CARBURETOR 5F3527 - Caterpillar

Engines:
3176C (S/N: 2AW1-UP; 6BW1-UP)
3196 (S/N: 1DW1-UP; 2XR1-UP)
C-10 (S/N: BCX1-UP)
C-12 (S/N: BDL1-UP)
The front of the engine block has been modified. This modification requires the use of a new front cover gasket and different bolts that attach the front housing to the engine block. The new front cover gasket and different bolts help to provide an improved seal between the front housing and the engine block. The correct bolts need to be used to attach the front housing. Use Table 1 to identify your Type of engine.
Table 1
    Engine Model     Serial Number Prefix     Serial Number (Type 1)     Serial Number (Type 2)    
Industrial     3176C     2AW     1-1328     1329-up    
    3196     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     6BW     1-500     501-up    
    3196     2XR     1-42478     -    Table 1 is your guide for selecting your correct 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 proceed to "Remanufactured Engines". The following illustrations will provide added information on the installation of the front housing.Check for availability of a gasket kit. The gasket kit will include a new front cover gasket, both the 30 mm (1.18 inch) bolts and the 40 mm (1.57 inch) bolts. This kit can be used to service Type 1, Type 2, and Remanufactured Engines.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
40 mm (1.57 inch)The 40 mm (1.57 inch) 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 40 mm (1.57 inch) 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 a 40 mm (1.57 inch) bolt.The counterbore in the engine block must be measured in order to determine the bolts that will be used. If your engine block has a counterbore (Y) of 5 mm (0.20 inch), proceed to "Type 1". If your engine block has a counterbore (Z) of 15 mm (0.60 inch), proceed