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New ABS switch delivered yesterday


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1 hour ago, ian29gte said:

Interesting, thanks.

I still reckon the Hydac would be a better bet long term if you're sticking with the Delco. I'm still undecided, all the time mine appears to be working. I don't really want to spend any money on the Delco, only to find something on it fails!

Did you get another daily-driver then, Richard?

Oh ya, we have 8 months of winter here, so I keep my winter car insured all year round, lol.

 

Although I must say that on these sunny days I feel a bit depressed knowing the ole Lotus is parked in the garage.  Seems so wrong. :(  

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  • 2 weeks later...

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Put the switch back together and surprisingly it seems to work.  I cycled it a few times in the garage and am now back on the road, albeit nervously!

 

I didn't do enough to the switch though, so I'm not ready to declare it fixed.  But at least I know I can take it apart and successfully reassemble it.

 

Oddly, I had the accumulator and switch off for 2 weeks and haven't bled the brake system yet.  Brakes feel normal and I'm getting 5-6 presses between pump cycles.  I was expecting to need a complete flush and was prepared for the pump to cycle every couple presses.  I am going to drive a bit before bleeding.  Perhaps driving will push the air into the brake lines?  Or maybe it stays in the accumulator?  I'm not yet confident this is a permanent fix.

 

Also, seeing how the pressure switch diaphragm "flips", I will press the brakes a few times after parking it for the winter so the diaphragm can flip back to its relaxed position.  That seems more logical than leaving it flexed all winter! 

 

(And I will still grab one of Ralf's switches if/when I get in touch with him.)  But I'm back on the road. :)

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On 15/08/2016 at 16:46, Richard123 said:

Oddly, I had the accumulator and switch off for 2 weeks and haven't bled the brake system yet.  Brakes feel normal and I'm getting 5-6 presses between pump cycles.  I was expecting to need a complete flush and was prepared for the pump to cycle every couple presses.  I am going to drive a bit before bleeding.  Perhaps driving will push the air into the brake lines?  Or maybe it stays in the accumulator?  I'm not yet confident this is a permanent fix.

Hi Richard,

In case it helps....

When I first started playing around with the accumulator/pressure switch on the brake system I was also very concerned about needing to bleed the whole system, but this should never be neccessary. I suggest that you don't even attempt to do any bleeding.

There is no link between the fluid in the two parts of the reservoir.

The fluid that feeds the front brakes is only taken fron the from the front part of the reservoir and nothing you do with the accumulator/pressure switch affects this part, the fluid in the rear part of the reservoir is used to charge the accumulator and to feed the rear brakes.

The accumulator/pressure switch part of the system is self bleeding, whenever you de-pressurise / re-pressurise it it bleeds itself, air cannot get into the rear lines (unless you do try to bleed them!).

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10 minutes ago, PaulEspritGT3 said:

Hi Richard,

In case it helps....

When I first started playing around with the accumulator/pressure switch on the brake system I was also very concerned about needing to bleed the whole system, but this should never be neccessary. I suggest that you don't even attempt to do any bleeding.

There is no link between the fluid in the two parts of the reservoir.

The fluid that feeds the front brakes is only taken fron the from the front part of the reservoir and nothing you do with the accumulator/pressure switch affects this part, the fluid in the rear part of the reservoir is used to charge the accumulator and to feed the rear brakes.

The accumulator/pressure switch part of the system is self bleeding, whenever you de-pressurise / re-pressurise it it bleeds itself, air cannot get into the rear lines (unless you do try to bleed them!).

That definitely helps Paul.  Helps my nervous system that is!!  

I was wondering how I could possibly be getting more pedal presses between pump cycles with all that air being compressed in the lines.  Your explanation makes perfect sense and fits with my current experience.  

I'm only a few days in, but the pressure switch and complete braking system has been behaving.  The sun is shining, I'm driving an Esprit, and there is no need to bleed the brakes.  Life is good, innit?  (He says as he knocks on wood.)  

Thanks again. 

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  • 3 months later...

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