3508C, 3512C and 3516C Marine Engines Electronic Unit Injector - Install Caterpillar


Electronic Unit Injector - Install
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1.1. Installation Procedure

Installation Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
9U-6862  Tapered Brush 
4C-5027  Tap Wrench 
4C-6774  Vacuum Gun Kit 
452-6011  Multipurpose Grease 


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.




    Illustration 1g01130613

  1. Use Tooling (B) to clean the bore for the electronic unit injector in the cylinder head. Hold Tooling (B) with Tooling (C). Rotate Tooling (B) against Surface (X) of the bore. Continue cleaning until Surface (X) is smooth and shiny.

  2. Use Tooling (D) to remove the fuel from the cylinder. Evacuate as much fuel as possible from the cylinder before installing the electronic unit injector. Several evacuations may be necessary.


    Illustration 2g01130615

  3. Install O-ring seal (6) and O-ring seal (7) on the electronic unit injector.

  4. Apply Tooling (E) to the bore of the cylinder head for the electronic unit injector.


    NOTICE

    When an electronic unit injector is replaced, the new electronic injector code must be programmed into the engine's personality module software by using the calibration menu on the Electronic Service Tool. If the new electronic injector code is not entered, the characteristics of the previous electronic unit injector is assumed.

    If it is not possible to immediately reprogram the electronic injector code into the personality module software, the engine will not be severely harmed. The new electronic injector code should be reprogrammed as quickly as possible in order to optimize engine performance.


  5. Position electronic unit injector (5) into the original location in the cylinder head. Center the solenoid between the valve springs. Press the electronic unit injector into the cylinder head. Do not strike the electronic unit injector.


    Illustration 3g01130566

  6. Install plug (4) in the cylinder head.

  7. Install electronic unit injector clamp (3) and bolt (1). Tighten bolt (1) in order to seat electronic unit injector (5) in the cylinder head. Do not strike the electronic unit injector. Tighten bolt (1) to a torque of 65 ± 7 N·m (48 ± 5 lb ft).

  8. Connect harness assembly (2). Tighten the terminal nuts to a torque of 2.5 ± 0.25 N·m (22 ± 2 lb in).

End By:

  1. Install the rocker shaft assembly. Refer to Disassembly and Assembly, "Rocker Shaft and Pushrod - Install".

Information System:

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