OEM 2003 Ford F-250 Super Duty Brake Master Cylinder

2003 Ford F-250 Super Duty Brake Master Cylinder Parts Q&A

• Q: How to service and repair the brake master cylinder on 2003 Ford F-250 Super Duty?

  A: Begin service and repair of the brake master cylinder by extracting it from the vehicle and cleaning its outside then proceed with removing the filler cap. As a next step remove the filler cap and collect all brake fluid from the reservoir. Once applicable procedures allow remove the brake pressure switch. Release the primary piston assembly through depressurization to extract its snap ring after which you should discard it. You must first use compressed air through the front outlet port as you plug both the rear outlet port and the brake pressure switch port to safely discard the secondary piston assembly. The brake master cylinder bore needs replacement if damaged but cleaning with isopropyl alcohol followed by inspection for damage can be performed when replacement is unnecessary. Insert the new piston assembly elements into the primary and secondary functions following lubrication using clean High Performance DOT 3 Motor Vehicle Brake Fluid C6AZ-19542-AB or an equivalent fluid that complies with Ford specification ESA-M6C25-A. Finish the process by putting back the brake pressure switch then fix the original brake master cylinder into place.