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Caterpillar 305-0325 is the 24 V cab air conditioning compressor (Denso 10S17C type) with a 140 mm, 8 groove poly V clutch. It is used on Caterpillar 324D to 385C excavators. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
The same part is also sold as Caterpillar 245-7779, Caterpillar 259-7243, Caterpillar 178-5545 and Denso 447260-8391.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | A/C Compressor |
| Replaces | Caterpillar 305-0325 |
| Type | Swash plate A/C compressor, Denso 10S17C type |
| Voltage | 24 V clutch coil |
| Clutch | 140 mm, 8 groove poly V (PV8) |
| Refrigerant | R134a |
| Cross references | Caterpillar 245-7779, Caterpillar 259-7243, Caterpillar 178-5545, Denso 447260-8391 |
| Fits | Caterpillar 324D; Caterpillar 325C; Caterpillar 325D; Caterpillar 330D; Caterpillar 336D; Caterpillar 345C; Caterpillar 365C; Caterpillar 385C; Caterpillar M330D |
| Condition | New, aftermarket |
| Stat. HS-Code | 841430 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 305-0325(SPM-HEP-3160) | Caterpillar 324D, Caterpillar 325C, Caterpillar 325D, Caterpillar 330D, Caterpillar 336D, Caterpillar 345C, Caterpillar 365C, Caterpillar 385C, Caterpillar M330D |
| Brand | Part No. |
|---|---|
| Caterpillar | 305-0325 (this page, SPM-HEP-3160) |
| Caterpillar | 245-7779 |
| Caterpillar | 259-7243 |
| Caterpillar | 178-5545 |
| Denso | 447260-8391 |
All of these numbers are the same part.
| Brand | Part No. |
|---|---|
| Caterpillar | 305-0325 (this page, SPM-HEP-3160) |
| Caterpillar | 245-7779 |
| Caterpillar | 259-7243 |
| Caterpillar | 178-5545 |
| Denso | 447260-8391 |
All of these numbers are the same part.
Cab not cooling
When the cab blows warm with a full refrigerant charge and a working fan, a worn compressor that no longer builds pressure is a common cause.
Clutch slipping or not engaging
A clutch that will not pull in, or slips and squeals under load, stops the compressor turning. Check the coil feed first, then the compressor.
Noise or seizure
Knocking, grinding or a locked shaft means internal failure. Replace the compressor and flush the system so debris does not reach the new one.
Fitting tips
Fit a new receiver drier and expansion valve, flush the condenser and lines, add the correct grade and amount of PAG oil, then evacuate and recharge with R134a to the machine's specification.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| FridayParts | USD 210.05 | 9 Oct 2026 |
| eBay (8 aftermarket sellers) | USD 222.95 to 425.86 | 9 Oct 2026 |
| G&T Engine Parts | USD 409.88 | 9 Oct 2026 |
| Spare Part Mart | USD 168.04 | Today |
Our price of USD 168.04 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 305-0325. It is not made by or affiliated with Caterpillar; the Caterpillar part number is used only to show what it replaces.
It fits Caterpillar 324D; Caterpillar 325C; Caterpillar 325D; Caterpillar 330D; Caterpillar 336D; Caterpillar 345C; Caterpillar 365C; Caterpillar 385C; Caterpillar M330D. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.
It is made to the same mounting and connections as the original part. Fit new gaskets and seals where they are used, and check for leaks and correct operation 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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