Husqvarna 503892103 Oil Pump Pinion Chainsaw Part

Product Description

The HUSQVARNA 503892103 is a genuine OEM oil pump pinion designed for Husqvarna chainsaw models. The oil pump pinion is a small but critical drivetrain component within the automatic bar oiling system. It transfers rotational force from the crankshaft or drive shaft to the oil pump worm gear, which pressurizes the flow of bar and chain oil during operation. Without a functioning pinion, the oiling system fails to deliver adequate lubrication to the bar and chain, accelerating wear and risking damage to cutting components. This part is sourced directly from Husqvarna as a genuine OEM replacement, ensuring correct fit and material specification for the original application.

This pinion is intended for Husqvarna gas-powered chainsaws equipped with an automatic oil pump oiling system. It is a service part typically replaced during oil pump rebuilds or when visible wear, chipping, or stripping of the pinion teeth is found during inspection. Chainsaw service technicians and small engine repair shops are the primary installers of this component. No compatibility data was provided in the source listing, so refer to your chainsaw service manual or Husqvarna parts lookup to confirm fitment for your specific model and serial number range before ordering.

Key Features

• Genuine Husqvarna OEM part — direct factory replacement, no modification required
• Critical component in the automatic bar and chain oiling system
• Transfers drive force to the oil pump to maintain consistent lubrication during cutting
• Replacement of a worn or stripped pinion restores proper oil delivery to the bar

Compatibility

Designed as a genuine OEM-style replacement pinion for Husqvarna gas-powered chainsaws equipped with an automatic oil pump system. Confirm fitment using your model and serial number via the Husqvarna parts catalog before installation, as no specific compatible model numbers were provided in the source data.

Installation Notes

Installation should be performed by a qualified chainsaw technician or small engine repair professional familiar with Husqvarna oiling system service procedures. Before beginning any disassembly, remove the spark plug wire to prevent accidental engine start. Drain or isolate the oil reservoir before removing oiling system components. Consult the applicable Husqvarna service manual for the correct disassembly sequence and torque specifications for your model, as these values vary by unit.

Technical Specifications

• Part Type: Oil Pump Pinion
• OEM Status: Genuine Husqvarna OEM Part
• Application: Gas-Powered Chainsaw Automatic Bar Oiling System

Standard Information

• Brand: HUSQVARNA
• Manufacturer Part Number: 503892103