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Caterpillar 3E-6455 is the engine oil pressure switch with a brass threaded body and a three wire lead to a sealed plug. It is used on Caterpillar 320B and 330B excavators. 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 | Oil Pressure Switch |
| Replaces | Caterpillar 3E-6455 |
| Fits | Caterpillar 3306, 3406 and 3412C engines, including 320B, 322B, 325B, 330B and 345B excavators and 950G and 962G wheel loaders |
| Condition | New, aftermarket |
| Stat. HS-Code | 853650 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 3E-6455(SPM-HEP-4489) | Caterpillar 3306, 3406 and 3412C engines, including 320B, 322B, 325B, 330B and 345B excavators and 950G and 962G wheel loaders |
Machine will not start or power up
A worn key or selector switch is a common cause of no-start faults once the batteries and fuses check out.
Intermittent faults
Switches that have to be held or jiggled will fail completely soon. Replacing them is a quick job.
Water and dirt
Cab and dash switches take water and dust. A corroded switch is cheaper to replace than to chase.
Fleet spares
A spare switch for each machine type keeps a machine working instead of waiting for parts.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (3 aftermarket sellers) | USD 55.16 to 65.28 | 30 Oct 2026 |
| aftermarket.express | USD 64.74 | 3 Nov 2026 |
| GT Engine Parts | USD 65.25 | 3 Nov 2026 |
| FridayParts | USD 165.90 | 30 Oct 2026 |
| SINOCMP | USD 198.00 | 30 Oct 2026 |
| Spare Part Mart | USD 44.62 | Today |
Our price of USD 44.62 is 19% to 77% 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.
Yes, it was made for the Caterpillar 3306, and 9 more listed under compatible equipment. Check the old switch is marked 3E-6455 or one of the cross references, because makers change parts between serial ranges.
On the Caterpillar 3306, there is no fixed interval. It is changed when it fails, and many fail from water in the plug or chafed wiring rather than wear.
A fault code for this circuit, readings that jump or stay fixed, or a part that does not respond with power at the plug.
Yes. Many machines have 12 V and 24 V versions of the same switch. Check the old part or the machine plate before fitting.
A little dielectric grease keeps water out of the plug on machines that work outside. Make sure the terminals are clean and tight first.
No. It is an aftermarket switch made to replace the Caterpillar 3E-6455. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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