This is a new, genuine Kubota water pump assembly, part number 16251-73037. It fits Kubota 05 series diesel engines: the D905, D1005 and D1105 three-cylinders and the V1505 four-cylinder. Kubota machines that use it include the B21, B2301 and B2320 tractors and the BX2670 and BX2680 tractors. It replaces the older number 16251-73034.

These engines also power many mowers, loaders and other OEM machines, so match the pump by engine model and serial number, not only by machine. Replace it when the weep hole leaks coolant, the bearing is rough or loose, or the impeller is corroded.

Specifications

Fits / Applications

• Kubota D905, D1005 and D1105 diesel engines
• Kubota V1505 diesel engine
• Kubota B21, B2301 and B2320 tractors
• Kubota BX2670 and BX2680 tractors

Fit a new water pump gasket and clean the mating face. Refill and bleed the cooling system, then check fan belt condition and tension.

Part Numbers & Cross Reference

Kubota (replaced number) 16251-73034

Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.

Frequently Asked Questions

Will Kubota water pump 16251-73037 fit a BX2680 or a B2301?

Both are on the list. Kubota machines that use it include the B21, B2301 and B2320 tractors and the BX2670 and BX2680 tractors. It fits the D905, D1005 and D1105 three-cylinder engines and the V1505 four-cylinder.

Does 16251-73037 replace the older Kubota number 16251-73034?

Yes. 16251-73037 replaces the older number 16251-73034, so a pump or parts list showing 16251-73034 leads to this part.

My D1105 is in a mower or loader from another equipment maker. How do I confirm the pump?

Match by engine model and serial number, not only by machine, because 05 series engines are used by many equipment makers. Read both off the engine tag and call 530-668-0818. We confirm the match at no charge before anything ships.

Is there a core charge on 16251-73037, and what else is needed to fit it?

No core charge. It is a new, genuine Kubota water pump assembly sold outright, with nothing to send back. Fit a new water pump gasket and clean the mating face when you install it.

Related Parts

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• Kubota D722 & D902 Water Pump for BX, RTV900 & ZD Mowers | Genuine Kubota 1E051-73036
• Kubota D905, D1005, D1105 & V1505 Starter Motor, 12V 1.2 kW | Genuine Kubota 37560-63010

Why Buy From Valley Fuel Injection

We are an authorized Kubota dealer and a diesel fuel-injection shop in Woodland, CA, working on diesel engines since 1993. When you call, you talk to people who know Kubota engines and can help you match the part number to your engine serial or machine model before you order. See our Kubota engine sales, parts and service.