Thread: broken brake booster

Originally Posted by lambrover

can you use any of the range rover boosters and master cylinders on the county, mine has just died and being in Darwin I could be waiting a while, there is a guy up here that has sheds full of range rover parts. cheers

Mate , a lot of the boosters and m/c's are interchangeable. I cant tell from looks what model etc you have but I am sure if you take the broken one in and look for a Rangie about the same vintage you will probably find what you are looking for......If not give me your model,year etc and I will see what I can find down this way. Most of the original was Girling but if you have an Isuzu powered factory county it will have a PBR unit. let me know what model you have.....Bearman

thanks mate, I will slowly drive my car to where the rangies are and cross check them tomorrow, mine is the v8 1985 county.cheers

It should be the Girling one Part no NRC4772 or 4775 the only difference in the two is the location of the non return valve position (the plastic elbow thing that the vacuum line is attached to and the overall diameter. NRC4772 is 276mm diameter and NRC4775 is 227mm diameter. Are you sure it is the booster as vacuum for this comes from the inlet manifold via a t piece that goes to a vacuum reservoir (on a/c models). Could be its leaking somewhere. Usually you can hear the air being sucked into the booster from inside the vehicle when you press the brake pedal while the engine is idling. It should also speed up and run rough. Regards....Bearman

Originally Posted by lambrover

thanks mate, I will slowly drive my car to where the rangies are and cross check them tomorrow, mine is the v8 1985 county.cheers

How did you go mate - have a win?

Hi mate thanks for the follow up, yep I was sure it was the booster leaking as the engine revs higher with peddle depressed and the noise in the cab when depressed. any way I have been able to fit a dual diaphragm booster with the master cylinder from a range rover, had to mod my peddle box a little but it's in, thanks again.

Mark

Good to hear, mate at least you are back on the road again...Regards Brian