I have a land Rover Discovery and my brake pedal is hitting the floor. I am not sure what is going wrong with the beast. It looks like it has a workable amount of fluid in the master cylinder. What would be the best way to go about diagnosing the problem at hand.

 

When were the brakes last serviced?

 

IMHO start by flushing all the old fluid out for all four wheels, will take about 2 quarts of DOT4 brake fluid. That will allow you to bleed out any air you have accumulated. After that, perhaps leaky calipers, but you did not mention pulling to one side.

 

Another fellow member had a similar problem, he changed the Master Cylinder, still had the problem, then he looked underneath and found a busted brake hose or line, do not remember which.

My point is, we cannot very well predict what your exact problem is without a lot more info. Have you gotten underneath it and taken a close look to see what conditions you have?

If it is a new to you Disco, it may need a lot of things. Brakes are critical. If you do not have the skills to do it yourself, take it to someone you can trust. If you can do most of it yourself, you can save lots of money.

Buzz's suggestion is the best place to start after a good visual inspection of the entire underneath to see what condition your brake lines, hoses, calipers, rotors and pads are in.

If the brake fluid in it is black, you can use a turkey baster to suck out as much old stuff as possible from the reservoir. Spray the drain plugs with PB Blaster, bleed out all the old fluid. See how good the calipers are and if the system will hold pressure with all the air bled out.

 

Do a complete 2 quarts DOT 4 brake flush before throwing parts at it, then get back to us.
By the way, what is a workable fluid level and what color is the fluid, brown or clear?

 

I have a 99 LR Disco 2, just had new discs/pads installed by dealership. All of a sudden the pedal goes to the floor. brakes still work, eventually. after driving for an hr or so, the pedal slowly comes back to normal and by the end of the day, the brakes are fine.

Any suggestions from the experts? Sure appreciate.

 

Air needs to be bled from the system, it probably did so as you drove it. If it continues by all means take it back to them to diagnose and correct.