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Knorr-Bremse Brake Chambers
Has anyone with Knorr-Bremse brakes ever had to replace a brake chamber due to a failure?
Anyone, anywhere? If so please post age of coach when they were replaced and miles.
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5 Replies
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Jon as you know I replaced two brand new ones after about 5000 miles they where leaking, but you know about that , just thought I would remind you
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I know that and remember. My reason for the question is to see if we can come up with a reasonable time span for replacment as a preventive measure. There is a ton of anecdotal evidence for the common brake chambers and at their relatively cheap prices it is hard to justify going beyond 5 years. Prevost calls for 1 year or 100,000 miles, whichever is first but I don’t believe they even go by those recommendations.
The Knorr-Bremse steer chambers are like conventional ones, but the combo chambers in the rear are proprietary. Trying to see if there is any feedback now that we have a 15 year or greater history of that type.
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I change mine every Five years no matter what!!!!!!!
Edit , I have never had a chamber fail in 25 years this works for me !!!!!
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Tagging on to an old thread but relevant. Despite complete recent replacement of air bags, Norgrens, by prior owners, and all tires by dealer, my coach still has all the original brake chambers. I bought one of each (2 different fronts and one each of drive and tag) and have been carrying them around as spares.
Prevost has them on sale till end of August so I bought the remaining two and now have a complete set. I plan to replace them all when it cools off around here. Maybe rebuild one each of the old ones as spares if I run out things to do with my spare time.
Question is, do the 6 associated brake hoses – or is it 10 because the drive and tag have two air lines each, but I think maybe the second line is metal? – come as service parts or do you have to (or more economically)make /get them locally. I have no problem with tearing it all apart letting it sit, and carrying the 6 or 10 hoses/lines to the local truck parts supplier and having them made up.
Will also probably replace the upper and lower ball joint boots on the front IFS when it is all apart. Any advice/warnings on that? I have all four new boots in hand, and a set of extra large pickle forks.
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David, I replaced my brake chambers and carefully inspected the air hoses going to them and found no reason to replace them at this time. I am going by memory but as I recall you can buy replacement hoses from Prevost and that they are all the same length (cut me some slack here because I think that is the case). So I did buy a couple of hoses as spares.
No magic in replacing the rubber boots and that is the perfect time to insure the ball joints have no slop.
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