803788 Mercury SPRING

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 more information, visit us at: electricpowersupport.cat.com.Note: For assistance with technical questions, contact your local Cat dealer.Reference Material
Table 1
Engine Model     Engine Serial Number Prefix     Package Serial Number Prefix     Engine Arrangements     Parts Book Media     Disassembly and Assembly Media    
3412     S/N:81Z     S/N:81Z     2W-7077
1W-9604     SEBP2576     SENR2565    Note: For ordering reference material, contact your local Cat dealer.3412 462-1132 Major Overhaul Kit Consist
Table 2
462-1132 Major Overhaul Kit Consist    
Gasket Kits    
Part Number     Part Name     Qty    
460-0780     Single Cylinder Head Gasket Kit     2    
459-9781     Oil Cooler and Lines Gasket Kit     1    
449-9116     Front Structure Gasket Kit     1    
460-4800     Central and Lower Structure Gasket Kit     1    
419-8267     Rear Structure Gasket Kit     1    
460-4835     After 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    
1S-0004     O-Ring Seal     2    
1S-4295     Gasket     1    
2N-2765     High Temperature Bolt     3    
2N-2766     Locknut     28    
3D-2824     O-Ring Seal     2    
3J-1907     O-Ring Seal     2    
4F-7390     O-Ring Seal     1    
4N-0685     Bushing     5    
4N-1104     Gasket     1    
4N-1868     Gasket     1    
4N-6658     Bushing     2    
5F-9144     O-Ring Seal     1    
6N-0977     Bushing     1    
7B-4910     Gasket     1    
9Y-2988     Breather As     2    
106-1792     Taperlock Stud     24    
112-3540     O-Ring Seal     1    
114-8718     O-Ring Seal     12    
126-2702     Integral Seal     1    
131-7123     Bushing     1    
198-6068     Integral Seal     1    
214-7568     O-Ring Seal     11    
248-5513     Temperature Regulator     2    
272-2583     O-Ring Seal     5    
305-6843     Guide Spring     24    3412 Engine Gasket Kit Locations
Illustration 1 g03708837
(1) Single Cylinder Head ( 460-0780 Gasket Kit ) (2) Front Structure ( 449-9116 Gasket Kit ) (3) Central and Lower Structure ( 460-4800 Gasket Kit ) (4) Oil Cooler and Lines ( 459-9781 Gasket Kit ) (5) Rear Structure ( 419-8267 Gasket Kit ) (6) Aftercooler and Lines Kit ( 460-4835 Gasket Kit )Gasket Kit Consists
Single Cylinder Head (460-0780 Gasket Kit)
Table 3
460-0780 Gasket Kit (Single Cylinder Head)    
Part Number     Part Name     Qty