Can anyone give me an idea of how strong the vacuum pump should be that assists the master cylinder? I’ve taken the pipe off and I can feel some suction, but it’s quite weak. Should this be a strong suction on tick-over? The brakes have never been great on my RRC, but if you pump them on tickover they're particularly bad.
Brake vacuum pump
- Thread starter DaveRRC
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payydg
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Hard to tell as what you’re describing is quite subjective. You should get a reasonable amount of suction. If the brakes are **** and not much suction then thinking about the vacuum pump isn’t a bad start.
Have a nosy here:-
https://www.knowyourparts.com/techn...-brake-components/vacuum-booster-diagnostics/
If you search around the web, you'll find that the figures given are pretty much standard, across the board - 15-20 inHg ....
Also, there's another thread with very similar content :-
https://www.landyzone.co.uk/land-rover/hard-brakes.375493/
Thanks gents. I did buy a new replacement unit. To my surprise, the suction wasn't that good, but notably better that the old one (which I suspect had been on there for the 209k of that engine).
The result was good. The brakes are better. Especially on tick-over, where you can pump the brakes and the pedal now doesnt go hard.
Pleased with the result.
The result was good. The brakes are better. Especially on tick-over, where you can pump the brakes and the pedal now doesnt go hard.
Pleased with the result.
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