Find your parts diagram
Sticker on the pump body (the part with the basket), not on the motor. Motor labels from Century, A.O. Smith or Regal won't match parts.
Label on the side of the tank near the base. Size is in sq ft, e.g. 420 sq ft = C4030 or CCP420.
Rating plate inside the front access panel. Note the BTU and gas type (NG or LP).
Molded into the body or printed on top. Robotic cleaners: on the power supply.
Still not sure? Call (818) 818-6559 and we'll find it for you.
Polaris Left Side Brush Gearbox for Quattro P40 (Q4000) - Black | R0838500
Fits these models (4)
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Goes with this part
CA P65 Warning: Cancer and reproductive harm. www.p65warnings.ca.gov
The Polaris R0838500 is the genuine left-side brush gearbox for the Quattro P40 (Q4000) pressure-side pool cleaner, in black. This gearbox drives the cleaner's side brush, powering the scrubbing and debris pickup that keeps your pool floor and walls clean. When the original gearbox wears, seizes, or stops turning the brush, this OEM replacement restores full cleaning action. Fit the correct left-side unit to get your Quattro P40 back to work.
- Genuine Polaris Part: OEM left-side brush gearbox (R0838500) for the Quattro P40.
- Drives the Side Brush: Powers the brush that scrubs surfaces and pulls in debris.
- Left Side, Black: Correct-side replacement in the factory black finish.
- Restores Cleaning Action: Replaces a worn or seized gearbox to bring the cleaner back to full performance.
- Brand: Polaris (genuine OEM)
- Part number: R0838500
- Component: Left side brush gearbox
- Color: Black
- Fits: Polaris Quattro P40 (Q4000)
- Polaris Quattro P40 / Q4000 pool cleaners
- Left side; confirm your cleaner uses part R0838500
Which cleaner does this fit?
The Polaris Quattro P40 (also known as Q4000).
Is this the left or right side?
The left-side brush gearbox.
Is it genuine Polaris?
Yes, it is a genuine Polaris OEM part.