TURBOCHARGER ASSEMBLY 3S8273 - Caterpillar

Caterpillar: Confidential Yellow
PARTS STOCK ACTION ONLY - 7B9744 NUTS MAY HAVE INTERNAL CRACKS - MAILED US AND CANADA, CACO, COFA, CFEL, COSA
  The information supplied in this service letter may not be valid after the termination date of this program.   Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
7B9744 NUTS MAY HAVE INTERNAL CRACKS, 4158, PI7195 U-27 A-15 AU-17 E-13 O-16 parts stock action only Termination Date
May 31, 1988
Problem
Reports indicate that some 7B9744 Nuts may have internal cracks. These cracks could cause the nut to fail.
Action Required
Remove all 7B9744 Nuts from parts stock. Do not attempt to visually inspect the nuts, because the cracks may not be visible.
Service Claim Allowances
Submit one claim for all 7B9744 Nuts removed from parts stock.
Parts Disposition
Destroy all 7B9744 Nuts that are removed from parts stock so they can not be used.