LOCK 8S1491 - Caterpillar

Engine:
3176C (S/N: 2AW1-UP; 6BW1-UP)
3196 (S/N: 2XR1-UP; 1DW1-UP)
C-10 (S/N: BCX1-UP)
C-12 (S/N: BDL1-UP)
Engine News SEBD9324-00, August 2003, "Use the Correct Front Housing Bolts". Disregard this article. See the article that follows.The front of the engine blocks have been modified. This modification requires the use of different bolts that attach the front housing to the engine block. Use Table 1 to determine the type of bolt that will be used. The "Type 1" bolt is 30 mm (1.18 inch) in length. The "Type 2" bolt is 40 mm (1.57 inch) in length. The "Type 2" bolt is used due to a deeper counterbore in the engine block. The use of the incorrect bolt may cause damage to the threads. The use of the incorrect bolt will not properly tighten the front housing to the engine block.
Table 1
    Engine Model     Serial Number Prefix     Serial Number (Type 1)     Serial Number (Type 2)    
Industrial     3176C     S/N:2AW     1-1328     1329-Up    
    3196     S/N:1DW     1-627     628-Up    
    C-10     S/N:BCX     1-268     269-Up    
    C-12     S/N:BDL     1-236     237-Up    
Marine     3176C     S/N:6BW     1-500     501-Up    
    3196     S/N:2XR     1-4248     4249-Up     Use Table 1 to identify your type of engine. If your engine is a Type 1 proceed to "Type 1". If your engine is a Type 2 proceed to "Type 2". If you have a remanufactured engine then proceed to "Remanufactured Engines". The following illustrations will provide added information on the installation of the front housing.Note: The 216-4781 Gasket Kit is available for the engines that are listed in Table 1. The gasket kit will include the following components: 211-2822 Gasket, 204-0712 Bolt and 204-0714 Bolt .Type 1
Illustration 1 g00856488
6V-2317 Bolt
Illustration 2 g00856491
204-0712 Bolt The two bolts (Type 1) are 30 mm (1.18 inch) long. Marks on the head of the bolt represent the grade of the bolt. These markings can be seen in Illustration 1 and 2. The 6V-2317 Bolt is replaced by 204-0712 Bolt. The 204-0712 Bolt has a torque value of 40 8 N m (30 6 lb ft). 13 bolts are required for the installation of the front housing.Type 2
Illustration 3 g00856344
204-0714 Bolt The 204-0714 Bolt is 10 mm (0.39 inch) longer than the 204-0712 Bolt. The longer bolt is needed due to a deeper counterbore and the tapped hole. Do Not use the 204-0712 Bolt or the 6V-2317 Bolt. This could result in damage to the threads. The torque on the 204-0714 Bolt is 35 8 N m (26 6 lb ft). 13 bolts are required for the installation of the front housing.Remanufactured Engines
Illustration 4 g00838008
Depth of counterbore (Y) requires engines to use 204-0712 Bolt .
Illustration 5 g00838007
Depth of counterbore (Z) requires engines to use the 204-0714 Bolt .Remanufactured engines require special attention