When Replacing Trailer Brake Lines Is Bleeding the System Required to Get Fluid to Assemblies
Question:
Recently replaced mstr cylinder on old style DA91 actuator. Replaced all wheel cylinders, then tried to flush and bleed brakeline pneumatically. No brake fluid ever reached wheel cylinders. Old master cylinder was dry and rusty, so possibly brake lines have rusted up and plugged. With brake line disconnected at mstr cylinder, actuator was pumped and brake fluid would shoot out the orfice with new mstr cylinder. So, have decided to replace all brake lines and hoses and ordered a Kit. My question is, with or without the pneumatic bleed, does the actuator need to be engaged or pumped for brake fluid to reach the wheel cylinders? Thanks
asked by: Steve
Expert Reply:
You will need to bleed the brake system to get all of the air out of the lines after replacing the brake lines. Filling up the master cylinder will get some fluid into the lines but not a whole lot. You will need to keep bleeding them till there are no air bubbles that come of the wheel cylinders.
If you have a power bleeder you would not need to actuate the actuator to build pressure as the power bleeder will do that for you.
To make bleeding the brakes easier and quicker we have the # ALL648591 but it sounds like you already have a power bleeder.
Products Referenced in This Question
Powerbuilt Brake Bleeder - Master Kit
- Automotive Tools
- Specialty Tools
- Brake Bleeder
- Powerbuilt
more information >
Product Page this Question was Asked From
Demco Hydraulic Brake Line Kit for Tandem Axle Trailers - Drum Brakes
- Accessories and Parts
- Brake Actuator
- Trailer Brakes
- Hydraulic Drum Brakes
- Brake Lines
- Steel Brake Line
- Brake Line Kits
- Tandem Axle
- Demco
more information >
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