Products Description
Echo CS3000/CS300/CS301/CS305/CS340/CS341/CS3400/CS345 Oil Pump
OEM-Spec Replacement Oil Pump for Echo Chainsaw Models
This oil pump is a direct replacement for the automatic lubrication system on Echo CS3000, CS300, CS301, CS305, CS340, CS341, CS3400, and CS345 chainsaws. The oil pump is a critical component that ensures continuous lubrication of the chain and guide bar during operation, preventing premature wear and damage to your equipment. A faulty oil pump can cause insufficient lubrication, leading to chain overheating, bar damage, and reduced cutting performance. Available in both genuine Echo OEM parts and quality aftermarket alternatives, this direct-fit component restores proper oil flow and extends the service life of your chainsaw's cutting system.
Technical Profiles & Materials
Automatic Lubrication System – The oil pump continuously delivers bar and chain oil during operation, activated by the engine's rotation. This ensures consistent lubrication throughout the cut, reducing friction and wear.
OEM-Spec Replacement Fitment – Echo OEM oil pump number 43700239130 is compatible with a wide range of Echo models. Aftermarket versions are also available replacing OEM numbers 43700293130 and 43700239130.
Durable Construction – Manufactured from corrosion-resistant metal to withstand the high-vibration, high-temperature environment of chainsaw operation. Quality aftermarket options are available from ISO-certified manufacturers.
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | OEM Part No. (Primary) | 43700239130 |
| 2 | Alternative OEM | 43700293130 |
| 3 | Compatible Models | CS3000, CS300, CS301, CS305, CS340, CS341, CS3400, CS345 |
| 4 | Also Compatible | CS3450, CS346, CS350, CS440, CS450, CS510, CS520, CS530 |
| 5 | Lubrication Type | Automatic oil pump |
| 6 | Oil Pump Cap OEM | 43706237330 (oil pump cap/plug) |
| 7 | Worm Gear OEM | V652000021 (replaces 43706338330) |
| 8 | Unit of Sale | 1 piece or complete kit |
Products Application
Chainsaw Lubrication System Restoration
Direct replacement when the chainsaw exhibits insufficient chain lubrication, chain overheating, or premature bar wear. The oil pump is the heart of the automatic lubrication system, and replacing a faulty pump restores proper oil delivery to the guide bar and chain.
Internal Oil Leak Repair
The Echo CS-345 and compatible models are known for internal bar oil leaks caused by worn oil pump seals, gaskets, and shaft seals. Replacing the oil pump assembly along with the pump gasket and shaft seal resolves these leaks and prevents oil from escaping internally.
Preventative Maintenance
Regular inspection and replacement of the oil pump and associated components (worm gear, oil pump cap, gaskets, and hoses) prevents chain and bar damage from insufficient lubrication. For high-hour saws, replacing the oil pump proactively ensures consistent chain lubrication and extends the service life of your equipment.
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm this oil pump fits my Echo chainsaw?
A:Check your chainsaw model number on the housing. This oil pump is compatible with Echo CS3000, CS300, CS301, CS305, CS340, CS341, CS3400, and CS345 models. The primary OEM part number is 43700239130. If replacing the oil pump cap, use OEM 43706237330.
Q: What are the symptoms of a faulty oil pump?
A: Common symptoms include insufficient or no oil reaching the bar and chain, chain overheating, excessive bar wear, and visible oil leaks from the pump area. The Echo CS-345 is particularly known for internal bar oil leaks caused by worn oil pump seals and gaskets.
Q: What components are included in a complete oil pump service kit?
A: A comprehensive kit may include the oil pump assembly, oil pump gasket, shaft seal, worm gear, and oil hoses. The worm gear OEM number is V652000021 (replaces 43706338330). For the oil pump cap/plug, use OEM 43706237330.
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