C15 and C18 On-Highway Engines Camshaft - Remove and Install Caterpillar


Camshaft - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
9U-7257  Cradle 
9U-7256  Guide 
9U-7225  Camshaft Pilot 
9U-7240  Camshaft Hook 
9U-7243  Alignment Sleeve 
8T-2998  Lubricant 
Loctite 242 Threadlocker Medium Strength, Blue 

Start By:

  1. Remove the camshaft gear.

  2. Remove the rocker arms and shafts.


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.



NOTICE

Do not turn the crankshaft or the camshaft while the camshaft gear is removed. If the front gear group is not correctly timed during installation, interference can occur between the pistons and the valves, resulting in damage to the engine.




    Illustration 1g01056681

  1. Remove bolts (2) and thrust plate (1).


    Illustration 2g01071487

  2. Remove sealing plate (3) from the front housing. Remove adapter assembly (4) from the crankshaft.


    Illustration 3g01056684

  3. Remove O-ring seal (5) and O-ring seal (6) from sealing plate (3).


    NOTICE

    Care must be used when removing or installing the camshaft. Do not damage the finished surfaces of the camshaft or the camshaft bearings.




    Illustration 4g01056704

  4. Use the bolts for the rocker arm shaft assembly to install Tooling (A) at Location (Y).


    Illustration 5g01047945

  5. Install Tooling (B) on front housing (7). Tooling (B) is used to support camshaft (8). Do not tighten the bolts for Tooling (B) at this time.


    Illustration 6g01056675

  6. Remove flat head screws (9) and cover (10). Remove the O-ring seal from the cover.


    Illustration 7g01047961


    Illustration 8g01047996

    Note: It is necessary to install Tooling (C) on the camshaft. Tooling (C) will support the rear of the camshaft as the camshaft is moved out of the cylinder head and into Tooling (B). Align camshaft (8) with the bore of Tooling (B). Tighten the bolts that hold Tooling (B) to front housing (7).

  7. Move camshaft (8) forward and install one Tooling (C) in the end of the camshaft. Again, move the camshaft forward and install remaining Tooling (C) into the back of first Tooling (C).

    Note: Avoid lifting the camshaft with Tooling (D). The camshaft should rest on Tooling (A). Lifting of the camshaft can cause misalignment as the camshaft is removed, resulting in damage to the camshaft bearings.

  8. Use Tooling (D) to move camshaft (8) toward the front of the engine. Reposition Tooling (D), as needed.

  9. Carefully slide the camshaft to the front of the engine for removal. Use two technicians to remove the camshaft. Keep the camshaft level while the camshaft is being removed from the cylinder head. The weight of the camshaft is approximately 39 kg (86 lb).

    Note: Rotate the camshaft during removal. This will prevent the camshaft from binding in the camshaft bearings.

  10. Remove Tooling (C) from the camshaft.

  11. Remove Tooling (B) from front housing (7).

  12. Remove Tooling (A) from the cylinder head.

Installation Procedure


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.



NOTICE

Do not turn the crankshaft or the camshaft while the camshaft gear is removed. If the front gear group is not correctly timed during installation, interference can occur between the pistons and the valves, resulting in damage to the engine.



NOTICE

Care must be used when removing or installing the camshaft. Do not damage the finished surfaces of the camshaft or the camshaft bearings.


  1. Ensure that the camshaft and camshaft bearings are thoroughly clean. Lubricate the camshaft lobes with a 50/50 mixture of Tooling (F) and clean engine oil. Apply a thin coat of clean engine oil on the camshaft bearings.


    Illustration 9g01056704

  2. Install Tooling (A) on the cylinder head at Location (Y).


    Illustration 10g01056901

  3. Install Tooling (B) on front housing (7). Do not tighten the bolts that hold Tooling (B) to front housing (7) at this time.

  4. Use Tooling (E) to align Tooling (B) with the camshaft bearings. Tighten the bolts that hold Tooling (B) to front housing (7). Remove Tooling (E).

    Note: Tooling (E) should move freely from the bore of Tooling (B).



    Illustration 11g01047961

  5. Install Tooling (C) on the rear of the camshaft.

  6. Use two technicians to install the camshaft. Use Tooling (D) to assist in aligning camshaft (8) with the camshaft bearings. Carefully slide the camshaft into the cylinder head from the front of the engine. Keep the camshaft level while the camshaft is being installed in the cylinder head. The weight of the camshaft is approximately 39 kg (86 lb).

    Note: Rotate the camshaft during installation. This will prevent the camshaft from binding in the camshaft bearings.

  7. Remove Tooling (C) and finish installing camshaft (8) in the bore.

    Note: Tooling (C) must be removed before the camshaft can be completely installed in the cylinder head.

  8. Remove Tooling (A) from the cylinder head.

  9. Remove Tooling (B) from the front housing.


    Illustration 12g01056675

  10. Install the O-ring seal on cover (10). Position the cover on the rear of the cylinder head. Install flat head screws (9) and tighten to a torque of 13 ± 3 N·m (10 ± 2 lb ft).


    Illustration 13g01056684

  11. Install O-ring seals (5) and (6) in sealing plate (3). Lubricate O-ring seal (6) with a 50/50 mixture of Tooling (F) and clean engine oil.


    Illustration 14g01056682


    Illustration 15g01056681

  12. Install sealing plate (3) in front housing (7). Install adapter assembly (4) in the sealing plate. Ensure that the dowel in adapter assembly (4) engages the hole in the camshaft.

  13. Install thrust plate (1) . Apply Tooling (G) to bolts (2). Hold the thrust plate in position and install bolts (2). Evenly tighten bolts (2) until sealing plate (3) and the O-ring seal are seated against the cylinder head.

    Note: Ensure that the O-ring seal stays in the groove in sealing plate (3).

End By:

  1. Install the rocker arms and shafts.

  2. Install the camshaft gear.

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