5L1645 — PUMP,COOLING SYSTEM,ENGINE

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

5L1645: PUMP,COOLING SYSTEM,ENGINE.

The PUMP,COOLING SYSTEM,ENGINE is a the manufacturer thermal management component critical for maintaining optimal operating temperatures in enterprise hardware. This part is cataloged in the U.S. Government catalog under NSN 4320-01-191-4309, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

5L1645

NSN: 4320-01-191-4309
FSC: 4320 — Power and Hand Pumps
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)

SPECIFICATIONS

Part Number	5L1645
NSN	4320-01-191-4309

COMPONENT DIAGRAM

TYPICAL APPLICATIONS

Server thermal management and cooling
Hot-swap fan replacement in production environments
Redundant cooling for high-availability systems

SUBSTITUTES & CROSS-REFERENCES 2

3N4304Reference document

Same NSN cross-reference

Reference document — Drawing number reference only

3N4304 PIECE 31Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 5L1645?

5L1645 is a PUMP,COOLING SYSTEM,ENGINE.

What parts can replace 5L1645?

There are 2 known substitutes for 5L1645: 3N4304, 3N4304 PIECE 31. Substitute compatibility should be verified for your specific system.

What is the NSN for 5L1645?

5L1645 is cataloged in the U.S. Government catalog under NSN 4320-01-191-4309. This indicates validated use in U.S. government and defense supply chains.

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