- Engine:
- 3508B (S/N: 5PS1-UP)
- 3508C (S/N: F1X1-UP)
- 3512B (S/N: 3ZW1-UP)
- 3512C (S/N: NJT1-UP; F2X1-UP)
The new accessory drive groups utilize a thrust washer that enables the drive groups to withstand axial forces.
The new 365-7633 Accessory Drive Gp replaces the original 7C-4113 Accessory Drive Gp in the above engines. The 7C-4113 Accessory Drive Gp is not canceled.
The new 368-2087 Accessory Drive Gp replaces the original 282-5194 Accessory Drive Gp in the above engines. The 282-5194 Accessory Drive Gp is not canceled.
The new 365-7633 Accessory Drive Gp is a single accessory drive and the The new 368-2087 Accessory Drive Gp is a dual accessory drive. The only difference between the accessory drive groups is the number of parts.
 | |
| Illustration 1 | g02692077 |
(1) 364-6393 Adapter As (2) 362-8082 Accessory Drive Gear (3) 7N-7539 Thrust Washer (4) 2B-2695 Bolt (5) 9M-1974 Hard Washer | |
| Item | Qty | Parts Needed for the New 368-2087 Accessory Drive Gp | Replaced Parts from the Original 282-5194 Accessory Drive Gp |
| 1 | 2 | 364-6393 Adapter As | 7C-4164 Adapter As |
| 2 | 2 | 362-8082 Accessory Drive Gear | 7W-1102 Accessory Drive Gear |
| 3 | 4 | 7N-7539 Thrust Washer | |
| 4 | 8 | 2B-2695 Bolt | |
| 5 | 8 | 9M-1974 Hard Washer |
| Item | Qty | Parts Needed for the New 365-7633 Accessory Drive Gp | Replaced Parts from the Original 7C-4113 Accessory Drive Gp |
| 1 | 1 | 364-6393 Adapter As | 7C-4164 Adapter As |
| 2 | 1 | 362-8082 Accessory Drive Gear | 7W-1102 Accessory Drive Gear |
| 3 | 2 | 7N-7539 Thrust Washer | |
| 4 | 4 | 2B-2695 Bolt | |
| 5 | 4 | 9M-1974 Hard Washer |
The new accessory drive groups are adaptable to the above engines back to first production. Effective serial numbers are listed in Table 3.
| Effective Serial Numbers |
| S/N:NJT00176 |
| S/N:F1X00129 |
| S/N:F2X00149 |
| S/N:3ZW01141 |