Brake Boosters explained

[cheesygrinner]

My mechanic has just been putting in a reconditioned brake booster in my WB van. He is going to take another look on Friday as he didn't have time to finish the job completely yesterday.

When the brakes are applied via the pedal, it has the feeling of a notch in the actuation about 2/3 of the travel of the pedal.

Any ideas to what this might be? The issue wasn't there prior to new booster fitment? Just trying to troubleshoot it.

[mook]

My mechanic has just been putting in a reconditioned brake booster in my WB van. He is going to take another look on Friday as he didn't have time to finish the job completely yesterday.

When the brakes are applied via the pedal, it has the feeling of a notch in the actuation about 2/3 of the travel of the pedal.

Any ideas to what this might be? The issue wasn't there prior to new booster fitment? Just trying to troubleshoot it.

Sort of a side note to anyone tinkering with the WB's, as I discovered yesterday the slave cylinder fittings for the brake lines are imperial, but at the other end it's metric. So the imperial fitting will go into the metric hole but be loose and the metric fitting won't fit the imperial hole. Only a minor trap a discovered after 3 hours of swearing under the van.

[SLR_dave]

Sort of a side note to anyone tinkering with the WB's, as I discovered yesterday the slave cylinder fittings for the brake lines are imperial, but at the other end it's metric. So the imperial fitting will go into the metric hole but be loose and the metric fitting won't fit the imperial hole. Only a minor trap a discovered after 3 hours of swearing under the van.

Interesting subject. May I add a further side note to that, when I went to get the brake line over the rear axle re-made cause it was mangled, my local brake shop did it pretty inexpensively in new bunge, but the fittings they provided had metric flats, (This was to go on an HX).

They reckoned they could not get fittings with imperial flats anymore, but said the thread on the fittings they supplied was the same. Anyway, whilst the thread fitted, the flats are metric. I really don't like any mix of metric and imperial on a restored car personally. so I will redo that job later. I didn't measure the thread, but it matched the new wheel cylinders and also the old ones which had fittings with imperial flats.

Anyway iif it really is true brake shops cant get fittings with imperial flats anymore, maybe its worth saving the old fittings if they are in good nick. P.S. The recent series of Sidchrome spanners have that little notch in the open end side. I've found these heaps better for cracking those tight semi seized 20 year old fittings without distorting the flats than the previous style. (Having two notched 3/8th spanners even better.) Drop of penetrene a few hours before, and they come off like new.