C6.6 Engines for Caterpillar Built Machines Camshaft Gear - Remove and Install Caterpillar


Camshaft Gear - 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 
A(1)  9U-6198  Crankshaft Turning Tool 
A(2)  9U-7336  Housing 
5P-7305 Engine Turning Tool 
230-6284  Timing Pin (Camshaft) 
136-4632  Timing Pin (Crankshaft) 
268-1966 Adapter 
(1) The Crankshaft Turning Tool is used on the front pulley.
(2) This Tool is used in the aperture for the electric starting motor.

Start By:

  1. Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install".

  2. Remove the front cover. Refer to Disassembly and Assembly, "Front Cover - Remove and Install".

Note: Either Tooling (A) can be used. Use the Tooling that is most suitable.


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.



NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Dispose of all fluids according to local regulations and mandates.


  1. Use Tooling (A) in order to rotate the crankshaft so that number one piston is at top dead center on the compression stroke. Refer to System Operation, Testing and Adjusting, "Finding Top Centre Position for No.1 Piston".


    Illustration 1g01340534

  2. Install Tooling (B) through hole (X) in camshaft gear (1) into the front housing. Use Tooling (B) in order to lock the camshaft in the correct position.


    Illustration 2g01335380

  3. Remove plug (4) from the cylinder block. Install Tooling (C) into hole (Y) in the cylinder block. Use Tooling (C) in order to lock the crankshaft in the correct position.

    Note: Do not use excessive force to install Tooling (C). Do not use Tooling (C) to hold the crankshaft during repairs.



    Illustration 3g01340536

  4. Loosen nuts (6) on all rocker arms (7). Unscrew adjusters (5) on all rocker arms (7) until all valves are fully closed.

    Note: Failure to ensure that all adjusters are fully unscrewed can result in contact between the valves and pistons.



    Illustration 4g01340551
    Alignment of timing marks

  5. Mark gears (1) and (8) in order to show alignment. Refer to Illustration 4.

    Note: Identification will ensure that the gears can be installed in the original alignment.



    Illustration 5g01340554

  6. Remove Tooling (B). Remove bolt (3) and washer (2) from camshaft gear (1).

  7. Remove camshaft gear (1) from the camshaft.

    Note: If the camshaft gear is a tight fit on the nose of the camshaft, use a prybar in order to remove the camshaft gear.

  8. If necessary, remove the key from the nose of the camshaft.

Installation Procedure

Table 2
Required Tools 
Tool  Part Number  Part Name  Qty 
230-6284  Timing Pin (Camshaft) 
136-4632  Timing Pin (Crankshaft) 
268-1966 Adapter 


NOTICE

Keep all parts clean from contaminants.

Contaminants may cause rapid wear and shortened component life.


  1. Ensure that number one piston is at top dead center on the compression stroke. Refer to System Operation, Testing and Adjusting, "Finding Top Center for No. 1 Piston".


    Illustration 6g01335380

  2. Ensure that Tooling (C) is installed in hole (Y) in the cylinder block. Use Tooling (C) in order to lock the crankshaft in the correct position. Refer to System Operation, Testing and Adjusting, "Finding Top Centre Position for No.1 Piston".

  3. Ensure that the camshaft gear and the key are clean and free from wear or damage.

  4. If necessary, install the key into the nose of the camshaft.

    Note: Ensure that the key is squarely seated.



    Illustration 7g01340534


    Illustration 8g01340551
    Alignment of timing marks

  5. Align the keyway in camshaft gear (1) with the key in the camshaft. Install camshaft gear onto the camshaft. Ensure that the timing marks on gears (1) and (8) are in alignment and that the mesh of the gears is correct. Refer to Illustration 8.


    Illustration 9g01340554

  6. Install Tooling (B) through hole (X) in the camshaft gear into the front housing. Install washer (2) and bolt (3) to camshaft gear (1).

  7. Remove Tooling (B) and (C). Install plug (4) into hole (Y) in the cylinder block. Refer to Illustration 6.

  8. Tighten bolt (3) to a torque of 95 N·m (70 lb ft).


    Illustration 10g01335426

  9. Ensure that the backlash for gears (1) and (8) is within specified values. Refer to Specifications, "Gear Group (Front)" for further information.

  10. Ensure that the end play for camshaft gear (1) is within specified values. Refer to Specifications, "Camshaft" for further information.

  11. Lubricate the teeth of the gears with clean engine oil.

  12. Adjust the valve lash. Refer to System Operation, Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust".

End By:

  1. Install the front cover. Refer to Disassembly and Assembly, "Front Cover - Remove and Install".

  2. Install the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install".

Information System:

C6.6 Engines for Caterpillar Built Machines Camshaft - Remove and Install
C6.6 Engines for Caterpillar Built Machines Lifter Group - Remove and Install
C6.6 Engines for Caterpillar Built Machines Cylinder Head - Install
C6.6 Engines for Caterpillar Built Machines Cylinder Head - Remove
C6.6 Engines for Caterpillar Built Machines Rocker Shaft and Pushrod - Install
C6.6 Engines for Caterpillar Built Machines Rocker Shaft - Assemble
C6.6 Engines for Caterpillar Built Machines Rocker Shaft - Disassemble
C6.6 Engines for Caterpillar Built Machines Rocker Shaft and Pushrod - Remove
C6.6 Engines for Caterpillar Built Machines Valve Mechanism Cover Base - Remove and Install
C6.6 Engines for Caterpillar Built Machines Valve Mechanism Cover - Remove and Install
C6.6 Engines for Caterpillar Built Machines Valve Mechanism Cover Base - Remove and Install - Composite Valve Mechanism Cover Base
C6.6 Engines for Caterpillar Built Machines Valve Mechanism Cover - Remove and Install - Composite Valve Mechanism Cover
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C6.6 Engines for Caterpillar Built Machines Engine Oil Pan - Remove - Cast Iron Oil Pan
C6.6 Engines for Caterpillar Built Machines Engine Oil Pan - Remove - Aluminum Oil Pan
C6.6 Engines for Caterpillar Built Machines Engine Oil Pan - Install - Aluminum Oil Pan
C6.6 Engines for Caterpillar Built Machines Engine Oil Pan - Install - Cast Iron Oil Pan
C6.6 Engines for Caterpillar Built Machines Engine Oil Pan Plate - Remove and Install - Aluminum Oil Pan
C6.6 Engines for Caterpillar Built Machines Piston Cooling Jets - Remove and Install
C6.6 Engines for Caterpillar Built Machines Pistons and Connecting Rods - Remove
C6.6 Engines for Caterpillar Built Machines Pistons and Connecting Rods - Disassemble
C6.6 Engines for Caterpillar Built Machines Pistons and Connecting Rods - Assemble
C6.6 Engines for Caterpillar Built Machines Pistons and Connecting Rods - Install
C6.6 Engines for Caterpillar Built Machines Connecting Rod Bearings - Remove - Connecting rods in position