Kubota V3307-CR-TE4 Fuel Injector Kit 1J770-53075 (Genuine)
Kubota 1J770-53075 Fuel Injector Kit | Genuine Common Rail Injector for V3307-CR-TE4
The Kubota 1J770-53075 is the current genuine Kubota “INJECTOR, KIT” for the V3307-CR-TE4 common rail turbo diesel. The kit includes a new Denso common rail injector (Denso 295050-1980) with the O-rings and seals needed for a clean, leak-free installation. It is the factory replacement for the entire earlier 1J770 injector line, so if your parts book shows 1J770-53050, 1J770-53051, 1J770-53053, 1J770-53070, 1J770-53073, or 1J770-53074, this is the number Kubota supplies today.
Valley Fuel Injection is an authorized Kubota dealer and a diesel injection specialist shop since 1993. We do not just sell injectors, we test, diagnose, and repair complete common rail systems every day through our diesel fuel injection services, so we can help you confirm the injector is actually the problem before you spend the money.
Application & Fitment
This injector kit fits the Kubota V3307-CR-TE4, the 3.3 liter Tier 4 common rail turbo diesel used across Kubota’s mid-size construction and tractor lineup. The same injector is used in the Caterpillar C3.3B, which is the CAT-branded version of this Kubota engine, under CAT part numbers 436-1096 and 608-2959.
Kubota equipment applications:
- SVL75-2, SVL75-2C, SVL75-2CA compact track loaders
- SSV75, SSV75C, SSV75P, SSV75PC skid steer loaders
- KX080-4 and KX080-4S excavators
- M6060HD, M6060HDC, M6060HFC tractors
- M7060HD, M7060HD12, M7060HDC, M7060HDC12, M7060HFC tractors
- M4-071HDC12, M4D-061HDC12, M4D-071HDC12 tractors
CAT C3.3B applications (same injector via CAT crosses 436-1096 / 608-2959):
- 236D through 289D and D3 series skid steer and compact track loaders
- 308E2 CR and 308E2 SR mini excavators
- 906M, 907M, 908M compact wheel loaders
- AP300F and AP355F asphalt pavers
Injector part numbers change with engine serial number breaks. If you are not certain which kit your machine takes, call us with your engine model and serial number and we will verify fitment before you order.
Cross-Reference Part Numbers
Kubota 1J770-53075 replaces or interchanges with the following numbers:
- Denso 295050-1980 (also listed as 241-102-0030 / 2411020030)
- Caterpillar 436-1096 and 608-2959 (C3.3B engine)
- Kubota 1J770-53050, 1J770-53051, 1J770-53052, 1J770-53053
- Kubota 1J770-53070, 1J770-53073, 1J770-53074
- Kubota 1J778-53051 and 1J778-53073
- Kubota remanufactured KEARI-1J770
- Denso 295050-1320 (earlier variant listed as compatible)
Frequently Asked Questions
Does 1J770-53075 replace my older Kubota injector part number?
Yes. Kubota has superseded this injector several times, and 1J770-53075 is the current factory number. It replaces 1J770-53050, 1J770-53051, 1J770-53052, 1J770-53053, 1J770-53070, 1J770-53073, and 1J770-53074. If your old injector or parts diagram shows any of those numbers, this is the correct kit to order today.
Should I replace one injector or all four?
It depends on hours and fuel history. When an injector fails from contaminated fuel, water, or debris, the remaining three have usually been exposed to the same conditions. As a full injection shop we can test your injectors, inspect the supply pump and rail, and tell you honestly whether one kit or a full set makes sense. See our common rail system repair service, or call us and we will talk it through, including set pricing if you need all four.
My machine is a CAT, not a Kubota. Will this injector fit?
If your machine runs the Caterpillar C3.3B engine, yes. The C3.3B is a Kubota-built engine, and this same injector is sold by CAT as 436-1096 and 608-2959. That covers the D-series and D3 skid steers and track loaders (236D through 289D), 308E2 CR/SR mini excavators, 906M/907M/908M wheel loaders, and AP300F/AP355F pavers. Give us your engine serial number and we will confirm before it ships.
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.
Why Buy From Valley Fuel Injection
- Authorized Kubota dealer. Genuine Kubota parts in factory packaging, no gray-market or counterfeit risk.
- Diesel injection specialists since 1993, based in Woodland, California.
- Complete Kubota engine sales, parts, and service under one roof.
- Real diagnostic help. We repair common rail systems daily, so we can help you avoid replacing parts that are not the problem.
- Serial number fitment verification on every injector order.
Pricing & Availability
$895.00 per kit, in stock in Woodland, CA and ready to ship — ships free ground in the lower 48. Genuine Kubota injectors are sold outright, so there is no core charge. Doing all four on a V3307? Call 530-668-0818 and we will price the set and confirm the correct kit against your engine model and serial number, or contact us online and we will get back to you quickly.
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