Fuel injector Sleeve RE543935 RE517435 for John Deere Engine 4045 6068 6090 9540WTS S660 S760 T660 1510E 670C 8100 9970 6420 6820 8230 6R 110 8400R
This fuel injector is engineered as a direct replacement for the John Deere Engine 4045 6068 6090 9540WTS S660 S760 T660 1510E 670C 8100 9970 6420 6820 8230 6R 110 8400R. 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 |
|---|---|
| John Deere Engine 4045 6068 6090 9540WTS S660 S760 T660 1510E 670C 8100 9970 6420 6820 8230 6R 110 8400R Replacement Part Number: RE543935, RE517435 Fit for | See product specifications |
| John Deere Combine:9540i WTS, 9540WTS, 9560 STS, 9560i STS, 9560i WTS, 9560WTS, 9580i WTS, 9580WTS, 9660 STS, 9760 STS, C2 300, HILLMASTER, S440, S540, S550, S660, S670, S670HM, S7 600, S7 700, S760, S770, T550, T560, T660, T670, W1 100, W540, W550, W650, W660Fit for Crawler Dozer: 850JFit for | See product specifications |
| John Deere Forwarder: 1510E, 1710D, 1711D, 1910E, 1910GFit for | See product specifications |
| John Deere Motor Grader: 670C, 670CH, 672CH, 770G, 770GP, 772G, 772GP, 870G, 870GP, 872G, 872GPFit for | See product specifications |
| John Deere Harvester: 8100, 8200, 1070E, 1170E, 1270E, 1270G, 1470D, 1470GFit for | See product specifications |
| John Deere Sprayer: 4730, 4940, 332M, 340M, MAZZOTTI, R4140I, R4150IFit for | See product specifications |
| John Deere Picker Cotton: 9970Fit for | See product specifications |
Replaces OEM Part Numbers
RE543935 • RE517435 • Deere • Engine • 4045HAC04 • 4045HAC05 • 4045HFG06 • 4045HFK04 • 4045HFL07 • 4045HFL09 • 4045HL070 • 4045HL072
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 John Deere 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 John Deere 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
Will this fit my John Deere 4045?
Yes. This part is designed to fit the John Deere 4045, 6068, 6090, S660 among other models listed in the compatibility table above. Verify your specific model and engine code before ordering to ensure the correct fit.
Can I cross-reference RE543935 with RE517435?
Yes. Both RE543935 and RE517435 are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions.
What are the common failure signs on a John Deere engine?
On John Deere engines, watch for black exhaust smoke under load, rough idle, misfire codes (P0300 series), and loss of power. A single failing injector can reduce engine output by up to 25%. If you notice fuel in the engine oil, the injector seat seal is likely compromised.
What tools do I need to install this on a John Deere?
Standard metric hand tools will handle most of the job – sockets, wrenches, and a torque wrench. For John Deere equipment, check the specific service manual for any special tools or torque values.
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