The Husqvarna 580999801 Gearbox Assembly is a genuine OEM component designed for the PG820 and PG820RC floor grinders. As a direct factory replacement, this assembly matches the engineering specifications of the original unit, ensuring correct power transfer and grinding head operation on both the standard PG820 and the remote-controlled PG820RC. DHS Equipment supplies this part to help keep your equipment running at full capacity. Cross-reference part number 580999801 against your parts diagram to confirm fitment before ordering.
Key Features
- Genuine OEM Gear Tolerancing — manufactured to Husqvarna's original design specifications, ensuring correct gear mesh, torque transfer, and internal clearances specific to the PG820 gearbox design.
- Drop-In Assembly Replacement — supplied as a complete Gearbox Assembly, allowing a single-unit swap that restores the full drivetrain without sourcing individual internal components.
- Confirmed PG820 and PG820RC Fitment — engineered specifically for both the standard PG820 and the remote-controlled PG820RC planetary floor grinders, covering both operator configurations in this machine family.
- Restored Grinding Head Performance — a functioning gearbox delivers consistent torque to the grinding heads; a worn or failed unit causes uneven tool rotation, vibration, and loss of surface prep quality.
- Structural Durability for Heavy-Cycle Use — floor grinders operate under sustained load across large concrete surfaces; this assembly is built to handle the continuous mechanical demands of professional surface preparation work.
The gearbox assembly transmits power from the motor to the planetary grinding heads, converting motor speed into the torque and rotational output needed to drive grinding or polishing tooling across concrete and stone surfaces. It is a core mechanical component in the drivetrain — when internal gears wear or the assembly fails, grinding head speed becomes inconsistent, output torque drops, and surface finish quality deteriorates. Replacing the gearbox assembly with the correct OEM unit restores the drivetrain to its original operating condition and protects the surrounding components from secondary wear.
Part Details
| Part Number | 580999801 |
|---|---|
| Brand | Husqvarna |
| Part Type | Genuine OEM |
| Description | Gearbox Assembly |
Compatibility & Fitment
| Name | Model |
|---|---|
| Floor Grinder | PG820 |
| Floor Grinder | PG820RC |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
