Kubota SCV Suction Control Valve Kit 1J500-50550 (Genuine)

Genuine Kubota suction control valve kit, Kubota catalog description VALVE,KIT(SCV), part number 1J500-50550. This is the Denso-built compact SCV for the Denso HP3-type common rail supply pump on Kubota V3307-CR-TE4 and V3800-CR Tier 4 diesel engines, and the kit ships complete with the valve, two mounting bolts, and the o-ring, so the pump goes back together with fresh hardware. The SCV meters the fuel entering the pumping chambers of the supply pump, which is how the engine ECU controls rail pressure. When the valve sticks or wears, rail pressure control falls apart: hard starting, surging at idle, low rail pressure fault codes, derate, power loss, and stalling under load are the classic complaints. Valley Fuel Injection is an authorized Kubota dealer and a full common rail repair shop, so we can supply the correct new valve and help you confirm the diagnosis before you spend the money.

Application & Fitment

Kubota lists 1J500-50550 on the supply pump group for two common rail engine families, and both appear on the OEM parts diagrams:

• V3307-CR-TE4 with supply pump 1J770-50504, shown on the SVL75-2 supply pump diagram
• V3800-CR-TE4 and V3800-CR-TI with supply pumps 1J500-50504 and 1J500-50505 (serial break 2LW0001 and up), shown on the SVL90-2 supply pump diagram
• V2607-CR engines are also covered on Denso reseller listings for this valve

Dealer fitment lists for this SCV run to roughly 200 Kubota machines. The ones we see most often:

• Compact track loaders: SVL75-2 and SVL90-2
• Skid steers: SSV65 and SSV75
• Compact excavators: KX057-4 and KX080-4, with the KX057-5, KX080-4S, and KX080-4S2 on reseller lists
• Tractors: M6060, M7060, M8560, and M9960 in all their HD, HDC, and HF variants, plus dealer listings for the V6108-powered M100GX through M135GX and the M6 and M7 series
• Wheel loaders: R530, R540, R630, and R640 on reseller lists

Just as important is what this valve does not fit. The SVL95-2S, SVL97-2, M5-091, and M5-111 use the later 1J508-series supply pump, and the OEM parts diagrams for that pump show no separate SCV line item, so 1J500-50550 is not the fix there. Kubota fitment can also change by serial number within a model run, so have your engine model and serial number ready and we will verify the correct part against the Kubota parts system before it ships. Our Kubota engine sales, parts, and service page covers everything else we stock for these engines.

Cross-Reference Part Numbers

Denso parts resellers publish Denso 294200-2760 as the manufacturer number for this Kubota kit, and you will also see the Kubota number written without the hyphen as 1J50050550. Automotive listings attach several other numbers to the 294200-2760 valve, but those crosses are not published for Kubota equipment, so if you are working from a Caterpillar, Isuzu, or other Denso number, call us and we will cross it properly against your engine serial number.

Frequently Asked Questions

What are the symptoms of a bad SCV on a Kubota V3307 or V3800?

Long cranking or hard starting, rough running or surging at idle, low rail pressure trouble codes, derate or limp mode, and stalling under load. The same complaints can also come from a worn supply pump, a restricted fuel supply, or leaking injectors, so it pays to test before throwing parts at the machine. Our diesel fuel injection shop can pinpoint the cause, and if the supply pump itself is worn we can handle it through our mail-in rebuild service.

What is included in the 1J500-50550 kit?

The genuine Kubota kit includes the Denso-made suction control valve, two mounting bolts, and one o-ring. This is a new genuine part supplied by Valley Fuel Injection as an authorized Kubota dealer. Cheap lookalike SCVs are everywhere online and are a frequent cause of repeat rail pressure problems; the genuine valve costs more up front and saves you the second repair.

Does 1J500-50550 fit the SVL95-2S or the M5-091 and M5-111?

No. Those machines use a later generation supply pump in the 1J508 series, and Kubota’s parts diagrams service that pump as a complete assembly with no separate SCV line item. If one of those machines has rail pressure trouble, call us with the serial number and we will walk you through the right repair path instead of selling you a valve that will not fit.

Why Buy From Valley Fuel Injection

Valley Fuel Injection & Turbo in Woodland, California has specialized in diesel injection since 1993. We are an authorized Kubota dealer with a full common rail test shop, so the people selling you this valve are the same people who diagnose and repair these fuel systems every day. If a new SCV does not solve the problem, we can test the supply pump and injectors and get the whole system right. Learn more about our Kubota parts and service and common rail system repair capabilities.

Call 530-668-0818 for pricing and availability, or contact us online. Please have your engine model and serial number ready so we can verify fitment before this part ships.