Polaris Brake Hose Line 2204138
Updated June 11, 2026
This brake hose line (OEM part number 2204138) is a hydraulic brake component used on Polaris Pro RMK and Assault snowmobiles from 2011 to 2015. It connects the master cylinder to the brake caliper, transmitting hydraulic pressure to actuate the brakes. Compatible with 600cc and 800cc models on 155-inch and 163-inch track lengths.
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How It Works
The brake hose is a flexible, reinforced rubber line that carries brake fluid from the master cylinder to the caliper. When the brake lever is squeezed, hydraulic pressure forces fluid through the hose, pushing the caliper pistons to clamp the brake pads against the disc, slowing the snowmobile.
Common Failure Symptoms
Over time, the hose can crack, leak, or become brittle due to age, UV exposure, or chemical damage. Symptoms include a spongy brake lever, visible fluid leaks, reduced braking power, or a complete loss of braking. Inspect the hose for cracks, abrasions, or bulges, especially at connection points and near moving components.
Installation Notes
Installation involves removing the old hose, bleeding the brake system to remove air, and ensuring proper routing to avoid chafing or pinching. Use new copper washers at banjo fittings if provided. Torque fittings to manufacturer specifications. Ensure the hose does not contact exhaust or other hot components. Test brake function before riding.
