8 replies to this topic

[oliver122]

Hey guys , so after putting my mini on the road after a rebuild the brake pedal is not returning properly , its just passed it mot a day ago , but i have to lift the pedal with my foot after braking or else the lights stay on , ive also moved the brake switch to see if that helps but nope it doesnt , there does seem abit of slop in the part where the linkages are the bit where the pin goes through and the 2 rods connect to ( dont no what its called ) any help would be great guys

Forgot to mention its a 89 with servo and braided lines

Edited by oliver122, 05 July 2013 - 08:07 PM.

[johnnyblaze]

main pivot shaft through the pedals wiil be seized

[oliver122]

Is that the shaft that the clutch pedal sits on aswell the one inside the car ?

[johnnyblaze]

yes they main shaft through the pedal box both pedal sit on them

[tiger99]

Also, although you may well have done this already, check that the pedal return spring has not broken. Not very common, but anything can break. As you probably know, that spring is vital, as it ensures full retraction of the master cylinder happens, so that the system is open to the reservoir, so that fluid can be admitted to take up pad wear, or released back to the reservoir as it gets hot, to avoid the brakes locking on. It is also vital during bleeding, for the same reasons, so I guess your pedal has been working properly at some stage.

 

But, as already suggested, the problem is usually with the shaft, which may have to be removed, cleaned and lubricated. A right pain, and there is another thread on the forum about the most awkward place on a Mini. Graphite grease is ok, or ordinary LM, which you will have for the nipples etc, but a teflon-based grease as used on bicycles (try Halfords) may be even better. Just don't get it near hot parts. Teflon grease is also good on the gearchange linkage, throttle cable and various other bits.

[1984mini25]

The later servo equipped minis don't have the spring on the brake pedal or the clevis pin in the pedal assembly, instead they have the return spring and 2 plastic sleeved clevis pins in the servo bracket mounted in the engine bay.

[tiger99]

Well, the Somerford web site shows two return springs, one on the crank and the other on the pedal. I think you are correct, and Somerford have mis-named the pedal spring, item 7 below, which is clearly cut down and for the clutch pedal only. The spring on the crank, item 13, effectively fulfils the same function as I described. The clutch return spring provides the same function for the clutch master cylinder. You always need a spring.

 

http://www.somerford...page=page&id=58

[oliver122]

Cheers guys , im missing that spring thats in the engine bay will sort something out before i go

[tiger99]

Incorrect, on a servo setup. The single spring is only used without a servo. The brake end of the spring is not there on servo models. I suggest that you look att the Somerford link I provided, which will make it clear.