Dodgy brakes

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Dodgy brakes

Post by rich the mechanic on Mon May 21, 2012 8:21 pm

Does anyone know if the brake pipes fittings on the vans are metric or imperial? Our LSPV has started leaking and I need to drive the van so want a tempory fitting so I can try and fix the valve or sorce another and Clare has just found that as of 31st January 2013 Diahatsu will no longer be imported.
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Re: Dodgy brakes

Post by Logi on Mon May 21, 2012 8:25 pm

Metric Smile

(well, mine are)
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Re: Dodgy brakes

Post by rich the mechanic on Mon May 21, 2012 8:56 pm

I assume that it is a 10 x 1mm thread then?
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Re: Dodgy brakes

Post by bushwhacker on Tue May 22, 2012 4:18 pm

I've been told by a Daihatsu dealer that parts are now coming in from Japan but will take about three weeks to arrive. As this is different to before I presume that it will continue in this fashion.
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Re: Dodgy brakes

Post by 8bit-ash on Tue May 22, 2012 6:14 pm

Yeah says on the website aftersales support will continue.
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Re: Dodgy brakes

Post by HighlyJetted on Tue May 22, 2012 9:33 pm

rich the mechanic wrote:I assume that it is a 10 x 1mm thread then?

Strangely I have one off my van next to my monitor, so from measuring it with my rule (!) I conclude that it is a 1mm pitch and 10mm thread.

Well as far as you can tell with a steel dictator Wink
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Re: Dodgy brakes

Post by rich the mechanic on Tue May 22, 2012 9:42 pm

Ta have you had your LSPV apart yet I'm thinking of taking it apart insitu I expect that the piston and seal is held in with a circlip but don't know.
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Re: Dodgy brakes

Post by HighlyJetted on Tue May 22, 2012 9:54 pm

Yes, stripped mine couple of weeks back.

Under the rubber there are two circlips, one half way down, the other right against a metal collar. Remove them both.

Clean the inside of the visible bore because...

You pull the exposed piston rod thus withdrawing the whole collar and piston bit.

There is an odd flat rubber seal, and an O ring - that is all that seals in there.
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Re: Dodgy brakes

Post by rich the mechanic on Tue May 22, 2012 9:57 pm

cool I hope to re seal it just to get it working as off on hols in just under two weeks.
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Re: Dodgy brakes

Post by HighlyJetted on Tue May 22, 2012 10:15 pm

Here you go, just stripped it again and took some pictures so you know what to expect....







If its leaking and not from a pipe fitting there are only 2 seals it could be. Most likely the one on the right hand end of the shaft where the rusty bit is.
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Re: Dodgy brakes

Post by rich the mechanic on Tue May 22, 2012 10:36 pm

Ta it is not far off what I thought I would find and as it has been jammed since before we bought it I suspet the rusty bit aswell hopefully a clean up and a new o ring or two and I can seal it up, any way off to bed now as have to ride to work it's only 13 miles each way.
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Re: Dodgy brakes

Post by HighlyJetted on Tue May 22, 2012 10:58 pm

If you take the far left O ring off the shaft you get fully working brakes all the time Wink

Thus it may look like a bias control valve as required by MOT, but works just like a T piece Smile
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Re: Dodgy brakes

Post by rich the mechanic on Wed May 23, 2012 8:11 pm

Thats fine by me but mine is slightly different looking as the hanger for the arm is different also I can pull the piston pin out but the arm pushes so I am confused as to how it should work.
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Re: Dodgy brakes

Post by HighlyJetted on Wed May 23, 2012 8:54 pm

Ahh, well if you get someone to push on the brake pedal you will find it pushes the piston out, and depending on how much you push back on the arm depends on the brake distribution. That's my conclusion anyway right or wrong Laughing
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Re: Dodgy brakes

Post by rich the mechanic on Wed May 23, 2012 10:40 pm







That would make sense to me as it didn't need a lot to move it I could pull it out with my fingers.

I have removed the pin and bolted a seal into the hole and blead the brakes and I seem to have brake pressure so hopefully that will do for now as it's the main seal leaking on it.
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Re: Dodgy brakes

Post by HighlyJetted on Wed May 23, 2012 10:53 pm

Well yours is very different to mine!! The valve I mean...

Your hijet is a mid 1990's 3 cylinder from memory?

My valve on Ernie the 1.3 pickup is the same as my 1999 1.3 silver MPV.

Your look like it works under the same principle to mine though.
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Re: Dodgy brakes

Post by rich the mechanic on Wed May 23, 2012 11:14 pm

Yep ours is a 1995 mpv 993cc so I assume I have the 1lt setup and all the 1.3's are like yours.

I'm hopeing that the main seal is the same as something else it looks like a ford speedo drive seal but the hole is only 5mm.
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Re: Dodgy brakes

Post by HighlyJetted on Wed May 23, 2012 11:25 pm

I'm not big up on seals and o rings etc, but I'm under the impression that seals are normally pretty standard engineering components.

They have names for ones that are square in profile and the tapered ones, and the ones which are X in profile, and they are measured by their internal diameter and the thickness, and its something to do with ISO 3601 standards.

That's the extent of my seal knowledge Embarassed

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Re: Dodgy brakes

Post by rich the mechanic on Thu May 24, 2012 9:52 pm

no such thing as a standard seal in engineering terms they are just the ones that loads of people order at work we use a few different o-rings that are common but we have several custom made Items I will be going through the suppliers catalouge to see if they make anything like what is needed.

But for the time being I don't think that the brakes have ever been as good on the jet as I used a small bolt and a rubber washer to seal off the main hole.
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Re: Dodgy brakes

Post by HighlyJetted on Thu May 24, 2012 11:15 pm

Does the pedal feel more direct and less spongy?
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Re: Dodgy brakes

Post by rich the mechanic on Mon May 28, 2012 8:29 pm

HighlyJetted wrote:Does the pedal feel more direct and less spongy?

Just a little I recon that once the van is empty I will be able to get the rear wheels clear of the ground I think I have had them skipping on standard brakes doing an emergency stop when empty.
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Re: Dodgy brakes

Post by Logi on Mon May 28, 2012 9:54 pm

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