INSULATION 3963656 - Caterpillar

PROBLEM
The existing 238-4665 Taperlock Stud can elongate due to thermal expansion on certain C15 Industrial Engines. If the existing 238-4665 Taperlock Stud elongates, the stud can loose its clamping ability.
AFFECTED PRODUCT
Model Identification Number
C15 JEP00001-00057
DV-C15 KRA00100-00103, 105-112
TRB00003-00008
PARTS NEEDED
Qty
Part Number Description
4 1687800 LOCKNUT HEX
1 2746851 GASKET-TURBO
4 3139550 STUD-TAPERLOCK
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 32% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.
ACTION REQUIRED
Replace the 238-4665 Taperlock Studs with 313-9550 Taperlock Studs.
Refer to the attached Rework Procedure.
SERVICE CLAIM ALLOWANCES
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts % Labor Hrs% Parts % Labor Hrs% Parts % Labor Hrs%
0-4000 hrs,
0-24 mo 100.0% 100.0% 0.0% 0.0% 0.0% 0.0%
This is a 2.0-hour job
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Rework Procedure
1. Remove the 238-4665 Taperlock Studs from the exhaust manifold.
2. Install four 313-9550 Taperlock Studs onto the exhaust manifold.
3. Install the turbocharger onto the 313-9550 studs with a new 274-6851 turbocharger gasket.
4. Install four 168-7800 locknuts (1) onto the 313-9550 studs.
Image1.1.1
5. Tighten each locknut to a torque of 35 Nm (26 lbft) in a crisscross pattern.
6. Tighten each locknut an additional 60 degrees in a crisscross pattern.