Description
Overview:
The Wheel Pump for Husqvarna chainsaws is a genuine Husqvarna component that drives the chain oiling system, helping to deliver consistent lubrication to the bar and chain during cutting. Precision-moulded from a hard-wearing polymer, it functions as the oil pump's drive wheel/worm gear, engaging cleanly with the pump to keep the lubrication system working as designed. This replacement is intended for Husqvarna 357XP and 359 models, making it suitable for both professional users and keen DIY owners who need dependable operation in forestry, arborist, or firewood tasks. As a Genuine Part, it matches the original specification for fit and performance, providing a straightforward fix where the original drive wheel has worn, become heat-damaged, or failed through normal service use.
Key Features:
- Genuine Husqvarna part for assured compatibility and performance (503 91 29-03 / 503912903)
- Designed for 357XP and 359 chainsaws; direct replacement with no modification required
- Robust polymer construction resists wear and heat for reliable service life
- Precision-moulded drive/worm profile for smooth engagement with the oil pump
- Helps restore consistent bar and chain lubrication to protect cutting components
- Supports efficient cutting and reduces the risk of premature bar and chain wear
- Easy to fit during routine servicing with minimal downtime
- Suitable for both trade and home workshop maintenance
Typical Applications:
Used when a chainsaw shows poor or no chain oiling, during scheduled maintenance, or after inspection reveals a worn or damaged oil pump drive wheel. Common in repair work for forestry, landscaping, tree surgery, and firewood processing where reliable bar and chain lubrication is essential.
Also known as:
Oil pump worm gear, oiler drive gear, pump drive wheel, lubrication drive cog, worm wheel, chain oiler gear, oiler worm, pump drive gear for chainsaw lubrication systems.
Fits Models:
357XP, 359
Alternate Part Numbers:
503 91 29-03, 503912903
