is causing the excessive white smoke, perform the following steps:‪

  1. Check the operation of the air intake (grid) preheater. Refer to "75 SPN 729 - Grid Heater Not Operating Normally" .
    1. If heater operates correctly; check for a defective fuel pump. Refer to "11.4 Defective Fuel Pump" .
    2. If heater does not operate correctly, replace air intake (grid) preheater, refer to MBE 4000 Service Manual (6SE420), Chapter 6, “Air Intake System — Air Intake Elbow and Grid Heater”.
  2. Verify replacing the air intake (grid) preheater resolved the excessive white smoke condition; refer to "11.3.1 Test the Engine with Replaced Air Intake (Grid) Preheater" .

Section 11.3.1
Test the Engine with Replaced Air Intake (Grid) Preheater

Perform the following to determine if replacing the air intake (grid) preheater corrected the excessive white 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 the engine.
  2. Run the engine speed to full load.
  3. Visually inspect the exhaust for excessive white smoke.
    1. If the engine exhaust emission appears normal, no further troubleshooting is required. Shut down the engine.
    2. If the engine exhaust emission is excessive, shut down the engine, check for a defective fuel pump. refer to "11.4 Defective Fuel Pump" .


EPA07 MBE 4000 DDEC VI Troubleshooting Guide - 6SE568
Generated on 10-13-2008

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