[Morris] Brake problems

[Kevin Wayne Williams]

You are on the right track. I disconnected a flex hose as the chassis 
side, and the brakes remained locked. Disconnected that hose at the 
caliper side, and it freed itself. No compressor handy, but you can't 
blow air through the hose with lung pressure.

I'll try to get my local NAPA to make a set. Here in South America, it 
doesn't matter whether you import things from the US or Britain, 
shipping times and costs are outrageous.

KWW

Gerard Chateauvieux wrote:
> Well, as I mentioned, I doubt that the residual valve alone would cause 
> that severe of a problem, but it would contribute seriously if the hoses 
> were blocked. The other issue would be if the push rod was incorrectly 
> set, but since that hasn't changed, probably not an issue either. You 
> can check if this is the problem by removing the hoses and seeing if you 
> can get any compressed air through them, but they aren't terribly 
> expensive and is a good thing to do at it's age anyway.
> 
> There should be a few US suppliers that will carry the hoses (Minimania, 
> Mini City, Jim in Marcola) otherwise, I order stuff from ESM. 
> http://www.morrisminorspares.co.uk/
> 
> Gerard
> 
> On Oct 26, 2008, at 11:51 AM, Kevin Wayne Williams wrote:
> 
>>
>> Randy Williams did the initial conversion before I bought the truck 
>> from him. It worked find for 8 years/30000 miles. I don't know if he 
>> did a rebuild then or not. I didn't rebuild it when I replaced the 
>> calipers. He monitors this list, so he might chime in and let me know.
>>
>> Flex hose collapse? I guess I can get new hoses made up on the island 
>> and give it a try.
>>
>> KWW
>>
>> Gerard Chateauvieux wrote:
>>> Hi Kevin,
>>> I would investigate the condition of the flex hoses. They will 
>>> collapse internally and restrict or even completely block fluid 
>>> return. The other possibility/complication would be if you left the 
>>> residual valve in the master cylinder, but I doubt that alone would 
>>> cause your condition. Did you rebuild the MC when you installed the 
>>> disc brakes?
>>> Gerard
>>> On Oct 26, 2008, at 11:09 AM, Kevin Wayne Williams wrote:
>>>>
>>>> I have a Spridget disk conversion on my Minor that served me happily 
>>>> for     about 30000 miles. Recently, I started to have brake drag 
>>>> problems, and decided that the front calipers were shot, because I 
>>>> could not get the pistons to retract freely. Replaced the calipers, 
>>>> and all seemed well. The truck took a few months off, and I got back 
>>>> in it this week. It would run fine for a while, and then the brakes 
>>>> would begin to drag, and they were glowing red hot the other night.  
>>>> Now, all four brakes are locked.
>>>>
>>>> Is there some kind of valve in the caliper that I was supposed to 
>>>> have disabled? Or is this just a problem with my master cylinder not 
>>>> retracting properly?
>>>>
>>>> KWW