Kubota 15381-51010 is a new, genuine Kubota injection pump assembly for the B6100 and B7100 compact tractors: B6100D-P, B6100E-P, B6100HST-D, B6100HST-E, B7100D-P, B7100HST-D and B7100HST-E. It is listed for both the old-type and new-type serial ranges of the B7100HST, so that serial split does not change the pump. The B6100 runs the 3-cylinder D650 and the B7100 runs the 3-cylinder D750.

These tractors were built from the late 1970s to the mid 1980s, and many are still at work. Kubota still supplies this complete pump new, and it replaces the older 15241-51080.

Specifications

Fits / Applications

• Kubota B6100D-P and B6100E-P compact tractors
• Kubota B6100HST-D and B6100HST-E compact tractors
• Kubota B7100D-P compact tractor
• Kubota B7100HST-D, old type (S/N 60163 and below) and new type (S/N 60164 and up)
• Kubota B7100HST-E, old type (S/N 20024 and below) and new type (S/N 20025 and up)

Kubota sets injection timing on this style of pump with shims under the pump mounting flange. Keep the old shim stack, fit it under the new pump, then check timing to the Kubota workshop manual spec for your engine. When you fit the pump, use the stop lever to line up the governor fork with the pump’s control rack pin; a missed pin can damage the fork. Find out why the old pump failed, then flush the tank and lines and fit new filters before start-up.

Part Numbers & Cross Reference

Kubota (earlier number) 15241-51080

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

Does Kubota 15381-51010 fit both the B6100 and the B7100?

Yes. Kubota lists it for the B6100D-P, B6100E-P, B6100HST-D, B6100HST-E, B7100D-P, B7100HST-D and B7100HST-E. The B6100 runs the 3-cylinder D650 and the B7100 runs the 3-cylinder D750.

Does the old-type or new-type B7100HST serial range change the pump?

No. 15381-51010 is listed for both the old-type and new-type serial ranges of the B7100HST-D and B7100HST-E, so that serial split does not change the pump.

What older number does 15381-51010 replace, and is it new?

It replaces the older Kubota 15241-51080. It is a new genuine Kubota injection pump assembly, not a rebuild, and no core charge is added.

Can 15381-51010 be used on a Kubota other than the B6100 or B7100?

This pump is listed only for B6100 and B7100 models. For any other machine or engine, send us the Kubota number on your old pump and the engine model and serial. As an authorized Kubota dealer we check it at no charge before anything ships; the number is 530-668-0818.

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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.