Genuine Kubota Fuel Injection Pump 1G006-51012 for D902 Diesel Engines

The 1G006-51012 is the genuine Kubota fuel injection pump assembly (Kubota catalog description: ASSY PUMP, INJECTION) for the D902 diesel engine, and it is the current factory part number sold through Kubota’s official parts system. The D902 is the 0.9 liter three cylinder diesel that powers a wide range of Kubota mini excavators and compact machines, and this mechanical pump meters and times fuel delivery for all three cylinders. Valley Fuel Injection is an authorized Kubota dealer, so you get the real Kubota pump, new in the box, with full factory backing.

A failing injection pump on a D902 usually shows up as hard starting, excessive smoke, rough idle, low power, or a fuel knock that will not go away. Because pump calibration controls both fuel quantity and timing, installing a genuine calibrated unit restores factory fuel delivery in one step. If you want the fuel system diagnosed before you spend money on parts, our in house diesel fuel injection shop has been testing and calibrating Kubota pumps and injectors since 1993.

Application & Fitment

Confirmed engine application:

• Kubota D902 diesel engine

Aftermarket listings also pair this pump with the Kubota D782, and they list the following Kubota machines. Treat these as probable until verified against your serial number:

• K008-5 mini excavator
• KX018-4 excavator
• KX41-3 excavator
• U10-5 excavator
• U15 excavator
• U17 excavator
• SCL1000 stand-on compact track loader

Kubota used more than one injection pump across the D782 and D902 production run, so the only way to guarantee fitment is the engine serial number. Send us your engine model and serial number and we will confirm the exact pump against the Kubota parts catalog before you order. We can also verify fitment for D902 engines installed in non Kubota equipment through our Kubota engine sales, parts, and service department.

Cross-Reference Part Numbers

• 1G006-51010 (earlier version, listed together with 1G006-51012 by multiple sellers)

One caution: do not confuse this pump with the older 16006-51012 (Zexel 104205-3072) used on earlier D722 and D902 engines. Despite the similar number, that is a different pump, and we have found no Kubota documentation superseding it to 1G006-51012. If your parts book shows 16006-51012, call us first and we will sort out which pump your engine actually needs.

Frequently Asked Questions

How do I confirm 1G006-51012 fits my engine?

Fitment always comes down to the serial number. The D902 application is confirmed by multiple independent sources and this is the current number in Kubota’s official parts system, but Kubota built several pump variants for this engine family. Call us at 530-668-0818 with your engine model and serial number, or your machine model and serial number, and we will verify the correct pump before you buy.

Does 1G006-51012 replace 1G006-51010?

Multiple listings show 1G006-51010 as an earlier version of this pump, and 1G006-51012 is the number currently sold through the Kubota parts system. We will confirm the correct current part number for your specific serial number at no charge before anything ships.

Is there anything special about installing this pump?

Take care with injection timing. The pump seats into the crankcase on a shim pack, so keep the original shims in place unless the crankcase or camshaft has been changed. Use new sealing hardware, and note that installers have reported a separate capture bolt, Kubota T2555-44591, being required on some installations, so check your parts diagram before you start. If you would rather not gamble, our injection shop installs and times these pumps regularly and can test your old unit to confirm the diagnosis.

Why do I see this pump cheaper online?
Short answer: it is usually not the same part — and a pump failure does not stay in the pump. Read why ↓

Search any OE number and eBay, Amazon and a dozen storefronts will show it well under dealer cost, sold by outfits with no name, no address and no phone number. We lose business to those listings every week — and we see a lot of them come back through our shop. Here is what is actually different.

• The part number proves nothing on its own. Counterfeit injectors and pumps are stamped with the same OE numbers as the real thing, in housings cast to look identical. The number in the listing title tells you what the seller claims it is, not what came off an OE line.
• “Remanufactured” is not a regulated word. A genuine reman unit is stripped to bare components, has its wear parts replaced — nozzle, plunger and barrel, solenoid, seals — and is then run on a calibration bench until it meets the original flow and response spec. A cheap one is very often cleaned, resealed, painted and shipped. Both get called remanufactured.
• No full teardown, so no idea what is worn. A proper rebuild means the unit comes apart completely and every part gets inspected and measured against spec — not just the ones that are obviously bad. Skip the teardown and you are reusing worn internals inside a freshly painted housing. It will run on the truck. It will not last.
• No factory-spec bench load testing. A unit is not finished until it has been run under load on a test bench and made its numbers across the range, not just at one easy point. That bench time is most of what you are paying for. Sellers working on price cut it first, because nobody can see it in a photo.
• The warranty has to be honored by someone. Everything we remanufacture in house carries a one-year warranty, with 30 days on electrical components. Parts we supply as an authorized dealer carry the manufacturer’s own warranty. Either way you call us, a real shop in California, and we sort it out. A marketplace warranty usually means shipping the part overseas at your own cost and hoping for a reply.
• No core program. We credit your rebuildable core back in full. Discount sellers generally will not take one, so the gap narrows the moment you account for the core you are now stuck holding.
• A pump failure does not stay in the pump. When a high-pressure pump comes apart it sends metal downstream through the rails, the lines and every injector. That is the whole reason fuel contamination kits exist. A pump that was never tested to spec is the cheapest possible way to buy that repair.

We are an authorized dealer and a working fuel-injection shop — we have been rebuilding and testing this hardware in Woodland since 1993, and the people who answer the phone are the people who run the benches. Not sure this is the right part for your engine? Call us with your serial number before you order and we will confirm it. Send your rebuildable core back and the core charge is refunded. And if a price somewhere else looks too good, call 530-668-0818 and we will tell you straight whether it is a deal or a problem.

Why Buy From Valley Fuel Injection

Valley Fuel Injection & Turbo in Woodland, California has specialized in diesel injection since 1993. As an authorized Kubota dealer we sell only genuine Kubota parts with factory warranty, never gray market or copy pumps. The people answering our phones are the same technicians who test, calibrate, and rebuild diesel injection pumps every day, so you get straight fitment answers, not guesses. See our Kubota engine parts and service page for everything else we stock for the D902 family.

Pricing & Availability

Call 530-668-0818 for current pricing and availability on the genuine Kubota 1G006-51012 injection pump. Have your engine model and engine serial number ready and we will verify fitment on the spot. Prefer to write? Contact us here and we will reply with a quote and confirmed fitment.