hheynow
the misanthrope
jharvey said:Got tired of replacing them so I replaced the truck
Nothing quite like a $40,000 brake job...
Brake problems
- Thread starter wanderer
- Start date
Nothing quite like a $40,000 brake job...
Full Monte
Full Access Member
" When I was pressing the pulley on the new pump, I noticed the difference in how they both acted. I could spin the old pump relatively easy with the pulley, and it would sound like it was working, and it had some suction. The new pump was hard to turn by hand, and had some serious suction. "
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I just had a similar experience. The original pump would meet specs on the vacuum it drew ( I measured it), but it was easy to spin it by hand. The new one I put on was harder to spin, and it works much better. I'm wondering if in addition to the max vacuum pressure it sucks, if there is an issue with the volume capacity of the pump? Could it be that it takes awhile for a weaker pump to pull a vacuum on that big diaphragm and that our newer ones pull it down fast?
_____________________________________________________________
I just had a similar experience. The original pump would meet specs on the vacuum it drew ( I measured it), but it was easy to spin it by hand. The new one I put on was harder to spin, and it works much better. I'm wondering if in addition to the max vacuum pressure it sucks, if there is an issue with the volume capacity of the pump? Could it be that it takes awhile for a weaker pump to pull a vacuum on that big diaphragm and that our newer ones pull it down fast?
