4 Pcs Fuel Injector A140830 for CASE 336B 336D 504BD 301BD 451BD Engine 850B 870 800 825 300C 400C W14H W24B
This fuel injector is engineered as a direct replacement for the CASE 336B 336D 504BD 301BD 451BD Engine 850B 870 800 825 300C 400C W14H W24B. 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 |
|---|---|
| 4 Pcs Fuel Injector A140830 for CASE 336B 336D 504BD 301BD 451BD Engine 850B 870 800 825 300C 400C W14H W24B Condition: New Aftermarket PartNote: For the new aftermarket part, we advise you replace the whole set together, Because the oil output and atomization concentration of Genuine and aftermarket parts are different, they cannot be mixed to work for the same engine. Replace Part Number:A140830, A59092, A64439, A140838, 20669, 18366, 19792, 20346, 20676 Fit for Engine: CASE 336B, 336D, 336DT, 504BD, 504DT, 301BD, 451BD, 336BD, 336BDT Applications:Fit for following models:CASE Tractor: 850B, 870CASE Wheel Loader: 300C, 400C, 600, 800, 825, W14, W14FL, W14H, W24B, W24, W24C, 680E, 680G, 780 CASE Cable Layer: 475 | See product specifications |
Replaces OEM Part Numbers
A140830 • A59092 • A64439 • A140838 • 20669 • 18366 • 19792 • 20346 • 20676 • Engine • 336DT • 504BD
Signs You Need a Replacement
If your equipment is showing any of these symptoms, the injectors & nozzle may be the cause:
- Rough idle or misfire — Uneven fuel delivery from a worn injector causes the engine to shake at idle. On engines, this is often accompanied by a knocking sound under load.
- Black or white exhaust smoke — Black smoke means excess fuel; white smoke indicates incomplete combustion. Both point to injector spray pattern degradation.
- Loss of engine power — A single failing injector reduces cylinder output. Multi-cylinder engines lose noticeable power when one injector flows less than the rest.
- Increased fuel consumption — Poor atomization means the engine burns more fuel to produce the same power. Monitor your fuel burn rate as an early warning sign.
- Hard starting or no start — If the injector doesn’t deliver fuel on cranking, the cylinder won’t fire. This is especially common in cold weather with worn nozzles.
- Fuel in engine oil (dilution) — Fuel leaking past the injector seat seal contaminates the crankcase oil. If the oil level rises or smells of diesel, inspect the injectors immediately.
Replace as a Set
Replace all injectors as a set whenever possible. On engines, mixing old and new injectors creates uneven fuel delivery — the new injectors compensate for the worn ones, shortening their life. When installing, use new copper sealing washers and torque to the specification in the service manual. After installation, run the engine at idle for 5 minutes to bleed air from the fuel system, then check for leaks at each injector connection before putting the machine under load.
Frequently Asked Questions
Can I cross-reference A140830 with A59092?
Yes. Both A140830 and A59092 are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions.
This listing is for 4 pieces – do I need to buy a full set?
This listing includes 4 units. For best results, replace all injectors at the same time rather than one at a time. Mixing old and new units causes uneven fuel delivery and shortens the life of the new parts.
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