Description
Genuine Freightliner 05-20763-002 OEM coolant surge tank cap, rated 15 +2/-0 PSI with M52 x 2.5 threads. Used as the radiator surge-tank pressure cap on Cascadia, Columbia, FLD/FLC, and FPR cabovers, plus Western Star 5700XE coolant systems. Supersedes the earlier 05-20763-000 and 05-20763-001 part numbers.
Specifications
| Manufacturer | Freightliner (Daimler Truck) — Genuine OEM |
|---|---|
| Part Number | 05-20763-002 |
| Part Type | Coolant Surge Tank / Radiator Pressure Cap |
| Pressure Rating | 15 +2/-0 PSI |
| Thread | M52 x 2.5 mm, screw-on |
| Material | Black plastic body, nitrile O-ring and gasket |
| Supersedes | 05-20763-000, 05-20763-001 |
Cross References
This surge tank cap replaces or is equivalent to the following part numbers:
- Freightliner: 05-20763-000, 05-20763-001, 05-20763-002
- Automann: 572.2002
Applications
Fits the following Freightliner and Western Star coolant surge tanks:
- Freightliner Cascadia (all model years using the screw-on surge tank)
- Freightliner Columbia and Coronado
- Freightliner FLD / FLC / FPR cabovers
- Freightliner Business Class M2 with the matching surge-tank neck
- Western Star 5700XE (shares the screw-on M52 x 2.5 surge-tank interface)
Verify the surge-tank neck threads (M52 x 2.5) and required pressure rating before installation. Replace the cap whenever the cooling system is opened for service.





