C11 and C13 Engines for Caterpillar Built Machines Finding Top Center Position for No. 1 Piston Caterpillar

Finding Top Center Position for No. 1 Piston
C11 and C13 Engines for Caterpillar Built Machines [SENR9888]
1.1. Disassembly and Assembly of the Timing Pin
2.1. Procedure for Pin Timing

Table 1
Required Tools 
Tool  Part Number  Part Name  Qty 
208-0888  Engine Turning Tool 
350-7549  Engine Turning Tool 
9S-9082  Engine Turning Tool 
136-4632  Timing Pin 
208-9387  Timing Pin 
208-9388  Adapter 
5P-7305(1)  Engine Turning Tool 
456-7526(1)  Timing Pin 
(1) This is for a 966H C11engine

Disassembly and Assembly of the Timing Pin

Use the following procedure in order to assemble the engine timing pin.

    Illustration 1g02506600
    (D) 136-4632 Timing Pin

  1. Begin with timing pin (D).

    Illustration 2g02506616
    Disassembled 136-4632 Timing Pin timing pin

  2. Disassemble timing pin (D).

    Illustration 3g02506619
    Comparing timing pins
    (E) 208-9387 Timing Pin
    (F) 208-9388 Adapter
    (1) Pin that is removed from 136-4632 Timing Pin

  3. Install timing pin (E) and adapter (F) into timing pin assembly (D). Utilize both the springs that were removed during the disassembly.

Illustration 4g01974153
(2) Timing pin assembly (D) with the 208-9387 Timing Pin installed

Illustration 5g06218688
456-7526 Timing Pin
(3) Screw end
(4) 208-9388 Adapter
(5) 3N-6233 Spring
(6) Pin

Procedure for Pin Timing

Illustration 6g01925035
Flywheel housing
(1) Timing hole

    Note: The opposite side of the flywheel housing can be used for this procedure. When using the opposite side, the shorter timing pin will need to be used to perform the procedure.

  1. Remove plug (1) from the timing hole that is located in the flywheel housing. Install the assembled timing pin into the timing hole.

    Note: If the flywheel is turned beyond the point of engagement, the flywheel must be turned in the direction that is reverse of normal engine rotation. Turn the flywheel by approximately 30 degrees. Then turn the flywheel in the direction of normal rotation until the timing pin engages with the threaded hole. This procedure eliminates the backlash from the gears when the No. 1 piston is at the top center position.

    Illustration 7g02235474

  2. Install tool (A) into the gear in the top left-hand side of the flywheel housing.

    Tool (A) is used for turning the flywheel in the flywheel housing. Turn the engine in the direction of engine rotation. The direction of engine rotation is counterclockwise, as the engine is viewed from the flywheel end. Turn the engine until the timing pin engages with the threaded hole in the flywheel.

    Note: Tooling (B) or (C) may also be used to turn the flywheel. Either of the three tools may be used depending on the application and available space.

  3. Remove the valve mechanism cover from the engine.

    Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install".

  4. The inlet and exhaust valves for the No. 1 cylinder are fully closed if No. 1 piston is on the compression stroke. Also, the rocker arms can be moved by hand when the piston is on the compression stroke. If the rocker arms cannot be moved and the valves are slightly open, the No. 1 piston is on the exhaust stroke.

    Note: When the actual stroke position is identified, and the other stroke position is needed, remove the timing bolt from the flywheel. Then turn the flywheel by 360 degrees in the direction of normal engine rotation and reinstall the timing bolt.

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