This article introducesCaterpillar 311F LRR - JFT Crawler Excavator Engine Camshaft gear Removal and Installation


-Removing and installation

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Removing steps







begin:





A. Remove the rocker shaft and pushrod. For the correct steps, see Disassembly and Assembly, "Rocker Shaft and Purod-Remove".



pay attention to

Keep all the parts clean without impurities.

Impurities can cause rapid wear and shorten the service life of the components.



pay attention to



When inspecting, maintaining, testing, adjusting and repairing products, be careful to ensure that the liquid is held in the container. Before opening any chamber or disassembling any part with stored storage.

Dispose of all liquids in accordance with local regulations and instructions.




1. Remove the idler wheel. See Disassembly and Assembly, "Idler-Disassembly" for the correct steps.

2. Ensure that the tool (A) is kept in place during the removal and installation steps of the camshaft gear.

3. Remove the tool (B).






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4. Remove the bolts (3) from the camshaft (4).

5. Remove the camshaft timing ring (2) from the positioning pin (5).

6. Remove camshaft gear (1) from camshaft (4) using tool (C).
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Installation steps

1. Ensure that all parts are clean and free from wear or damage. If necessary, replace all worn or damaged parts.

2. If tool (A) is not installed, install tool (A). For the correct steps, see Disassembly and Assembly, "Idler wheel-"

dismantle ".

3. Lubricate the wheel teeth of the gears (1) with a clean engine oil.

4. Align the timing mark on the camshaft (4) position (V) with the timing mark on the front housing position (W).

5. Position the camshaft gear (1) on the camshaft (4). Ensure the positioning pin (6) is mounted into the hole (X) of the camshaft.

6. Ensure that the chamferals on the crankshaft gear position (Y) are between the timing marks on the camshaft gear position (Z).

7. Install the tool (B). See Disassembly and Assembly, "Idler-Disassembly" for the correct steps.

8. Install the camshaft timing ring (2) on the positioning pin (5).

9. Install the bolts (3) into the camshaft (4). Tighten the bolts to a torque of 25 N-m (221 lb in).
End By :
a. Install the inert wheel. For the correct steps, refer to Disassembly and Assembly, "Idler wheel-Install".
b. Install the rocker arm shaft and push rod. See Disassembly and assembly, "Rocker shaft and pushrod installation" for the correct steps.

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