Troubleshooting a Roadmaster 9000 Brake System
Updated 12/22/2025 | Published 10/29/2024
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Question:
I have a roadmaster 9000 brake system on my car. If I pull the breakaway pin, the pump runs but the air gauge stays on zero. Any suggestions on what to check?
asked by: Jeff G
0
Expert Reply:
I would check to see if air is coming out of the bottom of the cylinder on your Roadmaster 9000 brake system. If so you've most likely got a faulty valve and you'll need to use the Replacement Quick Exhaust Valve for Roadmaster BrakeMaster item # RM-450601-50. If there isn't air leaking out of your system and it still functions then it sounds like you just have a bad gauge.
expert reply by:
Jerred H
0
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Jerred H.
12/22/2025
Hey, how did things turn out with your Roadmaster 9000 brake system after checking for air at the bottom of the cylinder? Knowing whether the valve or gauge ended up being the issue could really help others troubleshooting the same problem.