Dorman - First Stop Drum Brake Wheel Cylinder P/N:W4803

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$66.99
MPN: W4803
Item Package Quantity: 1
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Dorman - First Stop Drum Brake Wheel Cylinder P/N:W4803
Dorman - First Stop Drum Brake Wheel Cylinder P/N:W4803
$66.99

Bring hydraulic pressure back to the rear drum brakes with the Dorman - First Stop Drum Brake Wheel Cylinder W4803. It installs in the rear-left position as a direct-fit replacement for the 1958-1959 and 1962-1966 Cadillac DeVille, 1958-1959 Cadillac Eldorado, 1965-1966 Cadillac Fleetwood, 1958-1959 and 1962-1964 Cadillac Series 60 Fleetwood, and 1958-1959 and 1962-1964 Cadillac Series 75 Fleetwood (all engines).

Inside the drum, this cylinder receives fluid pressure through the brake line and pushes the shoes outward against the drum. If a leaking or seized original cylinder is the cause of a soft pedal or fluid behind the drum, replacing it while servicing the drum brakes helps restore proper hydraulic action.

  • Cast-iron body: 1 in bore with a 7/16-24 brake inlet thread.
  • EPDM rubber cups and boots: made with high-quality EPDM for long-lasting sealing.
  • Professionally tested: the cylinder bore is surface-tested for an optimum sealing surface for the pressure cups.
  • Bleeder screw included (bleeder screw cap not included).

Country of origin: China.

Interchange: W906016 · WC255790 · 375-52012 · 37552012 · 1074878 · 5450407 · 5456434 · 5460714 · 5462064 · WC4803. Manufacturer part number W4803.

This part cross-references / interchanges with the following part numbers:

W906016, WC255790, 375-52012, 1074878, 5450407, 5456434, 5460714, 5462064, WC4803

Frequently Asked Questions

What does this wheel cylinder do?

It receives brake-line hydraulic pressure and pushes the drum brake shoes outward against the drum. Its EPDM cups and boots seal that pressure inside the cast-iron bore.

Which vehicles does it fit?

It's a rear-left fit for the 1958-1959 and 1962-1966 Cadillac DeVille, 1958-1959 Eldorado, 1965-1966 Fleetwood, and 1958-1959 and 1962-1964 Series 60 & 75 Fleetwood (all engines). See the Buyer's Guide tab.

Is a bleeder screw included?

Yes, a bleeder screw is included. A bleeder screw cap is not included.

What are the bore and inlet thread sizes?

The bore inside diameter is 1 inch and the brake component inlet thread size is 7/16-24.

What are signs this part may need replacing?

Signs a wheel cylinder may need replacing include brake fluid leaking behind the drum, a soft or sinking pedal, or shoes not applying evenly. Diagnose the cause before replacing.