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Re: Fitting new brakes and cylinders
Posted: Wed Nov 12, 2025 5:47 pm
by svenedin
Bill_qaz wrote: ↑Wed Nov 12, 2025 5:25 pm
Yes Berni yours looked good, mine from a different supplier were impossible to fit as the open end of the hook was longer than the gap on backplate. I initially left them off as it had none fitted when i took it apart, so had no OE spring to compare with. Once I figured out the issue and shortened them they went on easily just using pliers.
Screenshot_20251112-173611_Samsung Internet.jpg
It gets annoying how many of the pattern parts sold are either not to spec or poor quality. The problem with mail order is you can't see the item in the flesh and it's often is not what is shown in the description.
Absolutely. What annoys me even more is that the suppliers carry on selling the faulty parts even after numerous customers have complained! They treat us as if we are fools. It's like a cafe selling a ham sandwich and a customer complaining that it isn't a ham sandwich it's beef. The waiter says sorry and then does exactly the same thing to the next customer!
Stephen
Re: Fitting new brakes and cylinders
Posted: Wed Nov 12, 2025 6:41 pm
by ttwlr
Bill_qaz wrote: ↑Wed Nov 12, 2025 5:25 pm
Yes Berni yours looked good, mine from a different supplier were impossible to fit as the open end of the hook was longer than the gap on backplate. I initially left them off as it had none fitted when i took it apart, so had no OE spring to compare with. Once I figured out the issue and shortened them they went on easily just using pliers.
Screenshot_20251112-173611_Samsung Internet.jpg
It gets annoying how many of the pattern parts sold are either not to spec or poor quality. The problem with mail order is you can't see the item in the flesh and it's often is not what is shown in the description.
Mine didn't have any, do the help it anyway ?
Re: Fitting new brakes and cylinders
Posted: Wed Nov 12, 2025 7:20 pm
by svenedin
ttwlr wrote: ↑Wed Nov 12, 2025 6:41 pm
Bill_qaz wrote: ↑Wed Nov 12, 2025 5:25 pm
Yes Berni yours looked good, mine from a different supplier were impossible to fit as the open end of the hook was longer than the gap on backplate. I initially left them off as it had none fitted when i took it apart, so had no OE spring to compare with. Once I figured out the issue and shortened them they went on easily just using pliers.
Screenshot_20251112-173611_Samsung Internet.jpg
It gets annoying how many of the pattern parts sold are either not to spec or poor quality. The problem with mail order is you can't see the item in the flesh and it's often is not what is shown in the description.
Mine didn't have any, do the help it anyway ?
Oh dear, I see flashing lights and I can hear a klaxon. It's the argument keywords "beehive springs" again
BMC fitted beehive springs for a reason so yes they are supposed to be there. They can be tricky to fit so some people don't bother. Their job is to hold the shoes against the backplate.
Stephen
Re: Fitting new brakes and cylinders
Posted: Wed Nov 12, 2025 7:21 pm
by les
They hold the shoes against the back plate, some folk leave them off because they find them difficult to fit, not a particularly good reason however !
Re: Fitting new brakes and cylinders
Posted: Wed Nov 12, 2025 7:22 pm
by les
Sorry Stephen, you posted as I was writing !
Re: Fitting new brakes and cylinders
Posted: Wed Nov 12, 2025 7:37 pm
by ttwlr
Oh no what have I started
I'm sure I see some in my spares box, so I'll give it ago, as you say, was there for a reason.
svenedin wrote: ↑Wed Nov 12, 2025 7:20 pm
ttwlr wrote: ↑Wed Nov 12, 2025 6:41 pm
Bill_qaz wrote: ↑Wed Nov 12, 2025 5:25 pm
Yes Berni yours looked good, mine from a different supplier were impossible to fit as the open end of the hook was longer than the gap on backplate. I initially left them off as it had none fitted when i took it apart, so had no OE spring to compare with. Once I figured out the issue and shortened them they went on easily just using pliers.
Screenshot_20251112-173611_Samsung Internet.jpg
It gets annoying how many of the pattern parts sold are either not to spec or poor quality. The problem with mail order is you can't see the item in the flesh and it's often is not what is shown in the description.
Mine didn't have any, do the help it anyway ?
Oh dear, I see flashing lights and I can hear a klaxon. It's the argument keywords "beehive springs" again
BMC fitted beehive springs for a reason so yes they are supposed to be there. They can be tricky to fit so some people don't bother. Their job is to hold the shoes against the backplate.
Stephen
Re: Fitting new brakes and cylinders
Posted: Wed Nov 12, 2025 7:53 pm
by svenedin
les wrote: ↑Wed Nov 12, 2025 7:22 pm
Sorry Stephen, you posted as I was writing !
We both said the same thing!
Stephen
Re: Fitting new brakes and cylinders
Posted: Wed Nov 12, 2025 7:58 pm
by Bill_qaz
Having spent my whole working life in various parts of the motor industry, I'm positive if the manufacturer fitted them it was for good reason.
If we could avoid fitting a washer it was a cost saving x output = more profit.
Common on drumbrakes in various designs even on trucks and buses often referred to as anti rattle.
Re: Fitting new brakes and cylinders
Posted: Wed Nov 12, 2025 8:26 pm
by svenedin
Every time this subject is raised, I have wondered why beehive springs are fitted at the back but not on the front brakes.
I think the answer is in section M23 of the workshop manual. The early shoe abutment pads "show a tendency to tear away from the backplate". The beehive springs would help to reduce any side load on the abutment pad. Later backplates have the abutment pad welded in position. The front shoes are retained by the cylinders as there is no abutment pad.
Stephen
Re: Fitting new brakes and cylinders
Posted: Thu Nov 13, 2025 12:03 pm
by ttwlr
Found 3 original and 3 new types, but bit off new one, just about to fit, got one new one on, bottom one driving me mad, just not having it.

- PXL_20251113_120054073.jpg (712.76 KiB) Viewed 11489 times
Bill_qaz wrote: ↑Wed Nov 12, 2025 12:43 pm
If you are replacing the beehive springs, the hooks on replacements are too long. Put them in vice or vive grips and use a hacksaw to shorten the hook, it makes fitting much easier, more like originals.
Screenshot_20251112-123830_Google.jpg
Re: Fitting new brakes and cylinders
Posted: Thu Nov 13, 2025 12:35 pm
by ttwlr
Re: Fitting new brakes and cylinders
Posted: Thu Nov 13, 2025 1:30 pm
by Bill_qaz
Well done

Re: Fitting new brakes and cylinders
Posted: Thu Nov 13, 2025 1:51 pm
by ttwlr
Bill_qaz wrote: ↑Thu Nov 13, 2025 1:30 pm
Well done
Thanks for the cutting tip,

Re: Fitting new brakes and cylinders
Posted: Thu Nov 13, 2025 1:58 pm
by svenedin
Marvellous. Well done!
Leave the handbrake disconnected and adjust the brakes. Give some hard pedal presses to centralise the shoes and then go to the adjuster. Then connect the handbrake cable and check it. It should be possible to rotate the drums with heavy effort on the 3rd click of the handbrake pawl. The braking must be equal on both sides. Usually it is not necessary to adjust the handbrake but I found I had to after changing the cylinders. The brakes must be adjusted correctly BEFORE touching the handbrake adjustment.
Stephen
Re: Fitting new brakes and cylinders
Posted: Thu Nov 13, 2025 2:59 pm
by ttwlr
Thank you Steven, I shall keep that in mind when doing them.
Re: Fitting new brakes and cylinders
Posted: Thu Nov 13, 2025 9:17 pm
by geoberni
svenedin wrote: ↑Wed Nov 12, 2025 8:26 pm
Every time this subject is raised, I have wondered why beehive springs are fitted at the back but not on the front brakes.
I think the answer is in section M23 of the workshop manual. The early shoe abutment pads "show a tendency to tear away from the backplate". The beehive springs would help to reduce any side load on the abutment pad. Later backplates have the abutment pad welded in position. The front shoes are retained by the cylinders as there is no abutment pad.
Stephen
The far greater mystery is why nobody has retaining springs on the front brakes and the backing plates do not even have holes for retaining spring pins, yet the parts manual details them....

- front retainer.JPG (101.2 KiB) Viewed 11422 times
ESM even sell the spring (17H7969) and Retainer (17H7971), but not the pins......
.
.
LCV have the same parts from early 1962 period...

- LCV Front.JPG (53.16 KiB) Viewed 11422 times
All I know is that my car has been retrofitted with latter 8" fronts and there are no holes for fitting that type of retainer spring.

Re: Fitting new brakes and cylinders
Posted: Thu Nov 13, 2025 9:34 pm
by svenedin
geoberni wrote: ↑Thu Nov 13, 2025 9:17 pm
svenedin wrote: ↑Wed Nov 12, 2025 8:26 pm
Every time this subject is raised, I have wondered why beehive springs are fitted at the back but not on the front brakes.
I think the answer is in section M23 of the workshop manual. The early shoe abutment pads "show a tendency to tear away from the backplate". The beehive springs would help to reduce any side load on the abutment pad. Later backplates have the abutment pad welded in position. The front shoes are retained by the cylinders as there is no abutment pad.
Stephen
The far greater mystery is why nobody has retaining springs on the front brakes and the backing plates do not even have holes for retaining spring pins, yet the parts manual details them....
front retainer.JPG
ESM even sell the spring (17H7969) and Retainer (17H7971), but not the pins......
.
.
LCV have the same parts from early 1962 period...
LCV Front.JPG
All I know is that my car has been retrofitted with latter 8" fronts and there are no holes for fitting that type of retainer spring.
Yes and if you look at workshop manual figure M23 there is an illustration of the front brakes and no retaining springs are shown. It is an illustration of 7" front brakes because it says "front shoes are interchangeable with rear leading shoes" which is only possible with 7" front brakes.
Stephen
Re: Fitting new brakes and cylinders
Posted: Mon Nov 24, 2025 11:38 am
by myoldjalopy
les wrote: ↑Wed Nov 12, 2025 7:21 pm
They hold the shoes against the back plate, some folk leave them off because they find them difficult to fit, not a particularly good reason however !
I've never fitted them, not because they are difficult to fit, but because none of my cars ever had them - and I have never had any issues without them.....and that's going back over 40 years!
Re: Fitting new brakes and cylinders
Posted: Mon Nov 24, 2025 1:38 pm
by svenedin
myoldjalopy wrote: ↑Mon Nov 24, 2025 11:38 am
les wrote: ↑Wed Nov 12, 2025 7:21 pm
They hold the shoes against the back plate, some folk leave them off because they find them difficult to fit, not a particularly good reason however !
I've never fitted them, not because they are difficult to fit, but because none of my cars ever had them - and I have never had any issues without them.....and that's going back over 40 years!
In actual fact, during my ownership my car ran without beehive springs for over 30 years. It didn't have them fitted when I got the car and I didn't know any better. Then I became convinced that they must have some important purpose so I fitted them but the reality is I have never heard a very convincing argument about what that important purpose is. I agree with the argument that BMC wouldn't have used them unless they were important and would have deleted them to save a few pennies but no engineer has ever told me why they are there!
Stephen
Re: Fitting new brakes and cylinders
Posted: Mon Nov 24, 2025 2:33 pm
by geoberni
svenedin wrote: ↑Mon Nov 24, 2025 1:38 pm
In actual fact, during my ownership my car ran without beehive springs for over 30 years. It didn't have them fitted when I got the car and I didn't know any better. Then I became convinced that they must have some important purpose so I fitted them but the reality is I have never heard a very convincing argument about what that important purpose is. I agree with the argument that BMC wouldn't have used them unless they were important and would have deleted them to save a few pennies but no engineer has ever told me why they are there!
Stephen
They basically hold the shoes in place against the backing plate.
The reasons for fitting them can be varied, depending on what is found during prototype development and road tests, but they were very common with drum brakes, most cars had them on the front and rear.
Shoes can slip, slide, jump, judder, any unfavourable movement is eliminated by the retaining springs.
Last year I fitted new ones to the rear of Basil, because they were very different lengths and not serving much purpose.

- 20241110_162459.jpg (871.21 KiB) Viewed 10922 times
I'd fitted new shoes all round a few months earlier and I wasn't happy with a bit of Judder that was evident.
The rears were giving a very odd wear pattern, consistent with judder.....

- Shoewear.JPG (156.78 KiB) Viewed 10922 times