Genuine Dexter Uni-Servo hydraulic wheel cylinder with a 1-1/8" bore — the replacement wheel cylinder for Dexter 10" x 2-1/4" and 12" x 2" hydraulic uni-servo drum brakes. Available in Left Hand (K71-337-00) or Right Hand (K71-338-00). Restore firm, leak-free braking on surge-actuated boat and utility trailers. Made in the USA by Dexter Axle.

🔧 Select Your Side

Choose Left Hand (LH / Driver Side) or Right Hand (RH / Passenger Side) above. Uni-servo cylinders are side-specific — match the cylinder to the brake it services.

Key Features

• Genuine Dexter OEM – Made in USA replacement wheel cylinder
• 1-1/8" bore, cast body, single-plunger uni-servo design
• Fits Dexter 10" x 2-1/4" and 12" x 2" hydraulic uni-servo brakes
• For surge (hydraulic) brake systems

Fitment

• Direct replacement in Dexter uni-servo hydraulic brake assemblies (10" and 12").
• Side-specific — order LH and/or RH to match your brakes.

Specifications

• Type: Uni-servo hydraulic wheel cylinder
• Bore: 1-1/8"
• Fits: Dexter 10" x 2-1/4" & 12" x 2" hydraulic drum brakes
• Brand: Dexter Axle (Made in USA)

Interchange / Also Known As

Dexter K71-337-00 (LH) · K71-338-00 (RH) · AAA SKU 840-0337 / 840-0338.

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• Address: 4675 East Grand River Ave, Howell, MI 48843
• Phone: (517) 225-1991 (Call or text)
• Hours: Monday to Friday: 10:00 AM - 5:30 PM | Saturday: By appointment

Thank you for considering AAA Trailer. We're excited to help you hit the road with confidence! If you have any questions, don't hesitate to contact us.

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 We will be happy to assist you with eligible returns, the return instructions, and the shipping address. If you need a return or exchange, send us an email so we can discuss a replacement.