RING-SNAP 9H6933 - Caterpillar

Illustration 25 g06277746
Example of stud with out markings
Illustration 26 g06277743
Example of stud after stud has been tightened. Marks can be made with an X stamp. Be sure to stay away from thread area when stamping.
3600 and C280 Engine Fasteners
Use the following guidelines to determine the serviceability of the fasteners:Thoroughly inspect the fasteners before you reuse any fastener. Do not reuse a fastener that has any damage. Do not reuse a fastener that has any of these defects:
Rust
Nicks
Thread damage
Cracks
Pits
DeformationIf the fasteners appear to be free of defects, also follow these guidelines:
Replace any stud for the cylinder head after the stud has been tensioned 20 times. This criteria includes the 1W-2363 Taperlock Stud, 7E-8400 Taperlock Stud, and 187-0450 Taperlock Stud.
Also replace any stud for the main bearing cap ( 1W-0121 Taperlock Stud) after the stud has been tensioned 20 times.
The cross tie bolt for the main bearing cap ( 3S-7079 Bolt) can only be tensioned five times.
For the Torque Turn Bolts 1W-0098, 369-7181, and 467-0537, refer to Engine News, SEBD9992, "A New Torque Procedure for Connecting Rod Bolts Is Now Used on 3600, G3600, and C280 Engines".
Inspect connecting rod bolts at each service of the connecting rod bearings. There should be no fretting on the shank, knurled or annular ring area (2) of the connecting rod bolt. Ensure that the connecting rod bolt meets the guidelines for the reusable parts. Do not reuse the connecting rod nuts.
Prior to installation of the new 467-0537 Bolt As, inspect heat shrink tube (1). The tube serves as an alignment sleeve for the bolts.
The heat shrink tube must be firmly in place and must not move under light finger pressure.
The whole surface of the tube must be smooth.
The tube must not extend into the fillet that is under the bolt head.
If a problem is found with the tube, use the following replacement procedure.
Carefully cut the heat shrink tube from the bolt.
Ensure that there is no damage to the shank of the bolt that was under the tube.
Clean the shank of the bolt with solvent to remove any oil.
Install a new 369-7183 Heat Shrink Tube onto the bolt. Position the tube approximately 1.5 mm (0.059 inch) under the bolt head, away from the fillet that is under the bolt head.
Use a heat gun or place the bolt and tube in an oven at 135° 14°C (275° 25°F) for 10 minutes. The tube must shrink into place without any bumps or wrinkles.
After the bolt cools, the tube must be firmly in place. The tube must not move under light finger pressure.
Make sure that the surface of the tube is smooth all around. Verify that the tube does not extend onto the fillet that is under the bolt head.Note: The 467-0537 Bolt As may be tightened for a maximum of five times. The reuse includes retightening after checking the rod bore or bearing clearance. Do not reuse the connecting rod nuts.
An overloaded bolt can be detected by threading a new 205-0640 Nut onto the bolt