Genuine Kubota Fuel Injector Kit 1J702-53074 for V2607-CR Diesel Engines

Kubota part number 1J702-53074 is the genuine common-rail fuel injector kit for the Kubota V2607-CR-TE5-WL diesel engine, the 2.6 liter turbocharged Tier 4 Final engine used in the Kubota R640 wheel loader. It is listed in Kubota’s parts catalog as INJECTOR,KIT and is the factory injector for this engine, not an aftermarket copy. Valley Fuel Injection is an authorized Kubota dealer, so we supply the current genuine part for this position. If Kubota has superseded 1J702-53074 to a newer number, your order is filled with the latest factory-approved injector for your serial number.

Common-rail injectors on the V2607 meter fuel at extremely high pressure with very tight tolerances. A worn or sticking injector typically shows up as hard starting, white or black smoke, rough idle, fuel knock, low power, or a derate with fuel-system fault codes. Installing a genuine Kubota injector restores the factory spray pattern and flow calibration, which is what protects the piston crowns and keeps emissions equipment happy.

Application & Fitment

Confirmed applications for injector kit 1J702-53074:

• Engine: Kubota V2607-CR-TE5-WL, 2.6 liter (2,615 cc) turbocharged common-rail diesel, Tier 4 Final, rated 64.3 HP gross / 61.1 HP net in the R640
• Equipment: Kubota R640 wheel loader. This part number appears in Kubota’s official R640 injector and glow plug parts diagram.

The 1J702 prefix belongs to Kubota’s V2607 turbo common-rail injector family, so this injector may also serve other V2607T applications. Kubota fitment is serial-number specific and injector numbers changed several times during production, so send us your engine model and serial number and we will verify the correct injector for your unit before you order.

Cross-Reference Part Numbers

Kubota supersession chain for this injector position:

• Kubota 1J702-53070 (earlier number, replaced by this part)
• Kubota 1J702-53073 (earlier number, replaced by this part)
• Kubota 1J702-53074 (this part)
• Kubota 1J702-53075 (Kubota’s current replacement number; orders are filled with the latest supersession)

Denso builds the injectors for this engine family. Denso reference 295050-2910 is documented for the earlier 1J702-53050 series injectors in the same V2607T family, but it is not published against 1J702-53074 specifically, so treat that cross as family-level only. If you are matching a Denso number stamped on your old injector, call us and we will confirm the correct genuine replacement.

Frequently Asked Questions

Will this injector fit my Kubota R640 wheel loader?

Yes. Kubota’s own R640 parts diagram lists 1J702-53074 in the injector and glow plug group for the V2607-CR-TE5-WL engine. Because Kubota assigns parts by serial-number break, we still recommend giving us your loader or engine serial number when you order so we can confirm you receive the correct injector, including any current supersession.

My parts book shows 1J702-53070, 1J702-53073, or 1J702-53075. Is this the same injector?

Yes, those are the same injector position in Kubota’s supersession chain. 1J702-53074 replaced 1J702-53070 and 1J702-53073, and Kubota has since issued 1J702-53075 as the current number. Whichever of these numbers your book shows, we supply the latest genuine part that Kubota specifies for your engine.

Is this a genuine Kubota injector or an aftermarket copy?

Genuine Kubota, supplied through our authorized Kubota dealership with full factory warranty support. Common-rail injectors are precision-matched to the engine’s calibration, and low-cost copies are a frequent cause of repeat smoke, power, and derate complaints. If your V2607 has multiple injector faults or you suspect rail pressure problems, our common rail system repair shop can diagnose the whole system before you spend money on parts.

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

Valley Fuel Injection & Turbo in Woodland, CA has specialized in diesel fuel injection since 1993. We are an authorized Kubota dealer offering Kubota engine sales, parts, and service, backed by a full in-house diesel fuel injection shop. That means the people selling you this injector can also test your old ones, diagnose your fuel system, and stand behind the fix. You get genuine parts plus real technical support on the phone, not a warehouse picking orders.

Pricing & Availability

Call 530-668-0818 for current pricing and availability on Kubota injector kit 1J702-53074, or contact us online. Please have your engine model and serial number ready so we can verify fitment and any Kubota supersession before your order ships.