4200 Handbrake parts Cross Reference.

paul328

paul328

Member
Messages
132
We have stripped back brake assembly as the handbrake was not working. The whole handbrake assembly on my car had never been touched and found that the original shoes were worn to the metal on the O/S and delaminating on the N/S. The rest of the components were at best very dirty. The previous owner had a garage replace the back discs and pads about 4000 miles ago and plainly they simply ignored that assembly despite the charges to him.
Based on the earlier posts I bought the SHU726 APEC shoes which I understand will fit. I am looking for a set of Springs for the shoes. APEC web site suggests that even after 2-3 years the springs loose 30% of their tension strength. I can not find an APEC accessory kit that can be used.
Does anyone have a parts cross reference for the springs? The additional components or a cheaper source of supply than Eurospare? I have checked the equivalent Porsche 911 main spring which appear similar, but not sure. Is there and APEC Accessory kit that applies?
We will clean off the entire assembly; replace what springs and components we can then re-assemble. Quite a lot of work, but the advice i have been given is this is the only way to ensure that such an old design oh handbrake works effectively.
 
Gp79

Gp79

Member
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1,399
Check ferrari 599 / 612 I’m sure the springs and even backing plates are the same.
search the part numbers on eurospares, Ferrari parts are usually cheaper and available!
 
Zep

Zep

Moderator
Messages
9,315
paul328 said:
APEC web site suggests that even after 2-3 years the springs loose 30% of their tension strength.
Click to expand...

Yes, I would say that too if I was selling replacement springs.

In reality, unless the springs are rusted they will have more than enough tension to pull back the shoes on a clean assembly. Personally I would clean and inspect, if they are in good condition I would reassemble and then check they move as expected and then call it done.
 
paul328

paul328

Member
Messages
132
Zep said:
Yes, I would say that too if I was selling replacement springs.

In reality, unless the springs are rusted they will have more than enough tension to pull back the shoes on a clean assembly. Personally I would clean and inspect, if they are in good condition I would reassemble and then check they move as expected and then call it done.
Click to expand...
Hi
I think as a matter of common sense all springs lose their tensile strength over time, depending on load use etc. As the strip down is time consuming, I would prefer to simply replace them and that is the advice from the mechanic too.
You are correct that they could be cleaned up etc, but that wouldn't affect loss of tensile stength, which is a usual common cause of failure of springs.

If anyone knows a part cross reference or a cheaper source I would be happy to buy them.

I appreciate your input and views.
 
Zep

Zep

Moderator
Messages
9,315
It’s your dollar, so it’s up to you.

In metallurgical terms springs in tension can suffer from creep (non-yield deformation) but it is usually when they are subjected to high temperatures for long periods and don’t have a suitable surface treatments. The strength of the spring doesn’t reduce to zero over time, unless there is corrosion, which is why I would be fine reusing.
 
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