Improving hand brake - ideas?

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Roger Pennington
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Re: Improving hand brake - ideas?

Post by Roger Pennington » Tue Apr 04, 2017 2:10 pm

Also, are the wheel cylinders definitely free to slide on the backplate?


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Re: Improving hand brake - ideas?

Post by MarkHawkins » Wed Apr 05, 2017 12:44 pm

I used the method described in the manual - wheel off ground, turn adjuster until wheel locked then back off slightly so it rotated.
Drums are clean and shiny inside
Brake shoes seem to have plenty of substance left.

Have tried with and without the Don Kennedy split nuts - neither give a hand brake good enough to pass the test (stricter for single line braking systems apparently) . My next call was to check the sliding of the wheel cylinders again - they are loose and slide if not under load but possibly could be binding under load if my greasing was inadequate.


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Re: Improving hand brake - ideas?

Post by steve bryant » Wed Apr 05, 2017 12:49 pm

do these cylinders have the L shaped lever on them for the hand brake cable to connect to. [ the inner part of the lever LIFTS the brake shoe???]



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Re: Improving hand brake - ideas?

Post by philhoward » Wed Apr 05, 2017 2:43 pm

Has the handbrake lever got two holes where the turnbuckle fits? Bottom hole reduces travel, top hole increases leverage on the shoes but if they aren't free to move (cylinders free as mentioned before) then it still won't exert enough pressure on the drums.


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Re: Improving hand brake - ideas?

Post by MarkHawkins » Wed Apr 05, 2017 2:54 pm

Not sure about the 2 holes - they were there on ALJ the 5a (but we chose the wrong hole as being upside down caused confusion) - I couldn't see the end of the handbrake lever underneath, just the pulley. I think re greasing the wheel cylinders is the next step.


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Re: Improving hand brake - ideas?

Post by peter freeman » Wed Apr 05, 2017 3:24 pm

From the service bulletins.
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HB adjustment.jpg
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Re: Improving hand brake - ideas?

Post by MarkHawkins » Wed Apr 05, 2017 3:58 pm

So that would be the two thin(ish) metal bars that currently have a single hole through them with an alloy pulley between them held in by a clevis pin? The handbrake end seems quite hidden at the moment - does the lever itself need removing?
I note that the bulletin says 'GTE' - would it cover a late '68 GT as well?


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Re: Improving hand brake - ideas?

Post by peter freeman » Wed Apr 05, 2017 4:04 pm

That instruction is for the 5 and 5A's - not taken too much notice of my Coupe's handbrake but I think it is the same - my handbrake is fine so perhaps its been done.



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Re: Improving hand brake - ideas?

Post by peter freeman » Wed Apr 05, 2017 4:12 pm

This pic is from the Coupe manual - a second hole nearer the pivot point of the handbrake lever is one of the other mods done to improve the handbrake. Arrow points to the original hole.
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Re: Improving hand brake - ideas?

Post by MarkHawkins » Wed Apr 05, 2017 4:26 pm

Looks to me like we have the '5a conversion' - the adjustments are at the road wheel end and the pulley is held in by two non adjustable metal strips.


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Re: Improving hand brake - ideas?

Post by peter freeman » Wed Apr 05, 2017 5:22 pm

The S6 uses the same system as shown above ( I have looked at the manual ). I have been out to look at our Coupe ( not underneath ) as I was intrigued by the extra pivot hole in the curved bracket above the red arrow. I cannot see one on our car so it may be that that hole is where our handbrake is pivoted and the hole that is used as the pivot point in the drawing is covered by the handbrake lever and is out of sight.



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Re: Improving hand brake - ideas?

Post by monkey » Wed Apr 05, 2017 7:18 pm

Hi guys, been following this thread with interest and although I have a coupe, its far from being on the road for me to worry about the handbrake yet!!

I do have a Triumph Stag though and I did have a similar problem with the MOT. When I rebuilt the the rear brakes I fitted new shoes and had a pair of spare brake drums skimmed. Smug in the knowledge that everything should be o.k. I was shocked when it failed on low efficiency, I tried all manner of adjustments to no avail. Then I fitted the old scored drums and guess what, it flew through. I never have fitted the skimmed drums.

Regarding the the linkage mods shown in the two drawings for the SE5 and Coupe they do seem to contradict each other, the se5 mod seems to shorten the cable whilst coupe one seems to lengthen it. Or am I mis-reading the drawings?


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Re: Improving hand brake - ideas?

Post by scimjim » Wed Apr 05, 2017 7:22 pm

MarkHawkins wrote:Looks to me like we have the '5a conversion' - the adjustments are at the road wheel end and the pulley is held in by two non adjustable metal strips.
Fit a turnbuckle? I have some from small sports.


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Re: Improving hand brake - ideas?

Post by philhoward » Wed Apr 05, 2017 9:46 pm

The handbrake lever itself is even the same (5a and SS1).


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Re: Improving hand brake - ideas?

Post by MarkHawkins » Thu Apr 06, 2017 12:43 pm

This is a picture of the pulley end - seems to be without a turn buckle.
How much side to side play is acceptable in the brake levers that go into the drum?
brakepulley.jpg
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Custodian of :

1968 '4b Coupe HBL 725G
1972 '5a M/overdrive ALJ 513K - ALJ 513K
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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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