326-4635 3264635 Fuel Injection Pump for CAT C6.4 Engine 320D 321D 323D Excavator

The 326-4635 fuel injection pump is a fuel injection pump assembly designed for CAT C6.4 diesel engines used in construction excavators.

The pump is officially listed for several excavator models including 320D, 320D L, 320D LN, 320D GC, 320D FM, 320D LRR, 320D RR, 321D LCR, 323D, 323D L, 323D LN and 323D SA. Caterppillar also lists 10R-7662 as the Cat Reman fuel injection pump alternative.

OEM and Cross Reference Numbers

• 326-4635
• 3264635
• 10R-7662 - Reman alternative
• 32F61-10302 - reported aftermarket cross reference

Important: 10R-7662 is documented by CAT as the Reman alternative for 326-4635. Other numbers such as 32F61-10302 appear in aftermarket catalogs and should be confirmed against the actual pump before being presented as an OEM interchange.

How to Confirm the Correct Fuel Injection Pump

Before ordering, customers should provide:

1. Fuel injection pump nameplate photo
2. Pump part number
3. Engine model
4. Engine serial number
5. Excavator model
6. Machine serial number
7. Photos of the existing pump

For this product, the key identification number is 326-4635 / 3264635.