GEAR-PINION 1287855 - Caterpillar

Engine: 3412C (S/N: 9BR1-UP; 4121-UP)Introduction
This Special Instruction is intended to provide information on the Engine Overhaul Kit Consist and detailed information on specific parts that should be used based on engine arrangements.This Engine Overhaul Kit may contain extra parts and extra quantities due to the variety of engine arrangements assigned to a given kit. Refer to the corresponding Parts Manual or Disassembly and Assembly manual in Table 1.Note: This Kit may contain upgraded parts. These upgraded part numbers may be different than what you have in the parts manual or engine, but these parts have been technically reviewed for compatibility with your application. Note: This kit contains gasket kits and includes additional parts needed to perform an engine overhaul.Note: This kit does not contain rod bearings, main bearings, and thrust plates. Note: For assistance with technical questions, contact your local Cat dealer. Note: For more information, visit us at catmarinesupport.com.Note: For access to our website, you can scan the QR code below with a QR enabled device.
Illustration 1 g03323398
Reference Material
Table 1
Engine Model     Engine Arrangement     Engine Serial Number Range     Parts Book Media     Disassembly and Assembly Media    
3412C     179-3232     S/N:9BR1-UP     SEBP2524     SENR1133    
179-0775
179-0773
179-0778
183-5416
238-5363 S/N:4121-UP     SEBP3959     SENR1133    
238-5357
238-5355
238-5359 Note: For ordering reference material contact your local Cat dealer.3412C 436-1678 Major Overhaul Kit Consist
Table 2
436-1678 Major Overhaul Kit Consist    
Gasket Kits    
Part Number     Part Name     Qty    
219-6544     After Cooler and Lines Gasket Kit     1    
234-1630     Rear Structure Gasket Kit     1    
419-8215     Central and Lower Structure Gasket Kit     1    
419-8222     Front Structure Gasket Kit     1    
419-8601     Single Cylinder Head Gasket Kit     2    
419-9849     Fuel System Gasket Kit     1    
420-8545     Oil Cooler and Lines Gasket Kit     1    
Additional Parts Included in This Kit    
Part Number     Part Name     Qty    
1R-0749     Fuel Filter     2    
1R-1808     Engine Oil Filter     2    
2B-2695     Bolt     4    
2K-4973     Locknut     1    
2N-2766     Locknut     24    
2N-8109     Clamp     1    
2S-2760     Spring     1    
3B-1915     Bolt     2    
3D-2824     O-Ring Seal     1    
3G-2292     Locking Bolt     5    
4H-9541     Gasket     1    
4L-8337     O-Ring Seal     2    
4M-1336     Ferrule     1    
4N-0342     Plate     1    
4N-0685     Bushing     5