Kubota 1J770-53074 Common Rail Fuel Injector Kit for V3307-CR-TE4 (Genuine)

Genuine Kubota fuel injector kit, part number 1J770-53074, a Denso-built common-rail injector for the Kubota V3307-CR-TE4 3.3L four-cylinder turbo diesel and its Caterpillar-badged twin, the CAT C3.3B. This is the injector behind the Kubota SVL75 and SVL75-2 track loaders, SSV75 skid steers, KX080-4 excavator and a long list of CAT D-series machines. Supplied to order by Valley Fuel Injection & Turbo, an authorized Kubota dealer and diesel fuel-injection shop in Woodland, CA.

Application & Fitment

Engines:

• Kubota V3307-CR-TE4, 3.3L common-rail turbo diesel (Tier 4)
• Caterpillar C3.3B, the Kubota-built version of the same engine

Equipment applications:

• Kubota SSV75 / SSV75C skid steer loaders
• Kubota SVL75 / SVL75-2 compact track loaders
• Kubota KX080-4 excavator
• Kubota M6060HFC / M7060HFC tractors
• CAT 236D, 242D, 246D, 257D, 259D, 262D, 277D, 279D, 287D and 289D skid steer and compact track loaders (D and D3 series)
• CAT 308E2 CR, 308E2 SR, 308.5, 308, 309 and 310 mini excavators
• CAT 906M / 907M / 908M compact wheel loaders
• CAT AP300F / AP355F asphalt pavers

Please note: this injector does not fit the Kubota V2403-CR. The V2403 common-rail engine uses a Bosch fuel system with different part numbers. Not sure which engine you have? Call us with your engine serial number and we will confirm the correct injector before you order.

Cross-Reference Part Numbers

• Denso 295050-1980 (2950501980)
• Caterpillar 608-2959
• Caterpillar 436-1096
• Kubota 1J770-53050, 1J770-53051, 1J770-53052, 1J770-53070, 1J770-53071, 1J770-53072 and 1J770-53073 (earlier versions of the same injector)
• Kubota 1J770-53075 (shown by Kubota dealer listings as the later replacement number)
• Kubota 1J778-53051 / 1J778-53073 (related OE numbers that appear in some injection-shop listings, call to verify)

Frequently Asked Questions

Will this injector fit my machine?

If your machine runs the Kubota V3307-CR-TE4 or CAT C3.3B, yes. That covers the Kubota SVL75/SVL75-2, SSV75, KX080-4 and M6060HFC/M7060HFC, plus the CAT D-series loaders, 308-class mini excavators, 906M through 908M wheel loaders and AP300F/AP355F pavers listed above. It does not fit the V2403-CR, which runs a Bosch injector. The fastest way to be certain is to give us your engine serial number, and we will check it against the Kubota parts system before anything ships.

Why buy a genuine Kubota injector instead of an aftermarket copy?

A common-rail injector meters fuel at extremely high pressure, and a copy that flows even slightly off spec can cause hard starts, white smoke, rough running and eventually engine damage. The genuine 1J770-53074 kit is a new Denso injector built, flow-tested and calibrated to Kubota’s specification, and it carries genuine Kubota parts backing. Online marketplaces are full of untested copies of this part number. We rebuild and test common-rail injectors every day, and on this engine we recommend genuine.

How do I order, and what do you need from me?

Call 530-668-0818 or send a quote request with your engine model, engine serial number and machine model. We confirm fitment against the Kubota parts system, then quote current pricing, availability and lead time. Injector kits are supplied to order, and we can also advise on rail, supply pump and filter service while the injectors are out.

Why source your Kubota parts from Valley Fuel Injection

As an authorized Kubota dealer and diesel fuel-injection specialists, Valley Fuel Injection & Turbo supplies genuine Kubota engines and fuel-system components, and we rebuild the very common-rail systems these parts serve. Diesel is all we do, and we have done it across Northern California and Nevada since 1993.

Pricing & availability: this genuine Kubota common-rail fuel injector kit is supplied to order. Call 530-668-0818 or request a quote for current pricing, availability and lead time. Have your engine model and serial number ready so we can confirm the exact part for your machine.

Why do I see this common rail injector cheaper online?
Short answer: it is usually not the same part — and common rail does not forgive “close enough.” 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.
• Common rail has no tolerance for “close enough.” These injectors meter fuel in fractions of a millisecond at pressures north of 20,000 psi, across multiple events per stroke. A nozzle or control valve that is merely near spec will not throw a code on the bench at idle — it shows up as a cylinder that runs hot, a balance rate that drifts, fuel in the oil, or a rail pressure fault six months out. And the labor to go back in is the same as it was the first time.

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.