988G Wheel Loader Machine Systems Caterpillar


Maintenance Free Linkage Seals - Install

Usage:

988G 2TW

Installation Procedure

Note: The following tables list the tools that are needed to install maintenance free linkage seals.

Table 1
Tools Needed For Pins with a Diameter of 180 mm (7.1 inch) 
Qty  Part Number  Description 
155-5516  Installer Ring 
155-5517  Plunger 

Table 2
Tools Needed For Pins with a Diameter of 160 mm (6.3 inch) 
Qty  Part Number  Description 
173-6747  Installer Ring 
173-6748  Plunger 

Table 3
Tools Needed For Pins with a Diameter of 140 mm (5.5 inch) 
Qty  Part Number  Description 
156-1639  Installer Ring 
156-1643  Plunger 

Table 4
Tools Needed For Pins with a Diameter of 120 mm (4.7 inch) 
Qty  Part Number  Description 
173-6745  Installer Ring 
173-6746  Plunger 


Illustration 1g00363278
Installer Ring


Illustration 2g00363455
Plunger


    Illustration 3g00680803
    (1) Compression ring. (2) Seal. (3) Installer ring. (4) Installer ring with seal and compression ring.

    Note: It is important to follow the correct procedure for installing maintenance free linkage seals. Many seal failures are the direct result of mistakes during the assembly and during the installation of the seal components.

  1. Use the correct tooling to assemble seal (2) and compression ring (1).


    Illustration 4g00338312

  2. Install seal (2) into installer ring (3).

    Note: The lip of seal (2) should be facing downward onto installer ring (3). See Illustration 3.

  3. Submerge compression ring (1) in oil. Use 8T-9582 SAE 80W90 Oil to lubricate the assembly.


    Illustration 5g00363457

  4. Install compression ring (1) on seal (2) that is located in installer ring (3).

    Note: The compression ring (1) cannot be inserted upside-down. Resistance will be encountered if the compression ring is installed upside-down.



    Illustration 6g00338472
    Installer ring with seal and compression ring


    Illustration 7g00337372

    Note: The maintenance free linkage seal will remain in the installer ring when the seal assembly is assembled correctly.

  5. Position the installer ring and seal (4) over plunger (5).


    Illustration 8g00338532
    Correct assembly of installer ring and plunger (6).


    Illustration 9g00337414

  6. Insert the installer ring and plunger (6) into the bore of collar (7). The fit will be loose as the plunger acts as a guide to ensure proper alignment.


    Illustration 10g00681919

  7. Evenly apply pressure around the edges of plunger (5) until the seal is inserted into the groove of collar (7).

  8. Remove the installer ring and plunger (6) from collar (7).


    Illustration 11g01044342
    Correct seal assembly installation in collar (7).


    Illustration 12g01044219
    Section A of Illustration 11
    (1) Compression ring. (2) Seal. (7) Collar.

    Note: A properly installed seal will remain in the seal groove of the collar.

  9. Repeat this procedure for any other Maintenance Free Linkage Seals.

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