Kubota 1G639-52035 is the new, genuine 12 V electric fuel lift pump that replaces the earlier numbers 1G639-52030, 1G639-52033 and 1G639-52034. Kubota lists it for the B3350 (HSD, HSDC and SUHSD) and for the LX3310, LX3520 and LX4020 tractors. It is also listed for some builds of the D722, D1105, D1803, V1505, V2203, V2403, V3600 and V3800 engines.

When this pump fails the engine may crank but not start, start and then die, or lose power under load. Before replacing it, check for 12 V and a good ground at the pump connector with the key on, and check the fuel filter and the tank strainer.

Specifications

Fits / Applications

• Kubota B3350HSD, B3350HSDC and B3350SUHSD tractors
• Kubota LX3310HSD and LX3310HSDC tractors
• Kubota LX3520DTN, LX3520HSD, LX3520HSDC and LX3520SUHSDC tractors
• Kubota LX4020HSD and LX4020HSDC tractors
• Some builds of Kubota D722, D1105, D1803, V1505, V2203, V2403, V3600 and V3800 engines

Mount the pump in the same position and flow direction as the old one. Check power and ground at the connector, fit a new fuel filter, and turn the key to ON for a few cycles to let the pump purge air before cranking.

Part Numbers & Cross Reference

Kubota (current) 1G639-52035  ·  Kubota (replaced) 1G639-52034  ·  Kubota (replaced) 1G639-52033  ·  Kubota (replaced) 1G639-52030

Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.

Frequently Asked Questions

Does 1G639-52035 replace 1G639-52034?

Yes. 1G639-52035 is the current Kubota number. It replaces 1G639-52030, 1G639-52033 and 1G639-52034.

Which Kubota tractors use the 1G639-52035 electric lift pump?

Kubota lists it for the B3350HSD, B3350HSDC and B3350SUHSD, the LX3310HSD and LX3310HSDC, the LX3520DTN, LX3520HSD, LX3520HSDC and LX3520SUHSDC, and the LX4020HSD and LX4020HSDC.

Will 1G639-52035 fit my D1105, V2203 or V2403 engine?

Only some builds. Kubota lists it for some D722, D1105, D1803, V1505, V2203, V2403, V3600 and V3800 engines, but many Kubota engines in this size range use a mechanical lift pump instead. Call 530-668-0818 with the engine model and serial number and we will check your build at no charge.

What should I check before replacing the lift pump on a B3350 or LX3520?

When this pump fails the engine may crank but not start, start and then die, or lose power under load. Before replacing it, check for 12 V and a good ground at the pump connector with the key on, and check the fuel filter and the tank strainer.

Related Parts

• Kubota L3200, L3400, L3800, L4600, MX5100 & M5140 Mechanical Fuel Lift Pump | Genuine Kubota 1G896-52030
• Kubota RTV-X1100C, X1120, X1130 & X1140 Mechanical Fuel Pump | Genuine Kubota 1G910-52033
• Kubota Z482, D722 & D782 Mechanical Fuel Lift Pump (B7300, B7400, B7410) | Genuine Kubota 15821-52030
• Kubota D1803-CR & V2403-CR Mechanical Fuel Feed Pump (KX040-4, U48-5) | Genuine Kubota 1J801-52030

Why Buy From Valley Fuel Injection

We are an authorized Kubota dealer and a diesel fuel-injection shop in Woodland, CA, working on diesel engines since 1993. When you call, you talk to people who know Kubota engines and can help you match the part number to your engine serial or machine model before you order. See our Kubota engine sales, parts and service.