brake master cylinder failed

Discuss mechanical problems here.

Moderator: Moderators

cococola
Minor Fan
Posts: 179
Joined: Sun Apr 21, 2013 10:30 pm
MMOC Member: Yes

brake master cylinder failed

Postby cococola » Thu May 16, 2019 12:19 am

My Traveller master cylinder has failed resulting in loss of brakes so I wonder if anybody has had any success at fitting a repair kits atall?
I fitted one on my previous Morris and I still had to fit a new replacement unit afterwards, so is there a method to fitting or where would be the best place to purchase please?
Morris Minors..... such fun :D

ianmack
Minor Addict
Posts: 546
Joined: Sat Jul 05, 2014 7:02 pm
MMOC Member: No

Re: brake master cylinder failed

Postby ianmack » Thu May 16, 2019 7:17 am

I think the consensus on Minor master cylinders is that new seals are inadvisable. Even if the old cylinder looks ok new seals do not always make for a good repair, as you have found, and in the case of the Minor the awkward location means that having to then do the job twice is a real pain.

A new cylinder is probably the safest route and all the regular suppliers stock them.

ManyMinors
Minor Legend
Posts: 1326
Joined: Tue Nov 11, 2014 9:41 am
MMOC Member: No

Re: brake master cylinder failed

Postby ManyMinors » Thu May 16, 2019 7:42 am

I wouldn't personally bother fitting new seals for the reasons mentioned above. The other thing worth mentioning is that there is a cheaper "pattern" master cylinder available. My Minor had just had one of these fitted prior to my purchase - they have a square filler plug. It started leaking soon afterwards and after regularly re-filling it for a couple of months I bit the bullet and bought a Lockheed one which has given me trouble-free motoring ever since. These can be bought on ebay and suchlike for around £75.00. Your life depends on your brakes really, so it isn't a huge price.

paul 300358
Minor Fan
Posts: 132
Joined: Thu May 11, 2017 8:23 pm
MMOC Member: Yes

Re: brake master cylinder failed

Postby paul 300358 » Thu May 16, 2019 8:19 pm

I totally agree with all the above. Due to the position of the master cylinder, they usually suffer corrosion pits in the bore. Fitting new seals are a waste of time and money as the fluid leaks past the pits.

cococola
Minor Fan
Posts: 179
Joined: Sun Apr 21, 2013 10:30 pm
MMOC Member: Yes

Re: brake master cylinder failed

Postby cococola » Thu May 16, 2019 8:57 pm

Many thanks for the valuable feedback I have just purchased a new one off Ebay for £75 so time to prepare for a nice awkward job.
Morris Minors..... such fun :D

Bowie69
Minor Friendly
Posts: 49
Joined: Thu May 28, 2015 10:07 pm
MMOC Member: No

Re: brake master cylinder failed

Postby Bowie69 » Thu May 16, 2019 10:45 pm

They aren't all that awkward at all really... Good luck :)

Declan_Burns
Minor Legend
Posts: 1720
Joined: Wed Apr 18, 2007 7:32 am
MMOC Member: No

Re: brake master cylinder failed

Postby Declan_Burns » Fri May 17, 2019 9:08 am

You may find that some of the new master cylinders are a tad wider than the originals and will not fit inside the chassis leg without dressing with an angle grinder.


Regards
Declan

cococola
Minor Fan
Posts: 179
Joined: Sun Apr 21, 2013 10:30 pm
MMOC Member: Yes

Re: brake master cylinder failed

Postby cococola » Sun May 19, 2019 2:18 pm

Well today I started the removal of the brake master cylinder and after alot of fiddle the brake pipe/banjo connection snapped off and I have to order a new one :( Ive removed the master cylinder ready so Iam at a standstill until the connector arrives.
Morris Minors..... such fun :D

philthehill
Minor Maniac
Posts: 6064
Joined: Thu Jul 19, 2012 12:05 pm
MMOC Member: Yes

Re: brake master cylinder failed

Postby philthehill » Sun May 19, 2019 2:33 pm

To keep you going you could temporarily rob the adapter bolt off a rear cylinder.

The adapter bolt Pt No: 27H7167 is the same item as fitted to the master cylinder and the rear brake cylinder.

The banjo is also the same Pt No: 27H7189.

To remove and replace the rear cylinder banjo and bolt is easier and much quicker than the master cylinder banjo and bolt and you will still have to bleed the rear brakes anyway

If you have not got new copper washers just anneal those that you have.

At least worth a consideration.



Who is online

Users browsing this forum: No registered users and 5 guests