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Caterpillar 4N3890 is the 12 volt shutoff solenoid with mounting flange, plunger and POS, NEG and AUX screw terminals. It is used on Caterpillar 3306 and 3406 engines. This aftermarket version has the same mounting and electrical connector as the original, so it plugs in and bolts on where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Fuel Shutoff Solenoid 12V |
| Replaces | Caterpillar 4N3890 |
| Voltage | 12 V |
| Terminals | POS, NEG and AUX screw terminals |
| Fits | Caterpillar 3304, 3306, 3406, 3408, 3412, C15 and C18 engines, including D6C tractors and 637D scrapers |
| Condition | New, aftermarket |
| Stat. HS-Code | 850590 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 4N3890(SPM-HEP-4397) | Caterpillar 3304, 3306, 3406, 3408, 3412, C15 and C18 engines, including D6C tractors and 637D scrapers |
Engine will not start or will not stop
A failed fuel shutoff solenoid holds the fuel off (no start) or will not cut it (no stop). Check power at the plug first.
Engine cuts out
A weak pull-in or hold coil lets the solenoid drop out under vibration and the engine stalls.
Sticking plunger
Dirt and corrosion stop the plunger moving freely. Replacing the solenoid is quicker than freeing an old one.
Fleet spares
A spare solenoid on the van turns a no-start into a quick fix on site.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| FridayParts | USD 58.78 | 25 Oct 2026 |
| eBay (6 aftermarket sellers) | USD 64.00 to 82.78 | 25 Oct 2026 |
| MyMROmarts | USD 120.84 | 25 Oct 2026 |
| Spare Part Mart | USD 47.02 | Today |
Our price of USD 47.02 is 20% to 61% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
No. It is an aftermarket part made to fit in place of Caterpillar 4N3890. It is not made by or affiliated with Caterpillar; the Caterpillar part number is used only to show what it replaces.
It fits Caterpillar 3304, 3306, 3406, 3408, 3412, C15 and C18 engines, including D6C tractors and 637D scrapers. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.
It has the same mounting and electrical connector as the original. Check the plug and terminals match your old part, and test it before putting the machine back to work.
Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.
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