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Rear Brakes - Two Questions

Posted: Sat Dec 31, 2011 6:26 am
by David53
Having the whole rear end apart I decided to take the opportunity to renew the brakes as well as new shoes and cylinders are so affordable. What a pain of a job! The springs were so strong that parting the shoes enough to slide in the adjuster was almost impossible. Finally got it all together though. Two questions:

Beehive Springs - are they really required? Tried numerous times to refit with a pair of long nosed pliers but eventually gave up as the pliers kept slipping on the spring. I could invest in a better pair of pliers (the ones I have are quite small and prob don't have enough grip) but are the springs really neccessary?

Secondly, re bleeding. I know Roy has a method he favours of letting gravity do the work - does the wheel cylinder need to be lower than the master cylinder for this to work, and do I just give the pedal a few pumps to get it started?

Re: Rear Brakes - Two Questions

Posted: Sat Dec 31, 2011 8:37 am
by mike.perry
Fit shoes, springs and adjuster onto cylinder, then lever the fixed end of the shoe into position with the flat of a screwdriver. Keep fingers clear.
A push and twist with a long nose pliers usually works as long as the shoes are centralised but beehive springs are not essential.
I prefer to use two people to bleed the brakes but if one person, then the wheel cylinder should be the lowest point

Re: Rear Brakes - Two Questions

Posted: Sat Dec 31, 2011 11:29 am
by David53
Thanks Mike - yes I would have used the leverage method had the backplates been on the car but for some dumb reason I decided to assemble them on the bench! Never again!!

Re: Rear Brakes - Two Questions

Posted: Sat Dec 31, 2011 12:08 pm
by bmcecosse
The tube from the cylinder goes down into a jar on the floor with a little fluid in it - so the syphon runs down to floor level (minus the depth of fluid in the jar of course) - it works in Ecosseland- dunno about where you are.......

Re: Rear Brakes - Two Questions

Posted: Sat Dec 31, 2011 12:27 pm
by David53
Thanks Roy will give it a try. You never know - it might run upwards!

Re: Rear Brakes - Two Questions

Posted: Sun Jan 01, 2012 8:36 am
by David53
Job all complete, rebuilt diff lovely and quiet - no more clunk clunk clunk! Brakes work well and handbrake now holds her on a hill. Being a Morrie though she did have one surprise for me. The front RH wheel bearing chose this moment to fail, resulting in a horrible growling noise. Of course I assumed it was the rebuilt diff but after much scratching of head and the feeling it was coming from the front of the car I checked and found the inner bearing shot. I didn't believe it possible as I had renewed it only 6 months ago. The quality of modern replacement parts leaves much to be desired.

Re: Rear Brakes - Two Questions

Posted: Sun Jan 01, 2012 9:20 am
by mike.perry
I am using pre greased sealed bearings on the front hubs, no more grease over everything when I take the brake drums off

Re: Rear Brakes - Two Questions

Posted: Sun Jan 01, 2012 9:32 am
by David53
Where do you get these from Mike? Does the grease not wear out over time?

Re: Rear Brakes - Two Questions

Posted: Sun Jan 01, 2012 11:23 am
by mike.perry
From my local bearing suppliers. The bearings are sealed which stops grit getting in and they reckon that they will last longer. I have had one side in for about three years with no problems.

Re: Rear Brakes - Two Questions

Posted: Sun Jan 01, 2012 3:01 pm
by bmcecosse
Usually it's the same bearing number with '2RS' added after the number 2RS = 2 Rubber Seals
You don't tell us - did the gravity bleeding do the job ???? :D

Re: Rear Brakes - Two Questions

Posted: Sun Jan 01, 2012 4:36 pm
by katy
FWIW, Sealed bearings in machinery are typically called for to be replaced every 25,000 hours.

Happy New Year to all, Ken

Re: Rear Brakes - Two Questions

Posted: Sun Jan 01, 2012 4:59 pm
by mike.perry
25,000hrs at 30mph = 750,000 miles. That's long enough for me

Re: Rear Brakes - Two Questions

Posted: Sun Jan 01, 2012 8:21 pm
by David53
Yes it did Roy but it took quite a long time. I finished off with a few "push and hold" releases just to make sure.

Re: Rear Brakes - Two Questions

Posted: Sun Jan 01, 2012 9:16 pm
by bmcecosse
That's when I have my coffee break...... Glad it worked anyway!