Dodge RAM Cab: Brake pedal loose after replacing Brake Calipers?

Tried Bleeding brakes but brake pedal gets loose or gets stuck up.All started after replacing Brake caliper.

Yes this is common.

Its not problem with brake bleeding procedure.

But the problem mostly lies in brake caliper.

The first thing is to check the placement of the caliper bleeder screws on the front calipers. They are supposed to be at the top of the caliper, above the brake hose to caliper connection:

See the help Diagram shown below:----


If they are towards the bottom or facing the bottom, then the calipers are on the wrong sides. When bleeder is at the bottom, there is an air pocket at top of caliper that will never bleed out. Swap sides with calipers and rebleed and you are good to go.

This details will help.
Thanks.

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Complete loss of brake pedal then all gets normal?

Very rare,very rare issue.
Have never encounter a complete loss of brake pedal then have it come back. 
See if you get Any ABS warning indicator.IF no then

There are really only 2 things that could be involved here if there is no fluid loss. The master cylinder internal leak or and issue in the ABS actuator. Because the are no warning lights for the ABS it is not likely an issue with the actuator. This only leaves an intermittent issue in the master cylinder which would be extremely odd. 

Check properly and inspect,Fluid level in the master cylinder looks good?

If NO,then replace the fluid.

This details will help you.

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