hi ,could anyone tell me whats going on with my brakes please,,i put the brakes on and the pedal doesn't come back the way it used to,it comes back very slowly and holds the brakes on, ,i put a new vacum hose on the booster but it has not helped,,your thoughts would be appreciated,,,,
Hi
There is a return spring the pedal that often breaks.
Steve
thanks steve,is the return spring a large round one that is around the pedal arm under the front? and how would you know its broken can you see where it is broken or do you need to dismantle to check it ,thanks in advance
Hi
If its broken it just rattles around on the shaft, I haven't worked on these for about 25 years so my memory is getting dim, I only work on my sons bug or my bug now.
You could always tell when they were broken, the car seemed to be really sensitive to pedal pressure, it almost fell to the floor, and wouldn't release like you said.
If you cant get one, a decent tension spring could probably be mounted in another location.
Steve
hi steve ,,i just disconeted the brake pedal from the booster via the split pin in the linkage and found the pedal worked fine so i am thinking its in the booster somewhere maybe? your or others thoughts much appreciated .
when it comes to your brakes, I would get a brake person to check em out.
😂🤪😂🤪😂
car forums. where a lot of peoples good intentions end up taking a good old car off the road forever never ever to see the road again. 🥲
may also be yr brake hoses and or on a Kombi the proportioning valve
vw54 wrote:may also be yr brake hoses and or on a Kombi the proportioning valve
hi ,,is the proportioning valve attached to the chassie away from the brake booster on a kombi, if it is i seen a small leak out of it ,would or could this be the problem?
yep it is away
thanks guys,, my next adventure is to replace the propertional valve,,,chow for now
ian.mezz wrote:when it comes to your brakes, I would get a brake person to check em out.
This is very good advice,you are playing with peoples lives and not just your own.
Well here's a thread from way back that didn't seem to get closure. I'm bumping it because I have exactly the same problem.
Like komuter's problem, this is causing a big delay in the release of my brakes. I actually find myself reaching down and pulling the brake pedal up with my hand to get moving!
I've worked out that if I pull the vacuum house from the back of the booster, the brake pedal returns as normal. If I put my finger over the hole in the booster that the vacuum hose goes into, the brake pedal return is VERY slow.
I've changed out the master cylinder because my initial thought was that internal leakage past the cups was the problem. The booster is also relatively new having replaced my old one which had seized up.
Any ideas?
76 Kombi (current)
75 Kombi
71 Beetle
69 Beetle
69 Beetle
Check the vaccuum hose. You must use the correct type of hose. Do not use fuel hose, pressure hose or garden hose.
I read it on samba, so it must be correct.
Sometimes Volkswagen dealers sell spare parts. Amazing isn't it!😂
maybe the booster breather hose which is the fwd hose that goes to the chassis rail
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
Hey guys, thanks for your thoughts.
I've eliminated the hoses as potential causes.
The breather hose (front of booster) is free from obstruction and I have the problem whether it's connected or not.
There is plenty of suck on the vacuum hose which makes it highly functional in assisting brake application. The problem is in the release.
While it takes much more effort to apply the brakes with the vacuum hose disconnected from the booster (and blocked off) I have no brake release issues.
Still puzzled!!! 😠
76 Kombi (current)
75 Kombi
71 Beetle
69 Beetle
69 Beetle
The brake pedal pivot is free and not semi siezed?
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
my experience with pedal not returning or too slow to return. both cases was rust in the MC bore. replaced or reco fixed mine. Though like above could be other things.
blocked MC intake ports? return spring, booster, mechanical issues with pedal etc..
71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE
Hmm, master cylinder is brand new. I replaced it because I thought that's where the problem was.
It's nothing to do with the brake pedal mechanicals either, because with the vacuum hose disconnected from the booster, the movement is totally smooth.
Time I took it to an expert I think. Will let you all know the outcome.
76 Kombi (current)
75 Kombi
71 Beetle
69 Beetle
69 Beetle
Booster then....easy to replace with new.
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE
yeah sounds like booster, some valves not working right but the sounds of it.
71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE
matberry wrote:Booster then....easy to replace with new.
Ha! I replaced the booster a few months ago with a new one and things were working fine for a while.
I certainly wouldn't have described the job as easy though because the bolts on the new booster didn't line up. It was actually a pain in the a* se!
76 Kombi (current)
75 Kombi
71 Beetle
69 Beetle
69 Beetle
Are the hoses proper vaccuum hoses? Don't just look for blockages.
I read it on samba, so it must be correct.
Sometimes Volkswagen dealers sell spare parts. Amazing isn't it!😂
