Dorman - First Stop Drum Brake Wheel Cylinder P/N:W610187

Turn hydraulic line pressure into stopping force with the Dorman First Stop Drum Brake Wheel Cylinder W610187. Located at the rear left forward position, it uses brake-fluid pressure to push its internal cups and pistons outward, forcing the brake shoes against the drum. It drops in as a direct-fit replacement built to match the fit, function and performance of the original wheel cylinder on the listed 2004-2017 Chevrolet, GMC and Isuzu medium-duty trucks — including the Chevrolet W4500/W5500 Tiltmaster, GMC W4500/W5500 Forward and Isuzu NPR-HD/NQR (see the Buyer's Guide tab for the full list).

• Cast iron construction: a cast iron body houses the hydraulic pistons and cups.
• Quality materials: high-quality EPDM rubber cups and boots for long-lasting performance.
• Professionally tested: the cylinder bore is surface-tested to provide an optimum sealing surface for the pressure cups.
• Hardware: a bleeder screw is included; the bleeder screw cap is not included.

Key specs include a 1.313 in bore with an M10 x 1.0 inlet thread. Signs this part may need replacing include brake-fluid leaks at the cylinder, fluid-dampened shoes, or a low, spongy pedal; if a leaking wheel cylinder is the cause, this replaces it. Country of origin: China.

Interchange: 134.76042 · 375-47095 · 37547095 · 97358880 · 8973588800 · WC370237 · Manufacturer part number W610187