RING-RETAINING 7N1017 - Caterpillar

Marine Engines:
3408 (S/N: 99U1-UP)
3408 (S/N: 78Z1-UP; 60M1-UP; 81Z1-UP)
3408B (S/N: 1LG1-UP)
3408C (S/N: 1TS1-UP)
3412E (S/N: 9PW1-UP)
Engine News SEBD9395, 24 April 2006, "New Water Cooled Exhaust Manifold". Disregard this article. Refer to the article that follows.Cracks in the welding are found on 7N-3175 Manifold. The 7N-3175 Manifold is used on 3408 and 3412 engines. The cracks in the welding are due to poor coolant flow.The flow of coolant and venting through the manifold has been improved. The new manifold eliminates the hot spots. The hot spots promote cracking.3408
The following parts list is required to update the 7N-3175 Manifold to the 147-0642 Manifold.
Table 1
Required Parts    
Pt. No.     Description     Qty    
3D-2824     O-Ring Seal     1    
5P-1230     Connector     1    
7W-1890     Elbow     1    
7X-7958     Hose Clamp     2    
5P-1251     Hose     27 cm.    
4N-1918     Gasket     2    
7C-0307     Gasket     10    
109-0076     O-Ring Seal     8    
7M-7273     Gasket     1    
156-1732     Tube As     1    
198-6068     Integral Seal     1    
126-2702     Integral Seal     1    
147-0642     Manifold As     1    Upon installation of the 147-0642 Manifold, remove the 6N-9300 Tube As, the 9L-4007 Flared Elbow and the 6N-4573 Oil Tube As. Discard the 6N-9300 Tube As, the 9L-4007 Flared Elbow and the 6N-4573 Oil Tube As. The new lines group uses a coolant hose and fittings. The new lines group replaces the tube assembly. Installation of a 156-1732 Oil Supply Tube is also required. Refer to Illustration 1 for assembly instructions.
Illustration 1 g01260499
(1) 7W-1890 Elbow (2) 7X-7958 Hose Clamp (3) 5P-1251 Hose (4) 5P-1230 Connector (5) 3D-2824 O-Ring Seal (6) 7X-7958 Hose Clamp 3412 and 3412E
The following parts list is required for the (S/N: 60M), the (S/N: 81Z) and the (S/N: 9PW).
Table 2
Required Parts for 4W-3920, 7W-7584, 124-3400, 179-0770, 144-4583 and 183-3882    
Pt. No.     Description     Qty    
3D-2824     O-Ring Seal     1    
5P-1230     Connector     1    
005-4273     Hose Connector     1    
006-5707     Pipe Elbow     1    
7X-7958     Hose Clamp     1    
5P-1251     Hose     27 cm    
4N-1918     Gasket     2    
7C-0307     Gasket     10    
109-0076     O-Ring Seal     8    
7M-7273     Gasket     1    
140-0024     Tube As     1    
198-6068     Integral Seal     1    
126-2702     Integral Seal     1    
147-0642     Manifold As     1    Upon installation of the 147-0642 Manifold, remove the 1W-6245 Tube As and the 1W-6250 Oil Tube As. Discard the 1W-6245 Tube As and the 1W-6250 Oil Tube As. The new lines group uses a coolant hose and fittings. The new lines group replaces the tube assembly. Installation of a 140-0024 Oil Supply Tube is also required. Refer to Illustration 2 for assembly instructions.
Illustration 2 g01260513
(1) 006-5707 Pipe Elbow (2) 005-4273 Hose Connector (3) 7X-7958 Hose Clamp (4) 5P-1251 Hose (5)