MOTOR GP-PISTON 2668034 - Caterpillar

Industrial Engines:
3176B (S/N: 3NL1-UP)
3176C (S/N: 2AW1-UP)
3196 (S/N: 1DW1-UP)
3406E (S/N: 6BR1-UP)
3456 (S/N: 3LW1-UP)
Marine Engines:
3176B (S/N: 9WK1-UP)
3176C (S/N: 6BW1-UP)
3196 (S/N: 2XR1-UP)
3406E (S/N: 9WR1-UP)
Description of Change: The torque for nuts (1) on the wiring harness assembly for the fuel injector has been increased. The former torque was 1.70 0.25 N m (15 2 lb in). The specified torque for the nuts has been increased to 2.50 0.25 N m (22 2 lb in). The increase in torque will help prevent continuity and electrical short problems.
Illustration 1 g00660845
Nut (1) on the wiring harness.Adaptable To: The increased torque for the nuts on the wiring harness assembly for the fuel injector affects the following modules for the service manuals. See the following chart.
Table 1
Service Manuals Affected by Increased Torque    
Engine Model     Serial Number     Serial Manual     D&A Module     Specifications Module    
3176B     3NL     SENR6565     SENR6534     SENR6462    
9WK SENR6505     SENR6509     SENR6507    
3176C, 3196     2AW     SENR1175     SENR1178     SENR1172    
6BW RENR1215     RENR1233     RENR1231    
3406E, 3456     6BR     SENR1070     SENR1068     SENR1066    
9WR SENR1165     SENR1169     SENR1167