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Caterpillar 266-1477 is the rotary throttle position sensor with two mounting holes and a short lead to a Deutsch style plug. It is used on Caterpillar machines. 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 | Throttle Position Sensor |
| Replaces | Caterpillar 266-1477 |
| Sensor type | Rotary throttle position sensor |
| Mounting | Two hole flange |
| Connector | Deutsch style plug on a short lead |
| Fits | Caterpillar 320D excavators, 950G, 962G, 966G, 972G, 980G and 980H wheel loaders, D6N track-type tractors and 825G and 826G compactors |
| Condition | New, aftermarket |
| Stat. HS-Code | 903289 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 266-1477(SPM-HEP-4081) | Caterpillar 320D excavators, 950G, 962G, 966G, 972G, 980G and 980H wheel loaders, D6N track-type tractors and 825G and 826G compactors |
Engine will not rev or stays at low idle
A failed throttle position sensor sends no pedal or lever signal, so the engine controller holds idle. Check the fault codes first.
Surging or erratic engine speed
A worn sensor track gives a jumpy signal and the engine speed hunts. A new sensor gives a clean signal again.
Fitting tips
Unplug the old sensor, fit the new one in the same position on its pedal or lever, plug it in and check the full travel on the service display.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| DeedParts | USD 87.13 | 23 Oct 2026 |
| SINOCMP | USD 89.00 | 23 Oct 2026 |
| FridayParts | USD 110.25 | 23 Oct 2026 |
| Spare Part Mart | USD 71.20 | Today |
Our price of USD 71.20 is 18% to 35% 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 266-1477. It is not made by or affiliated with Caterpillar; the Caterpillar part number is used only to show what it replaces.
It fits Caterpillar 320D excavators, 950G, 962G, 966G, 972G, 980G and 980H wheel loaders, D6N track-type tractors and 825G and 826G compactors. 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.
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