Valve Bonnets with Insufficient Hardness Caterpillar


Valve Bonnets with Insufficient Hardness

Usage:

Valve Bonnets with Insufficient Hardness

CONFIDENTIAL TIBU4219-00

TECHNICAL INFORMATION BULLETIN

April 14, 2004

On-highway Engines

 

Industrial Engines

 

 

 

 

Generator Set Engines

 

 

 

 

 

Marine Engines

 

Machine Engines

3406B (4MG, 7FB, 5KJ, 3ZJ, 7XC)

3406C (5KJ, 3ZJ,)

3406 (90U)

3406B (6TB)

3406C (3ER, 6TB)

3408C (9XM)

3412 (BCS)

3406B (2WB, 2RJ, 4RG, 4JK, 4PM, 9PL)

3406C (2WB, 2RJ, 4RG, 4JK, 1LS, 4ZR, 1DZ, 406)

3412 (2WJ, 9JR, BLG)

3412C (BAK)

3406B (4TB)

3406C (4TB, 1SS, 2AM, 4BM)

3306 (08Z)

3406 (11N, 70V, 41Z)

3406C (D2E)

3412C (2SZ, 5LJ)

 

Component Code: 1251

SUBJECT: Valve Bonnets with Insufficient Hardness

PROBLEM:

Some 108-2102 valve bonnets may crack due to a lack of sufficient hardness. The lack of hardness is caused by an insufficient heat treatment to the valve bonnets. Parts received through the parts system between February 17, 2004 and March 15, 2004 are suspect. The defective bonnets are matte silver in color. Bonnets with sufficient hardness are dull grey/black in color. The following dealers received parts from the parts system during the above time period.

 

 

B040

B420

D391

E103

H373

N020

T130

B041

B430

D420

E134

H374

N022

T213

B044

B431

D423

E147

H377

N025

U067

B090

B433

D434

E250

H380

N027

B132

D073

D436

E274

J040

N031

B157

D080

D438

E350

J201

N050

B160

D088

D440

E450

J210

N070

B162

D090

D441

E451

J217

N120

B166

D092

D445

E452

J261

N121

B167

D093

D480

E453

J281

N124

B190

D100

D491

E480

J287

N170

B250

D113

D500

E500

J370

N179

B253

D115

D531

E513

J403

P380

B271

D118

D580

E515

M410

Q301

B274

D126

E070

E516

M450

Q302

B290

D180

E074

H270

M610

R050

B291

D242

E080

H273

M611

R061

B294

D310

E081

H334

M614

R080

B296

D312

E092

H349

M633

R123

B350

D390

E093

H36A

M681

R460

 

SOLUTION:

The suspect parts should not be used in order to make a repair. Any repair made with the suspect parts received during the above listed time period should be inspected. Bonnets that are the matte silver color may crack, and thus should be replaced. Return all suspect bonnets to the following address.

 

Caterpillar, Inc.

Service Claims Room

8201 N. University Street

Peoria, Il 61615

Attn: Roger Hudson / Bonnets

 

This TIB should be shared with all TEPS dealers.

COPYRIGHT 2004 CATERPILLAR
ALL RIGHTS RESERVED

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