- Machine Engines:
- 3176C
- 3196
- C-12
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.
| Engine Model | Serial Number (Type 1) | Serial Number (Type 2) | |
| Machine | 3176C | S/N:3PD1-450 | S/N:3PD451-UP |
| 3176C | S/N:7ZR1-6108 | S/N:7ZR6109-UP | |
| 3196 | S/N:5ED1-428 | S/N:5ED429-UP | |
| 3196 | S/N:6AR1-2872 | S/N:6AR2873-UP | |
| C-12 | - | S/N:JAC1-UP |
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 | g00916204 |
6V-2317 Bolt (A) 30 mm (1.18 inch) | |
 | |
| Illustration 2 | g00916206 |
204-0712 Bolt (B) 30 mm (1.18 inch) | |
The two bolts that are 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 Illustration 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 | g00916205 |
6V-5219 Bolt (C) 40 mm (1.57 inch) | |
The 6V-5219 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 6V-5219 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 a6V-5219 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 to "Type 2".
| Dimension | Counterbore Depth | Part Numbers for the Bolts |
| Y | 5 mm (0.20 inch) |
204-0712 Type 1 |
| Z | 15 mm (0.60 inch) |
6V-5219 Type 2 |