2003/05/12 New Front Crankshaft Seals and New Rear Crankshaft Seals are Now in Production {1160, 1161} Caterpillar


New Front Crankshaft Seals and New Rear Crankshaft Seals are Now in Production {1160, 1161}
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2003/05/12 [SEPD0682]
BASIC ENGINE
CRANKSHAFT GP
2003/05/12 New Front Crankshaft Seals and New Rear Crankshaft Seals are Now in Production {1160, 1161}
Machine Engines:
  • 3406
  • 3408
  • 3412
  • 3456
  • C-15
  • C-16
  • Service Magazine SEPD0682, 12 May 2003, "New Front Crankshaft Seals and New Rear Crankshaft Seals are Now in Production". Disregard this article. See the article that follows.

    Description of Change: A new front crankshaft seal and a new rear crankshaft seal are now in production. Production for both seals started 9January 2003. These new seals are for the front and rear sealing journals of the crankshaft. The new seals incorporate a one piece seal/wear sleeve combination. The new crankshaft seals have a redesigned wear sleeve that has a flanged face. This new flanged face rotates with the crankshaft in order to keep dirt away from the sealing lip. This will provide better control of contaminants.

    The removal procedure for the new seals has been changed, from the former seal design because of the new flanged face on the wear sleeve. The seal face is blocked or hidden by the new flanged face on the wear sleeve. Refer to the section "Removal Procedure" and table 2 for the required removal tools. The assembly procedure for the new seals has not changed from the former seal design. Refer to section "Installation Procedure" and table 3 for the required tools for assembly.

    Adaptable To: The new crankshaft front seal and the new rear seal is adaptable to the above Machine Engines: 3406, 3408, 3412, 3456, C15 and C16. The new crankshaft seals are a direct replacement for the former seals. Refer to table 1 below for the new part numbers and the former part numbers.

    Table 1
    Parts List    
    Item     Qty     New Part Number     Description     Former Part Numbers    
    1     1     142-5867     Front Crankshaft Seal     2W-1733, 4P-2733, or 187-8953    
    1     1     142-5868     Rear Crankshaft Seal     2W-1734, 101-1716, or 130-8107    

    Removal Procedure

    Use the same removal procedure for the front and rear seals.

    ReferenceSee table 2 and illustration 1.

    Table 2
    Required Tools    
    Tool     Part Number     Part Description     Qty    
    A     1U-7600     Slide Hammer Puller     1    



      Illustration 1g00997360

      New seal

      (1) Seal

      (2) Wear sleeve

      (3) Wear sleeve flange

    1. Use a hammer and a punch in order to puncture 3 or more holes into the wear sleeve (2) on the flange side of the wear sleeve (3). Use Tool (A) to remove the wear sleeve (2) .

    1. Use a punch or Tool (A) to puncture a hole in seal (1). Use Tool (A) to remove seal (1) .

    Installation Procedure

    ReferenceSee table 3 and illustrations 2, 3, and 4.

    Table 3
    Required Tools    
    Tool     Part Number     Part Description     Qty    
    A     5P-1733     Seal Locator     1    
    5P-7301 Seal Locator (1)     1    
    B     5P-1737     Bolts     3    
    5P-7310 Bolts (1)     3    
    C     9S-8858     Nut (Seal Installer)     1    
    D     6V-6142     Front Seal Installer     1    
    E     6V-6143     Rear Seal Installer     1    
    8T-2683 Rear Seal Installer (1)     1    
    ( 1 ) Required tool for engines with rear gear train


    NOTICE

    Keep all parts clean from contaminants.

    Contaminants may cause rapid wear and shortened component life.


    Note: The seal and the wear sleeve must be replaced at the same time. Once the seal and the wear sleeve are separated, these components cannot be used again. Refer to Special Instruction, SMHS8508, "Special Handling Information and Installation Instructions for Crankshaft Seal Groups That Have Hydrodynamic Grooves In the Sealing Lip" before the seal is serviced.

      Note: Do not use any type of lubricant during the installation of the crankshaft seal and the wear sleeve.


      NOTICE

      The front and rear seals and wear sleeves have different spiral grooves in the seal. Because of this type of design, the front seal group for an engine is different from the rear seal group. If a seal group is installed on the wrong end of the engine, oil can actually be taken out of the engine instead of moving oil back into the engine.





      Illustration 2g00515623

      Crankshaft seal installation

      Note: Install the seal with the directional arrow outward in order to show the direction of the crankshaft rotation.

    1. Before installation of the crankshaft seal and the wear sleeve, inspect the crankshaft for scratches. Also, inspect the crankshaft for any distortion on the surface that may lead to an out of round condition. Use a polishing cloth in order to remove any imperfections on the crankshaft.

    1. Use 4C-9500 Quick Cure Primer to clean the outside diameter of the crankshaft.

      Note: The new seal comes with the retaining compound that is already applied to the inside diameter of the wear sleeve.




      Illustration 3g00997376

      New seal

      (1) Seal

      (2) Wear sleeve




      Illustration 4g00997146

      Typical example

    1. Fasten Tool (A) to the crankshaft with Tool (B) .

    1. Position wear sleeve (2) and seal (1) on Tool (A). Install Tool (D) for the front seal, or Tool (E) for the rear seal, onto Tool (A) . Lubricate the face of the washer on Tool (C). Install Tool (C) on Tool (A) .

    1. Tighten Tool (C) until Tool (D) or Tool (E) contacts Tool (A) .

    1. Remove Tool (C) and then remove either Tool (D) or Tool (E). Remove Tools (A) and (B). Check the crankshaft seal and the wear sleeve for the correct installation.

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