- Caterpillar Products: Machine Engines
- All 3500 Series
Description of Change: A new fuel transfer pump is being used on 3500 Diesel Engines for Caterpillar Machines. A portion of the new pump housing is cast in a single continuous section. The former pump used separate sections. Refer to Illustrations 1 and 2.
The mounting bolts for the new pump have changed. Refer to Tables 1 and 2.
Adaptable To: Three part kits are available for the new fuel transfer pump. The 255-8691 Seal Kit is a service kit for the seals and for the gasket. The 255-8692 Repair Kit is a service kit for the gear and for the shaft. The 256-8766 Repair Kit is a service kit for the bypass valve. Refer to Table 2.
The new 255-8113 Fuel Transfer Pump Gp is a direct replacement for the former 225-4260 Fuel Transfer Pump Gp. The new pump is adaptable to all 3500 Diesel Engines that are used in Caterpillar Machines. Table 3 lists the serial number effectivity for 3500 Diesel Engines that are used in Caterpillar Machines.
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| Illustration 1 | g01106868 |
Former fuel transfer pump (1) 5L-1761 Bolt (2) 3H-3243 Bolt (3) 225-4260 Fuel Transfer Pump Gp | |
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| Illustration 2 | g01106869 |
New fuel transfer pump (1) 5L-1761 Bolt (4) 255-8113 Fuel Transfer Pump Gp | |
| Former Pump | |
| Part Number | Quantity |
| 3H-3243 Bolt | 2 |
| 5L-1761 Bolt | 2 |
| New Pump | |
| Part Number | Quantity |
| 5L-1761 Bolt | 4 |
| 255-8691 Seal Kit | 1 |
| 255-8692 Repair Kit | 1 |
| 256-8766 Repair Kit | 1 |
| Serial Number Effectivity | |
| (S/N: 1AW00653-UP) | (S/N: 8BR01047-UP) |
| (S/N: 2CS01085-UP) | (S/N: 8WM00547-UP) |
| (S/N: 2GR05367-UP) | (S/N: 54Z01209-UP) |
| (S/N: 2PK01626-UP) | (S/N: 96Z00938-UP) |
| (S/N: 4WJ01311-UP) | (S/N: 99W03555-UP) |
| (S/N: 7TR01568-UP) | (S/N: 7YG02215-UP) |