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Caterpillar 30A45-00200 is the engine coolant pump: an aluminium body with a four hole pulley hub, a side outlet, a back plate gasket and a hose nipple. It is used on Caterpillar E305R excavators. This aftermarket version is made to the same mounting and connections as the original, so it fits 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 | Water Pump |
| Replaces | Caterpillar 30A45-00200 |
| Engine | Mitsubishi K4N |
| Pulley hub | 4 hole |
| Includes | Gasket |
| Fits | Caterpillar E305R mini excavators with the Mitsubishi K4N engine |
| Condition | New, aftermarket |
| Stat. HS-Code | 841330 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 30A45-00200(SPM-HEP-4650) | Caterpillar E305R mini excavators with the Mitsubishi K4N engine |
| 30A4500200(SPM-HEP-4650) | Caterpillar E305R mini excavators with the Mitsubishi K4N engine |
What it does
It circulates coolant through the block, head and radiator. A worn seal or bearing lets coolant out and the engine overheat.
Where it is used
Made for the Caterpillar E305R mini excavators with the Mitsubishi K4N engine.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (4 aftermarket sellers) | USD 107.99 to 129.99 | 31 Oct 2026 |
| SINOCMP | USD 139.00 | 31 Oct 2026 |
| Spare Part Mart | USD 86.39 | Today |
Our price of USD 86.39 is 20% to 38% 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 is a direct replacement for the Caterpillar 30A45-00200 with the same fitting.
Often 5,000 to 10,000 hours with clean fluid, much less with dirt or air in the system. It is usually changed on condition, not by hours.
Leaks from the seal or weep hole, noise or whining, overheating, or falling pressure or flow under load.
If the coolant is old or dirty, yes. Worn coolant is the usual cause of seal failure, and a new pump in old coolant fails the same way.
Clean them right back to metal and fit the new gasket or O-ring dry, unless the engine manual calls for sealant.
No. It is an aftermarket water pump made to replace the Caterpillar 30A45-00200. 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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