Usage:
Caterpillar Machines Powered By 3406 (11N Vehicular Engines),
3406B ( 6TB ) Industrial Engines, 3406B ( 2WB, 4RG ) Generator Set Engines, 3406B ( 4TB ) Marine Engines, 3406B ( 3ZJ, 5KJ, 2EK, 4CK ) Truck Engines
Description of Change: A new adapter assembly and new fuel injector line assemblies are used. The former adapter assembly was held in position in the head with an adapter lock. The adapter lock could wear and loosen and allow the adapter to move in the head. This could result in wear on the O-ring seal between the adapter assembly and head. A worn O-ring seal could allow oil to leak out of the head at the adapter assembly. The lock is now part of the new adapter assembly so it will not loosen and allow movement of the adapter. This will help prevent O-ring wear and the resulting oil leaks.
The new fuel line assemblies are stronger than the former fuel line assemblies. The new fuel line assemblies will provide increased service life.
Location of new components. 4P1396 Adapter Assembly (1). 8M4437 O-ring Seal (2). 4P9661 Line Assembly (3). 4P9662 Line Assembly (4). 4P9663 Line Assembly (5). 4P9664 Line Assembly (6). 4P9665 Line Assembly (7). 4P9666 Line Assembly (8).
Adaptable To: The new 4P1396 Adapter Assembly replaces the former 4N1797 Adapter Assembly and 4N1292 Adapter Lock. Each new adapter assembly includes a new 4P1393 Adapter Assembly and 8M4437 O-ring Seal. The new 4P1393 Adapter Assembly is not available for parts service by itself. Only the 4P1396 Adapter Assembly, which includes a 8M4437 O-ring Seal is serviced. The new 4P1396 Adapter Assembly is in effect as shown in the chart. The former adapter assembly and adapter lock are not canceled.
NOTE: If a former adapter assembly and adapter lock are replaced with a new adapter assembly, the former fuel line assembly connected to that adapter assembly must be replaced with a new fuel line assembly. A new fuel line assembly can be used with a former adapter assembly, but a former fuel line assembly should NOT be used with a new adapter assembly.
The new 4P9661 through 4P9666 Line Assemblies are direct replacements for the former line assemblies which are canceled. The new line assemblies are in effect as shown in the chart.
