3 Cylinder Injector Seal Kit for Kubota Engine D750 D850 D950
This injector seal kit is engineered as a direct replacement for the Kubota Engine D750 D850 D950. Manufactured to meet or exceed OEM specifications, it delivers reliable performance in demanding conditions. Each unit is tested for fuel flow, pressure rating, and durability before leaving the factory to ensure consistent quality across every order.
Vehicle Compatibility
| Application | Details |
|---|---|
| Kubota Engine D750 D850 D950 Engine Specification: Cylinders: 3Valves: 6Engine Stroke: 70mmEngine Type: Indirect Inject Fit for | See product specifications |
| Kubota Engine:D750, D850, D950 Content:3 X Copper Washers (goes on Bottom of injector and seals to the head )3 X Aluminum Return Line Washers (goes on top of the injector then the fuel return rail then the nut) | See product specifications |
Signs You Need a Replacement
If your equipment is showing any of these symptoms, the injectors & nozzle may be the cause:
- Fuel leak at injector base — Copper washers lose their crush seal over time. If you see dampness around the injector, the seals need replacement.
- Fuel in coolant or oil — A failed combustion seal allows fuel pressure to escape into adjacent passages. This is a serious issue that requires immediate attention.
- Loss of compression on one cylinder — When the copper sealing washer fails, combustion gases blow past the injector body instead of pushing the piston.
Installation Notes
Clean the injector bore thoroughly before installing new seals. Any carbon or debris left in the bore prevents the copper washer from seating properly, causing a compression leak. Use a wire brush or bore cleaning tool, then wipe with a lint-free cloth. Install the seals in the order specified in the kit — the heat shield goes on first, then the copper washer, then the O-rings. Torque the injector to the specified value and recheck after running the engine under load.
Frequently Asked Questions
Will this fit my Kubota D750?
Yes. This part is designed to fit the Kubota D750, D850, D950 among other models listed in the compatibility table above. Verify your specific model and engine code before ordering to ensure the correct fit.
Do I need to replace the seals when removing injectors?
Yes. The copper sealing washers are single-use – they crush to form the seal and cannot be reused. Rubber O-rings harden over time from heat and fuel exposure. Even if the old seals look fine, they won’t seal properly on reassembly.
What tools do I need to install this on a Kubota?
Standard metric hand tools will handle most of the job – sockets, wrenches, and a torque wrench. For Kubota equipment, check the specific service manual for any special tools or torque values.
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