Products Description
Automatic Chain Oil Pump fits HUS135 140 340 345 350 435 440 445 450 Chainsaw
Worm-Gear-Driven Positive-Displacement Lubrication Module featuring Adjustable Output Plunger and Multi-Model Compatibility for 35cc-50cc Professional Chainsaw Bar & Chain Protection.
Chain saw HUS135/HUS140/HUS340/HUS345/HUS350
HUS435/HUS440/HUS445/HUS450 Oil pump
The HUS multi-model automatic oil pump constitutes a precision positive-displacement lubrication module engineered for the continuous, metered delivery of bar-and-chain oil from the reservoir to the guide bar rail and chain articulation points. Driven by a worm-gear mechanism coupled to the clutch drum or crankshaft, it converts rotary engine motion into a reciprocating plunger stroke that pumps a calibrated oil volume with each cycle. The pump's output rate increases proportionally with engine RPM-delivering minimal oil at idle to prevent dripping and pooling, and maximum flow at full-throttle cutting speeds where the chain's centrifugal forces and frictional heating demand peak lubrication. A field-adjustable output plunger enables the operator to fine-tune oil delivery for different bar lengths, wood species, and cutting conditions.
Technical Profiles & Materials
Angular Multi-Plane Ventilation Architecture Triple louver vents on the housing build natural convection airflow over the spring and pulley assembly. Quickly releases friction heat from repeated cold pulls, avoiding thermal softening that weakens starter rope and distorts the nylon pulley.
Heavy-Duty Clock-Spring Energy Storage Thicker, more coiled high-carbon steel clock spring stores ample kinetic energy. It smoothly rewinds the rope to crank large 90cc high-compression engines without sudden jerks, protecting internal parts and easing wrist fatigue.
Reinforced Nylon Pulley with Abrasion-Guard Rope Exit 30% glass-filled PA6 pulley withstands frequent high-tension rope retraction and temperature swings, free of radial expansion and hub cracking. The rounded rope outlet eliminates sharp edges to stop cord fraying and premature breakage.
Technical Specifications
| ITEM | DETAILS |
| Type | Automatic Worm-Gear-Driven Chain Oil Pump |
| Application | Chainsaw Bar & Chain Lubrication (35cc-50cc Professional Saws) |
| Code | 0125028 |
| Material | Brass-Alloy Pump Body / Steel Plunger & Spring / GF-Polymer Drive Sleeve |
| Details explanation | Worm-Gear from Clutch Drum / Crankshaft |
| Brand Name | SeaSummer |
| Operating Temp | -20°C to +80°C |
| Delivery Time | 30 Days |
| Packaging | Cardboard packaging |
Products Application
Professional Fleet Multi-Model Service Standardization
An essential lubrication-system spare component for chainsaw dealerships, forestry equipment service depots, and municipal tree-service departments managing mixed fleets spanning the HUS 135 through 450 series. This pump's unprecedented nine-model compatibility dramatically simplifies spare-parts logistics-a single stocked part number replaces nine separate OEM oil-pump SKUs-reducing inventory carrying costs and eliminating the workshop delays caused by discovering the wrong pump variant has been ordered during a time-critical saw repair.
Worn-Out Pump Output Restoration
Ideally suited for correcting the progressive lubrication-decline that occurs as a high-hour oil pump's internal plunger and bore wear increases the internal clearance-allowing pressurized oil to leak back into the tank inlet instead of being displaced to the bar pad. This internal leakage is invisible to external inspection, gradually reducing the actual oil-delivery rate until the bar and chain are running effectively dry even though the pump appears to be functioning and the operator has not touched the adjustment screw.
Bar & Chain Lubrication System Restoration
Serves as the critical chain-protection restoration module for chainsaw technicians addressing the classic symptoms of oil-pump failure-a dry, overheating guide bar that scorches wood and turns blue at the rails, a chain that seizes against the bar during cutting due to inadequate lubrication, and the complete absence of oil spray from the bar tip despite a full oil tank. Replacing a worn, clogged, or mechanically failed pump restores the continuous oil film between the chain drive links and the bar rails that prevents the metal-to-metal friction responsible for rapid bar and chain wear.
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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YOUR PROFESSIONAL ONE-STOP SOURCE
FOR 10000+ OUALITY PARTS
Verified Factory Excellence
BACKED BY 200+ TRUSTED FACTORY PARTNERS
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FAQ
Q: Are you an impartial industrial components dealer or a direct China water pump factors factory?
A:We are a direct, ISO9001-certified engineering water pump components manufacturing facility and precision fluid-control factor manufacture exporter primarily based in China. We function our personal cleanroom injection molding bays, computerized ultrasonic welding arrays, computerized hydraulic stress check stations, and clean-room packaging lines, passing direct-factory wholesale price financial savings straight to your element procurement margins.
Q: Can your manufacturing unit furnish full certification forms for food-contact or consuming water compliance?
A: Yes, absolutely. For food, beverage, or scientific applications, our manufacturing unit makes use of one hundred percent virgin, un-recycled polypropylene resins accompanied by means of fabric traceability certificates. We mechanically furnish B2B purchasers with complete FDA compliance documentation, NSF-grade compound declarations, and RoHS/REACH chemical protection screening sheets to make certain clean clearance thru worldwide customs.
Q: Do you provide customization picks for distinctly corrosive fluids like sturdy acids or ozone?
A: Yes, we are a thoroughly succesful OEM/ODM supplier. For aggressive chemical or ozone environments, we can improve the 12x26.5mm valve configuration in our factory: substituting the general PP housing with top class PVDF (Fluoropolymer) and changing any steel springs with Hastelloy or whole springless gravity-ball architecture, making sure final chemical resistance.
Q: How do we impervious a pattern batch to execute computerized lifecycle and burst-pressure testing?
A: We relatively inspire complete laboratory contrast earlier than logging mass grant agreements. We can ship a pattern lot of 5-10 gadgets of our inventory 12x26.5mm take a look at valves for assessment (setup costs and DHL/FedEx air freight apply). Once the factors pass by your inner lifecycle verification and a formal wholesale quantity manufacturing contract or container run is locked in, the sampling charges are a hundred percent credited returned to your industrial balance.
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