- Engine:
- 3508B (S/N: S2D1-UP; 3DM1-UP; 7SM1-UP; 1TW1-UP)
- Generator Set:
- 3512B (S/N: 1GZ1-UP)
- 3512B (S/N: S2J1-UP; S2L1-UP; 8EM1-UP; 4TN1-UP; 1PW1-UP; 2GW1-UP; 2EZ1-UP)
- 3516B (S/N: 8KN1-UP; 9AN1-UP; S2S1-UP; 4BW1-UP; S2X1-UP)
- 3516B (S/N: 1HZ1-UP)
Description of Change: New tubes and a new bracket are used for all 3500B Engines that use a plate type heat exchanger. The new tubes have a larger bend radius and the new bracket is stronger. The new tubes also provide an optimal direction of flow to the heat exchanger.
Adaptable To:
 | |
| Illustration 1 | g01092221 |
Former layout of the tubes and the tube assemblies | |
 | |
| Illustration 2 | g01663817 |
New layout of the tubes and the tube assemblies (1) 253-6238 Tube (2) 253-6236 Tube As (3) 253-6239 Tube (4) 253-6233 Tube As | |
The 141-0061 Water Lines Gp has been updated.
The new 253-6235 Bracket must be used when a new tube assembly is installed.
If any of the former tubes or the tube assemblies that are listed in Table 1 need to be replaced, replace all of the former tubes and the tube assemblies with the new parts.
All of the former tubes have been cancelled and replaced by the new tubes.
| Former Part Numbers and New Part Numbers | |||
| Former Part Number | Description | New Part Number | Description |
| 149-2143 | Tube As | 253-6236 | Tube As |
| 141-1524 | Tube | 253-6238 | Tube |
| 149-2201 | Tube As | 253-6233 | Tube As |
| 140-9879 | Tube | 253-6239 | Tube |
| 210-1200 | Bracket As | 253-6235 | Bracket |
| 212-4684 | Spacer | ||
| Serial Number Effectivity |
| S/N:3DM00495 |
| S/N:7SM00796 |
| S/N:1TW00343 |
| S/N:S2D00102 |
| S/N:4TN00755 |
| S/N:1PW00413 |
| S/N:2EZ00337 |
| S/N:8EM00433 |
| S/N:2GW00393 |
| S/N:S2L00182 |
| S/N:S2J00131 |
| S/N:4BW00544 |
| S/N:8KN00573 |
| S/N:S2X00169 |
| S/N:S2S00136 |
| S/N:1HZ02571 |
| S/N:9AN00375 |
| S/N:1GZ02095 |