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Doosan 65.05100-6022 is the gear driven lubricating oil pump: an aluminium pump body with flanged suction and delivery ports, a pressure relief valve and a large helical drive gear. It is used on Doosan D1146 and DE08 engines. 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 | Oil Pump |
| Replaces | Doosan 65.05100-6022 |
| Engine | Doosan D1146, DE08, D2366 |
| Drive | Helical gear |
| Fits | Doosan D1146, DE08 and D2366 engines in Doosan Daewoo DH220-3 and DH300-7 excavators |
| Condition | New, aftermarket |
| Stat. HS-Code | 841330 |
| Country of Manufacture | China |
Doosan machines
Check the part number on your old unit before ordering.
| Doosan Part No.(SPM Part No.) | Fits |
|---|---|
| 65.05100-6022(SPM-HEP-4651) | Doosan D1146, DE08 and D2366 engines in Doosan Daewoo DH220-3 and DH300-7 excavators |
| 65051006022(SPM-HEP-4651) | Doosan D1146, DE08 and D2366 engines in Doosan Daewoo DH220-3 and DH300-7 excavators |
Low oil pressure
A warning light or low gauge reading with the right oil level and a good sender often means a worn oil pump.
Engine rebuilds
Fit a new oil pump whenever the engine is rebuilt or the bearings are changed. Worn gears undo a fresh rebuild.
Noise from the bottom end
Rattles at start-up while the pressure builds are a sign the pump is not priming quickly enough.
Fitting tips
Prime the pump with clean oil, fit new gaskets and O rings, and check the pickup screen before closing up.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| FridayParts | USD 182.25 | 31 Oct 2026 |
| eBay, aftermarket seller | USD 190.00 | 31 Oct 2026 |
| ExpertDieselParts | USD 245.00 | 31 Oct 2026 |
| Fab Heavy Parts | USD 253.12 | 31 Oct 2026 |
| MyMROmarts | USD 292.70 | 31 Oct 2026 |
| SINOCMP | USD 299.00 | 31 Oct 2026 |
| Spare Part Mart | USD 152.00 | Today |
Our price of USD 152.00 is 17% to 49% 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 Doosan D1146, and 3 more listed under compatible equipment. Check the old oil pump is marked 65.05100-6022 or one of the cross references, because makers change parts between serial ranges.
On the Doosan D1146, 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.
Yes. Fill the pump and its suction line with clean fluid before the first start. Running it dry, even for a few seconds, can score it.
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 oil pump made to replace the Doosan 65.05100-6022. 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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