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BRACKET AS 3966949 - Caterpillar

3966949 BRACKET AS Caterpillar parts BRACKET
Alternative (cross code) number:
Caterpillar 3966949 BRACKET AS

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Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A - Guide Stud
1/2 inch - UNF by 4 inch 2
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g02062093
Always wear protective gloves when handling parts that have been heated.
If the flywheel ring gear was removed, follow Step 1.a through Step 1.c in order to install ring gear (3) to flywheel (1).
Identify the orientation of teeth (4) on new ring gear (3). Note: The chamfered side of ring gear teeth (4) must face toward the starting motor when the flywheel is installed. The chamfered side of ring gear teeth ensures the correct engagement of the starting motor.
Heat flywheel ring gear (3) in an oven to a maximum temperature of 250 °C (482 °F) prior to installation. Note: Do not use a torch to heat the ring gear.
Ensure that the orientation of ring gear (3) is correct and quickly install the ring gear onto flywheel (1).
Inspect the crankshaft rear seal for leaks. If there are any oil leaks, replace the crankshaft rear seal. Refer to Disassembly and Assembly, "Crankshaft Rear Seal - Install" for the correct procedure.
Illustration 2 g02062053
Install a suitable lifting device on flywheel (1). The flywheel can weigh 55 kg (121 lb).
Install Tooling (A) in Position (X) on the crankshaft.
Use the lifting device to position flywheel (1) onto Tooling (A).
Install bolts (2) to flywheel (1).
Remove Tooling (A) and install remaining bolts (2) to flywheel (1).
Use a suitable tool to prevent the flywheel from rotating. Tighten bolts (2) and (4) to a torque of 140 N m (103 lb ft).
Remove the lifting device from flywheel (1).
Check the run out of the flywheel. Refer to System Operation, Testing and Adjusting, "Flywheel" for more information. End By:
Install the electric starting motor. Refer to Disassembly and Assembly, "Electric Starting Motor - Remove and Install" for the correct procedure.

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