MBE 4000

Section 1.19 EGR Piston, Piston Ring, and Connecting Rod

Section 1.19
EGR Piston, Piston Ring, and Connecting Rod

The difference from the non-EGR engine cylinder liner to the EGR engine, is a groove on the top part of the cylinder liner, which houses the carbon scraper ring. The EGR engine uses a new tool for piston installation; however, all other procedures are the same for the EGR and non-EGR engine.‪

Section 1.19.1
Piston Removal for EGR Engine

Perform the following steps to remove the piston from an EGR engine:‪

NOTICE:

The carbon scraper ring has a smaller internal diameter than the piston skirt diameter; therefore, the piston installation and removal must be carried out with the carbon scraper ring removed.

Note: Piston removal in the EGR engine is performed with the engine facing upright – not turned on it's side.

  1. Remove the carbon scraper ring from the cylinder liner groove.
    Click to see this graphic in a separate window

     1. Cylinder Liner‪

     3. Installed Piston‪

     2. Carbon Scraper Ring‪

     4. Installed Carbon Scraper Ring‪

    Figure 1. Removing Carbon Scraper Ring

  2. Push the piston and connecting rod assembly out of the cylinder liner.
  3. Follow remaining steps for non-EGR engine piston removal. Refer to "1.18.1 Piston Removal" .

Section 1.19.2
Piston Installation for EGR Engine

Perform the following steps to install the piston in an EGR engine:‪

NOTICE:

The carbon scraper ring has a smaller internal diameter than the piston skirt diameter; therefore, the piston installation and removal must be carried out with the carbon scraper ring un-installed or removed.

Note: Piston installation in the EGR engine is performed with the engine facing upright – not turned on it's side.

  1. Install sleeve (J–47110) to the cylinder block. See Figure "Installation of Piston" .
    Click to see this graphic in a separate window

     1. Piston‪

    Figure 2. Installation of Piston

    Note: There are NO arrows on the top of the EGR piston to direct the installation. The piston can be installed in any direction and it will be correct.

  2. Push the piston into cylinder liner, using ring compressor (J-45983) to compress the piston rings.
  3. Clean the carbon scraper ring seat in the cylinder liner.
  4. After piston is installed, install carbon scraper ring in the cylinder liner groove. See Figure "Removing Carbon Scraper Ring" .
  5. Check carbon scraper ring for correct fit after installation.
  6. Follow remaining steps for piston installation in a non-EGR engine . Refer to "1.18.2 Piston Installation" step 9 .


MBE 4000 Service Manual - 6SE412
Generated on 10-13-2008

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