Improving hand brake - ideas?

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MarkHawkins
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Re: Improving hand brake - ideas?

Post by MarkHawkins » Tue May 02, 2017 5:27 pm

An update :
So far we have replaced the cable, the wheel cylinders, the shoes, welded and flattened the small groves in the back plates, reassembled with copper grease on the sliding wheel cylinders. The hand brake holds the car on a hill and locks the rear wheels on gravel but not on good tarmac - still not enough to make the 25%
The new handbrake cable is greased and I don't believe I have it running through too tight an angle.


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Re: Improving hand brake - ideas?

Post by peter freeman » Tue May 02, 2017 5:41 pm

That only leaves the drums and connection point the the bottom of the handbrake lever. It was a mod to drill the Coupe lever to increase the pulling power IIRC.



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Re: Improving hand brake - ideas?

Post by peter freeman » Tue May 02, 2017 5:55 pm

Holes to adjust pulling power - knew I had a drawing somewhere. Fit closer to pivot point to increase movement/pulling power.
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Re: Improving hand brake - ideas?

Post by MarkHawkins » Thu May 04, 2017 9:06 pm

Are coupe handbrakes levers the same as those on later more numerous cars?


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Re: Improving hand brake - ideas?

Post by scimjim » Thu May 04, 2017 9:18 pm

I think the straight six have fly off hand brakes? What we really need to know is if a small sports handbrake will fit a v6 coupe?


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Re: Improving hand brake - ideas?

Post by DARK STAR » Thu May 04, 2017 9:22 pm

V6's have fly-off handbrakes too, at least mine has ...


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Re: Improving hand brake - ideas?

Post by philhoward » Thu May 04, 2017 9:31 pm

If a 5/a one will fit, then a small sports one will.

I thought that picture from Peter was a Coupe one - it's a 5a one.


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Re: Improving hand brake - ideas?

Post by MarkHawkins » Thu May 04, 2017 9:48 pm

We don't have a turnbuckle at present - just the two steel strips so moving the pivot point may be more problematic.. A 5a cable was fitted - slightly longer than than the previous cable but as both ends of the outer cable are fixed, should that be a problem? When I viewed the freshly built up V6 coupe chassis at QRG the other month it all looked so clean and simple ...


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Re: Improving hand brake - ideas?

Post by peter freeman » Thu May 04, 2017 9:52 pm

Yes its a 5A one but drilling the hole is a mod to the Coupes as well. I think Chris that the 4B's have the fly off handbrake - my 4A does not - don't know about the other 4's.



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Re: Improving hand brake - ideas?

Post by MarkHawkins » Thu May 04, 2017 10:13 pm

In operation HBL's hand brake feels just like that on ALJ - there is a ratchet mechanism and you can partially apply or release the hand brake so I don't think its 'fly off'.


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1968 '4b Coupe HBL 725G
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1977 '6a M/overdrive - OPJ 62R

ex 1974 '5a auto - VLN 826M
ex 1985 GTC M/overdrive B205 AMT - number 413
ex 1984/85 SS1 number 0007 (1300)

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Re: Improving hand brake - ideas?

Post by Roger Pennington » Thu May 04, 2017 11:28 pm

There's a thread about Coupe handbrakes (and fly-offs in particular), here in the members' archive, which might be some help?


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Re: Improving hand brake - ideas?

Post by scimjim » Fri May 05, 2017 8:44 am

So it looks like the coupes with a fly-off handbrake have a bracket from the chassis but do the coupes with a "normal" handbrake have that bracket? If not, I expect it could be a straight swap for a later handbrake?


Jim King

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
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Re: Improving hand brake - ideas?

Post by DARK STAR » Sat May 06, 2017 5:51 pm

Just thought of that myself, I was puzzled why mine was so different - and I had to shorten the SE5a cable outer by 3 cm.


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Re: Improving hand brake - ideas?

Post by MarkHawkins » Sun May 07, 2017 9:22 pm

Comparing the exiting hand brake and the 'new' SS1 hand brake they appear the same apart from the orientation of the fitting holes. On the Coupe the are alternate sides but the SS1 brake has both holes on one side. Would it be feasible to use localised heat to bend the mount to the other side, or possibly but cut and weld it?


Custodian of :

1968 '4b Coupe HBL 725G
1972 '5a M/overdrive ALJ 513K - ALJ 513K
1977 '6a M/overdrive - OPJ 62R

ex 1974 '5a auto - VLN 826M
ex 1985 GTC M/overdrive B205 AMT - number 413
ex 1984/85 SS1 number 0007 (1300)

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Re: Improving hand brake - ideas?

Post by scimjim » Sun May 07, 2017 10:19 pm

I expect it would bend with some heat.


Jim King

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), Sabre/MX5 auto (The Flying Broomstick),
1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

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