This is a new, genuine Kubota 1J800-53710 injection pipe. It is the high-pressure line from the common rail to the No. 1 cylinder injector on Kubota’s D1803-CR 3-cylinder and V2403-CR 4-cylinder common-rail engines. Kubota counts cylinders from the gear case end of the engine. Kubota parts catalogs list it on L3301, L3302, L3560, L3901, L3902, L4060, L47, L4701, L4760, L4802, L5060, L5460 and L6060 tractors, MX4800, MX5200, MX5400, MX5800 and MX6000 tractors, the M5660SUH, M5660SUHD and M62, the KX040-4 and U48-5 excavators, and the R430 wheel loader.

Each cylinder has its own pipe shape. Kubota uses 1J800-53710 for No. 1, 1J800-53720 for No. 2 and 1J800-53730 for No. 3, and 4-cylinder V2403-CR engines add 1J800-53740 for No. 4. The pipe from the supply pump to the rail is a different part, 1J801-53750. Replace a pipe if it leaks at a fitting, has been kinked or bent out of shape, or has a damaged seat or nut.

Specifications

Fits / Applications

• Kubota D1803-CR 3-cylinder common-rail engines
• Kubota V2403-CR 4-cylinder common-rail engines
• Kubota L-series tractors: L3301, L3302, L3560, L3901, L3902, L4060, L47, L4701, L4760, L4802, L5060, L5460, L6060
• Kubota MX-series tractors: MX4800, MX5200, MX5400, MX5800, MX6000
• Kubota M5660SUH, M5660SUHD and M62
• Kubota KX040-4 and U48-5 excavators, R430 wheel loader

This is a high-pressure common-rail line. Work clean: cap the rail outlet and the injector inlet as soon as the old pipe is off, and keep the caps on the new pipe until it goes in. Refit the pipe clamps in their original places. Tighten the nuts to the value in the Kubota workshop manual, then check for leaks with the engine running and keep hands clear of any leak.

Part Numbers & Cross Reference

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

Which end of the engine is cylinder No. 1 for Kubota 1J800-53710?

Kubota counts cylinders from the gear case end of the engine. 1J800-53710 is the high-pressure line from the common rail to the injector on cylinder 1 of D1803-CR and V2403-CR engines.

Will 1J800-53710 fit a Kubota L4701 or M62?

Yes, Kubota parts catalogs list it on both. The same pipe is listed on other L-series tractors, the MX4800, MX5200, MX5400, MX5800 and MX6000, the M5660SUH and M5660SUHD, the KX040-4 and U48-5 excavators and the R430 wheel loader.

Is 1J800-53710 the pipe from the supply pump to the rail?

No. This pipe runs from the common rail to the injector. The pipe from the supply pump to the rail is a different part, 1J801-53750.

How do I make sure 1J800-53710 is the right injection pipe for my engine?

Pipes are cylinder-specific and do not swap between positions. Call 530-668-0818 with the machine model and engine serial number. We are an authorized Kubota dealer and will confirm the exact pipe at no charge before anything ships.

Related Parts

• Kubota D1803-CR & V2403-CR No. 2 Cylinder Common-Rail Injection Pipe | Genuine Kubota 1J800-53720
• Kubota D1803-CR & V2403-CR No. 3 Cylinder Common-Rail Injection Pipe | Genuine Kubota 1J800-53730
• Kubota D1803-CR & V2403-CR Common-Rail Fuel Injector | Bosch 0445110777 New (Kubota 1J801-53052)
• Kubota V2403-CR 4-Cylinder Injector Overflow Return Tube Assembly | Genuine Kubota 1J800-42500

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.