Question about 2004 Dodge Ram 2500
You either have air in the system or a faulty master cylinder.
Check fluid is being delivered from the master cyl. by slackening off each of the brake line connections in turn (at the master cylinder) while depressing pedal.
Until fluid is able to be delivered from the master cyl. itself you have no hope of bleeding the rest of the system.
As with all brake bleeding processes, only release the fluid lines when the pedal is being pushed slowly down - re-tighten it on the upward stroke of the brake pedal to stop it drawing air back into the system.
When you have achieved fluid delivery from the master cyl. move to each wheel in turn, starting at one of front wheels, then to the other front whl, then to the rear.
Again only open the bleeder valve when the pedal is being pushed slowly down.
(If you keep the master cylinder full of brake fluid, sometimes gravity will cause the brake line to 'self bleed' if the bleed nipple is left slightly open for several minutes at the start of the bleed process).
When fluid appears, then move to the next wheel and repeat the process until the pedal hardens up.
If you have the time to spare, I have often found that provided the master cylinder is kept full, leaving the system overnight will allow a lot of the air to leave the system (gravity helps).
Patience is required.
Posted on Jun 04, 2009
Did you bleed the master prior to installation? If not you may have a bunch of air trapped in the system. Start at the master and use a pressure bleeder too get the air out. If you have anti-lock you may have to have the dealer purge the system.
Posted on Jun 04, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
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Fig. 1: Loosen the front brake line in order to bleed the master cylinder
Fig. 2: Connect a bleed hose from the bleed valve on the front caliper to a jar of brake fluid
Fig. 3: Always follow the lettered sequence when bleeding the hydraulic brake system
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