C13 Tier 4 Final Engines Caterpillar


Gear Group (Front) - Time

Usage:

730C2 2T4

Safety Precautions

------ WARNING! ------

Do not operate or work on this engine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manual. Failure to follow the instructions or heed the warnings could result in injury or death. Contact any Caterpillar dealer for replacement manuals. Proper care is your responsibility.


Specifications

N/A

Introduction

The basis for correct fuel injection timing and valve mechanism operation is determined by the notched gear teeth and the alignment of the front gear group. The timing notches are located on one tooth of the cam gear and one tooth of the crank gear. The gear teeth and the notch are used to measure speed and timing.

Required Tools

Hand tools

Test Preparation

Remove the gear group front cover. Refer to Disassembly and Assembly, "Gear Group (Front) - Remove".

Test Procedures



Illustration 1g01126079
Front Gear Group
(1) Camshaft gear and timing reference ring
(2) Timing marks
(3) Idler gear
(4) Crankshaft gear

Note: If timing reference ring (1) is installed backward, the engine will not start.

Check for proper alignment of the camshaft gear and timing reference ring (1) on the camshaft assembly. Inspect the key between the timing reference ring and the camshaft gear. Check the teeth on the timing ring. The teeth should not be defaced. The teeth should have sharp clean edges and the teeth should be free of contaminants.

Note: The electronic injection timing must be calibrated after reassembly of the front gear train. Refer to Troubleshooting, "Engine Speed/Timing Sensor - Calibrate".

Reinstall the gear group front cover when finished. Refer to Disassembly and Assembly, "Gear Group (Front) - Install"

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