Kubota D1803-CR Common Rail Gasket | Genuine Kubota 1J800-50520
This is the genuine Kubota common rail gasket, part number 1J800-50520. Kubota’s parts book for the D1803-CR-TIE4B shows 2 per rail on the common rail page, with rail 1J804-50603 (from serial 7MY0001).
Order two for one rail.
Confirm Fitment Before You Order
The engines named on this page are the ones whose Kubota parts books we have checked. For any other engine, send us the engine model and serial number and we will read the part off the Kubota parts list. Call 530-668-0818 and we will confirm the exact match at no charge before anything ships.
Specifications
| Part number | 1J800-50520 |
| Brand | Kubota |
| Condition | New, genuine, in original packaging |
| Warranty | Kubota genuine parts warranty: 1 year against defects in materials or workmanship. |
| Type | Common Rail Gasket |
| Kubota name | GASKET |
| Used with | Kubota common rail 1J804-50603 |
| Engines | Kubota D1803 common rail |
| Quantity | Two per rail |
| Replaces | Kubota 1J800-50521 |
Fits / Applications
- Kubota D1803-CR-TIE4B, serial 7MY0001 and up: 2 per rail
- Other Kubota engines: send us the engine model and serial number and we will check the parts list
Clean both sealing faces before you fit it, and tighten to the figure in the Kubota workshop manual for your engine.
Part Numbers & Cross Reference
Kubota 1J800-50520. Our Kubota distributor’s parts system lists it as the replacement for Kubota 1J800-50521.
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
How many do I need?
Two per rail.
Why two?
Kubota’s parts book shows two of these gaskets at the rail.
Does it replace 1J800-50521?
Our Kubota distributor’s parts system lists 1J800-50520 as the replacement for 1J800-50521.
My engine is not named here. Will it fit?
Send us the engine model and serial number and we will read the part off the Kubota parts list for that engine.
Related Parts
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 we check the part number against your engine serial or machine model before anything ships, so the right part arrives the first time. See our Kubota engine sales, parts and service.
UPS to all 50 states, including Alaska and Hawaii. Your rate shows at checkout. Questions on fitment? Call 530-668-0818.
Pricing covers the unit itself. Any applicable sales tax is additional; shipping is calculated at checkout. Buying tax-exempt? Qualifying diesel repair shops, fleets, farms, and agricultural operations can purchase tax-free. Set up tax-exempt purchasing once and every qualifying order is tax-free going forward.
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