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Crown Automotive Wheel Cylinder – J8126744

Crown Automotive

  • Rear driver-side wheel cylinder for 10 inch brakes
  • Fits the 1966–1971 CJ5 and CJ6 and 1966–1968 CJ5A and CJ6A
  • Direct-fit Crown Automotive replacement

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Description

Overview

The Crown Automotive J8126744 is a driver-side rear wheel cylinder for 10 inch brakes on the 1966–1971 CJ5 and CJ6, and the 1966–1968 CJ5A and CJ6A.

It is one of a left and right pair of cylinders.

Key features

  • Rear driver-side wheel cylinder
  • For 10 inch brakes
  • Direct-fit CJ application

Rear wheel cylinder service

Rear wheel cylinders push the shoes against the drum when the brakes are applied, and they work with the parking brake linkage on many drum setups. Fluid that seeps past the piston seal or the boot will wet the shoes and drum, and that contamination can reduce braking force. Replace the cylinder when fluid appears, or when the pistons stick and the shoes drag.

Because the left and right cylinders are separate parts, match the position carefully and avoid swapping sides. Pull the drum to check for leaks and inspect the shoes before fitting new cylinders, and bleed the system after the hose connection is made. Test the brakes at low speed before driving normally.

  • Confirm the side before ordering
  • Check shoes and drums for fluid contamination
  • Bleed the system after installation

Specifications

Brand Crown Automotive
Part number J8126744
UPC 848399068634
Product type Drum brake wheel cylinder
Position Rear, driver side
Brake size 10 inch
Fit type Direct fit

Vehicle fitment

It fits the 1966–1971 Jeep CJ5 and CJ6 and the 1966–1968 CJ5A and CJ6A.

CJ5 and CJ6 models before 1966 and the CJ7 are not on the list. Confirm your vehicle’s year, model and trim before ordering.

SKU: CROJ8126744 Category:

Specification

Shipping weight 4.00 lbs
Package dimensions 4.00 × 2.50 × 2.50 in
brands

Fitment

VehicleYearsTrims
Jeep CJ51966–1971Base
Jeep CJ5A1966–1968Base
Jeep CJ61966–1971Base
Jeep CJ6A1966–1968Base

Use “Select your vehicle” at the top of the page to check this part against your vehicle.

Questions & Answers

Which side is the Crown J8126744 for?

The rear driver side. The passenger-side rear cylinder on the same axle is a separate part, so check which wheel you are working on.

What brake size does the J8126744 fit?

It fits 10 inch brakes. Measure your drums before choosing this rear wheel cylinder, measuring across the inside of the drum.

Which years does the J8126744 cover?

Crown lists 1966–1971 for the CJ5 and CJ6, and 1966–1968 for the CJ5A and CJ6A, so models outside those years are not covered.

Does the J8126744 fit a CJ7?

No. The CJ7 is outside its fitment, so a CJ7 owner should look for a wheel cylinder that names the CJ7 for the year and brake size.

Should I replace the rear wheel cylinders in pairs?

Inspect both at the same time, since wear on one side can show on the other. Replacing both keeps the rear brakes working evenly from side to side.

What wears out in a rear wheel cylinder?

The piston seals and boot wear first, and the cylinder bore can corrode or scratch. Fluid leaks, sticking pistons and drag on the shoes are the usual signs.