Re: Sudden Loss of Power Brake Assist

Posted by HH56 On 2012/5/8 10:50:29

If just assist and not entire brakes, one easy place to get to and look is the check valve at the back of carb. If it has a bit of rust or somehow stays open, sometimes the vacuum available in reserve is not sufficient for an application.

If you are losing entire brakes, another matter entirely and a different issue. Other than a bit of cleaning and lube for the piston leather, I don't think rebuilders spend a lot of time (if any) on the vacuum section when doing a rebuild. If the check valve cleaning doesn't help, you would need to have that vacuum portion looked at by someone known to do good work.