Trucks / Ford / Master Cylinder / F-550
Used Ford F-550 Master Cylinder for Sale
- OEM used part
- Quality tested
- Fits 2008–2024
- Ready to ship
- 30-day warranty
A Ford F-550 whose pedal creeps to the floor at every stop light has a master cylinder bypassing internally — no leak needed. We stock used OEM brake master cylinders for 2008–2024 Ford F-550 trucks, pressure-tested and covered by our warranty, in the right bore and port configuration. Send your VIN and we confirm the match before you pay.
How it works
This part is in our inventory and ready to ship. Share your VIN and we confirm fitment before you buy, then we’ll call you within about 30 seconds with your quote — or email it if we can’t reach you.
Signs your master cylinder has failed
- Pedal sinks slowly under steady pressure at a stop
- Soft pedal that pumps up, with no external leak
- Brake fluid on the booster face or inside the booster (rear seal)
- Reservoir level dropping with no visible leak — check the booster
- Fine cold, sinks when hot
- Brake warning light from the reservoir level sensor
Before you order
- Send your VIN — bore size, port count/thread and reservoir style vary by GVWR and year.
- Bench-bleed the master cylinder before installation; skipping it is the number-one reason a replacement “doesn’t fix it.”
- Flush the system with fresh DOT 3/4 fluid; on ABS trucks a scan-tool bleed may be needed if air reaches the modulator.
- If fluid was found in the booster, plan on inspecting or replacing the booster.
Other Ford F-550 parts
Frequently asked questions
Do you sell used Master Cylinder for all medium-duty truck brands?
Yes — we carry used master cylinder units for Isuzu, Ford, Chevrolet, GMC, Ram, and Mitsubishi Fuso medium-duty trucks, not just the Ford F-550.
Is this used Master Cylinder tested before it ships?
Yes. Every master cylinder we sell is inspected and tested before it ships, so it works right the first time.
How do I order this Master Cylinder?
Request a free quote above or call us. Share your VIN and we’ll confirm exact fitment, then call you back with a quote in about 30 seconds — if we can’t reach you, we’ll email it instead.
Do you offer a warranty on this Master Cylinder?
Yes, we stand behind this master cylinder with our warranty. Exact terms are confirmed on your quote.
Do you ship this Master Cylinder nationwide?
Yes — we ship to all 48 contiguous states with tracked delivery. Most parts arrive in 3–7 business days; engines, transmissions and axles ship freight and typically arrive in 5–10.
The reservoir is full and nothing leaks — how can it be the master cylinder?
Internal bypass. The piston seals leak inside the bore, so fluid recirculates instead of building pressure — no external evidence at all. A 60-second hold test on the pedal catches it; see our brake-pedal guide.
Is a used master cylinder safe?
A master cylinder from a running donor, pressure-tested before shipping, is functionally the same part your dealer sells — the wear item is the seal set, and wear tracks mileage. We test every hydraulic part and back it with our warranty.
Is the reservoir and cap included?
Yes, as removed from the donor truck.