Description
Overview:
The Pump Piston is a genuine Husqvarna component for the oiling system used across a wide range of Husqvarna chainsaws. It is a precision‐made metal piston with sealing elements that drives the oil pump to deliver bar and chain lubrication during cutting. This keeps the chain supplied with oil so the saw runs smoothly under load. Designed for direct replacement, it fits selected petrol and battery models, including the Husqvarna 135 and 440 e II. Built to the manufacturer's specification, it offers a secure fit within the pump housing and dependable operation for routine maintenance or repair.
Key Features:
- Genuine Husqvarna part for assured fit, function, and compatibility
- Precision-engineered piston for consistent oil pump performance
- Durable metal construction with quality sealing surfaces
- Helps maintain correct bar and chain lubrication in service
- Direct replacement for worn or damaged pistons
- Stable operation across a wide model range, petrol and battery
- Suitable for workshop or on-site maintenance with standard tools
- Supports reliable cutting by keeping the oiler working as intended
Typical Applications:
Used to restore or maintain the oil pump function on compatible Husqvarna chainsaws. Ideal when the saw shows poor chain oiling, intermittent flow, or after inspection reveals wear on the pump piston. Suited to routine servicing for arborists, grounds maintenance, landscaping, and hire fleet upkeep, as well as domestic users who want dependable lubrication performance.
Also known as:
Oil pump piston, oil pump plunger, oiler piston, chain lubrication pump piston, chainsaw pump plunger, lubrication pump component, replacement pump piston for chainsaw oilers.
Fits Models:
135, 135E, 140E, 327PT5S, 330i, 330iKP, 340i, 435, 435 e II, 435E, 435II, 435eII, 435i, 436Li, 440 e II, 440E, 440II, 440eII, 445, 445 e II, 445E, 445II, 445eII, 450, 450 e II, 450eII, 525PT5S, 525iDEPS, 530iP4, 530iPT5, 530iPX, 535i XP, 535iXP, 536 LiXP, 536Li XP, 536LiP4, 536LiPT5, 536LiPX, 536LiXP, T535i XP, T535iXP, T536Li XP, T536LiXP
Alternate Part Numbers:
540 05 79-01, 540057901
Product Specifications
| L&S Part No. | 540 05 79 01 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 540057901 |
| Unit of Sale | 1 |
| Applications | 135, 135E, 140E, 327PT5S, 330i, 330iKP, 340i, 435, 435 e II, 435E, 435II, 435eII, 435i, 436Li, 440 e II, 440E, 440II, 440eII, 445, 445 e II, 445E, 445II, 445eII, 450, 450 e II, 450eII, 525PT5S, 525iDEPS, 530iP4, 530iPT5, 530iPX, 535i XP, 535iXP, 536 LiXP, 536Li XP, 536LiP4, 536LiPT5, 536LiPX, 536LiXP, T535i XP, T535iXP, T536Li XP, T536LiXP |
| Machine Type | Chainsaws |
| Fits Brands | Husqvarna |
| Fits Models | 135 | 135E | 140E | 327PT5S | 525PT5S | 536LiP4 | 536LiPT5 | 536LiPX | 435 | 435E | 435EII | 435II | 436LI | 440E | 440EII | 440II | 445 | 445E | 445EII | 445II | 450 | 450EII | 536LIXP | 530iPT5 | 340i | 535i XP | T535i XP | 435i | 330i | 436Li | 536Li XP | T536Li XP | 330iKP | 525iDEPS | 530iP4 | 530iPX |
