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SPM-HEP-4242 is the 24 volt gear reduction starter motor with 10 tooth pinion, solenoid and mounting flange. It is used on Caterpillar 3056 and C4.4 engines. It replaces Caterpillar 225-3150, Perkins 2873K406 and Denso 428000-1120. This aftermarket part 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 | Starter Motor |
| Replaces | Caterpillar 225-3150 |
| Voltage | 24 V |
| Rated power | 4.5 kW |
| Pinion | 10 teeth |
| Cross references | Perkins 2873K406, Denso 428000-1120 |
| Fits | Caterpillar 3056, C4.4 and C6.6 engines |
| Condition | New, aftermarket |
| Stat. HS-Code | 851140 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 225-3150(SPM-HEP-4242) | Caterpillar 3056, C4.4 and C6.6 engines |
| Brand | Part No. |
|---|---|
| Caterpillar | 225-3150 (this page, SPM-HEP-4242) |
| Perkins | 2873K406 |
| Denso | 428000-1120 |
All of these numbers are the same part.
| Brand | Part No. |
|---|---|
| Caterpillar | 225-3150 (this page, SPM-HEP-4242) |
| Perkins | 2873K406 |
| Denso | 428000-1120 |
All of these numbers are the same part.
Slow or no cranking
With good batteries and cables, a starter that turns slowly or only clicks is worn.
Grinding on engagement
Worn pinion or flywheel teeth grind on start. Check the ring gear when fitting a new starter.
Intermittent starting
Worn brushes and solenoid contacts make starting hit and miss.
Fleet spares
A spare starter keeps a machine working while the old one is rebuilt or scrapped.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| Wagendass | USD 164.89 | 25 Oct 2026 |
| G&T Engine Parts | USD 248.95 | 25 Oct 2026 |
| eBay (3 aftermarket sellers) | USD 294.14 to 932.37 | 25 Oct 2026 |
| Spare Part Mart | USD 131.91 | Today |
Our price of USD 131.91 is 20% to 86% 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 225-3150. It is not made by or affiliated with Caterpillar; the Caterpillar part number is used only to show what it replaces.
It fits Caterpillar 3056, C4.4 and C6.6 engines. 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.
Prices depend on your ZIP or postcode.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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Join Marty Mates and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that.
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