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Old 4 Weeks Ago   #31
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Re: My 5ino's transatlantic adventure

Could be a blockage in the hose between the reservoir and master cylinder? Or could be a number of other things. Time to get methodical and start at the beginning and work forward.
I would start by taking off the hose from the reservoir at the master cylinder. If fluid comes out the master cylinder is getting fluid if not you have a blockage. If your getting a supply I would then disconnect your front lines at the master cylinder. You can get away with loosening them a couple of turns. Pump the pedal and you should get fluid coming out of the unions. Do same for rears and just go round the circuit until you find the problem. You'll soon get to the bottom of it. It will be messy, awkward and you'll lose a bit of fluid but necessary
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Old 4 Weeks Ago   #32
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Re: My 5ino's transatlantic adventure

What I don't get is when I tried the front right, it worked, after 10-20 pumps of the pedal. But the rears are not giving any sign of fluid. I checked the unions between the brake pump and copper line that brings fluid to the rear axle and there was definitely liquid in there.
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Old 4 Weeks Ago   #33
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Re: My 5ino's transatlantic adventure

Because all the components are new they are full of air. One thing you could try is to leave one of the rear brake nipples open with a pipe attached to the nipple into an empty jar. Leave the rest of the nipples closed. It should gravity feed the fluid through the system of its own accord it may take some time though. You will also need to keep an eye on the level in the reservoir if it does start to go down.

The other alternative is in the UK they sell a one man kit called the Gunson Eezibleed. It has a bottle that attaches to the top of the reservoir and also to the spare wheel to force the fluid through the system using the spare wheel air pressure. They must sell something similar in the US?
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Old 4 Weeks Ago   #34
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Re: My 5ino's transatlantic adventure

Ok so I eventually managed. I guess there was a TON of air in the lines, because I had to start from the front right, then moved to rear right, then front left and finally rear left (this took over a minute of pumping the brakes to get any sign of life).

I went over them all 3 times to make sure all air was out. When I turned on the car I didn't really get a great brake pedal feel. I still haven't done a 40kmh brake adjustment or the reverse adjustment yet so I'm hoping that will help.

Also, I don't know whats going on, but I've noticed that when I come to a stop, the car tends to die. It turns on no problem, but it just seems every time I decelerate it sputters and turns off. I read somewhere this might be a air hose issue (the one from the airbox to the carb) and others have said it might be the carb (float or something else). I'm hoping it's something silly...
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Old 4 Weeks Ago   #35
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Re: My 5ino's transatlantic adventure

Someone else mentioned cleaning the idling jet, as it seems to be the common cause for the car dying when coming to a stop. Anyone know how to do this or have a guide?
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Old 4 Weeks Ago   #36
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Re: My 5ino's transatlantic adventure

I'm not with my car at the moment as I'm having my modern car tested. But I think the idle jet is held inside the brass screw-holder just above the mixture screw. You'll find it looking above the throttle stop screw facing the rear of the car. The screw is removed with s flat-head driver and should have a nylon washer under it. Once out, the tiny jet pulls out of the holder and can be blown out. Push it part way back into the holder and then screw that back in carefully.
All this from hazy memory and I am aware that there is some variation in carburetors.
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Old 4 Weeks Ago   #37
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Re: My 5ino's transatlantic adventure

Hi Peter,

So I found an image someone else on this forum photographed of the carb (26 IMB), this is the assembly of the idle jet:



So is it as simple as unscrewing, clean with brake cleaner/compressor and then screw it back in? There is no fine tuning necessary or adjustments?

I would like to avoid being stuck with a non working car while I wait for a replacement o-ring or something.... :S

Thanks
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Old 4 Weeks Ago   #38
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Re: My 5ino's transatlantic adventure

Quote Originally Posted by turbo500 View Post

So is it as simple as unscrewing, clean with brake cleaner/compressor and then screw it back in? There is no fine tuning necessary or adjustments?
Excellent image.

I usually hold the jet up to the light to see any obvious blockage, but it's rare to conclusively find anything. As long as you don't use anything to physically scour the jet and don't misplace the washer under the holder and don't overtighten, then you won't makethings worse.
For some reason you are not supposed to push the jet back in all the way but let the action of screwing it in to the carb make it find its level.
No further action required after that.
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Old 4 Weeks Ago   #39
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Re: My 5ino's transatlantic adventure

Thanks for the explanation. I'm guessing the jet has to be placed with the hole on the side pointing in the same direction?

Also, the screw needs to be screwed in fully yes? Not like the screws for the air/idle...


Is there anything else I could check for that is causing my 500 to turn off when coming to a stop?
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Old 4 Weeks Ago   #40
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Re: My 5ino's transatlantic adventure

Quote Originally Posted by turbo500 View Post
Thanks for the explanation. I'm guessing the jet has to be placed with the hole on the side pointing in the same direction? 1)

Also, the screw needs to be screwed in fully yes? Not like the screws for the air/idle... 2)


Is there anything else I could check for that is causing my 500 to turn off when coming to a stop?3)
1)It doesn't matter where the hole on the side is pointing, the fuel can still get into the jet and out the metered hole, there's plenty of room around the jet inside the carb.

2)Yes, screwed in fully but just nipped up, don't tighten too hard.

3)Check idle speed is not too low.
Check carb. is not flooding. Check float valve condition and float level.
There may be other reasons.....

Al.
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Old 4 Weeks Ago   #41
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Re: My 5ino's transatlantic adventure

Hi Al,

Thanks for the explanations. Regarding the carb; flooding/float level and it's condition is there a writeup or manual that shows how to do these tasks? (I'm completely a novice regarding carbs..and other things :P )

Also, I noticed there are 2 springs (rather than 1) on the accelerator cable-to-carb mechanism? Could this be somehow creating an issue? I don't know why there are 2 springs...
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Old 4 Weeks Ago   #42
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Re: My 5ino's transatlantic adventure

Quote Originally Posted by turbo500 View Post
Hi Al,

Thanks for the explanations. Regarding the carb; flooding/float level and it's condition is there a writeup or manual that shows how to do these tasks? (I'm completely a novice regarding carbs..and other things :P )

Also, I noticed there are 2 springs (rather than 1) on the accelerator cable-to-carb mechanism? Could this be somehow creating an issue? I don't know why there are 2 springs...
Most people follow the manual when checking/resetting the float level. Without pictures or diagrams, it might only confuse you trying to explain it in words. I don't have a manual but hopefully another member might put up some pics and talk you through it. I'd first check the other items mentioned though, before going near the float valve.

Afaik there should only be 1 spring on the cable to carb mechanism. Is there a bellcrank and link rod between the cable and the carb? Can you post a pic of these 2 springs?

Sorry I can't be of more help,

Al.
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Old 4 Weeks Ago   #43
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Re: My 5ino's transatlantic adventure

Youve been very helpful, I appreciate it!

I think I have the workshop manual for the Weber 26 so it's just a matter of getting to it...

Here's the dual spring accelerator! (don't know why the picture is upside down)
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Old 4 Weeks Ago   #44
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Re: My 5ino's transatlantic adventure

That's a homemade setup on the spring isn't it? I wonder if the single one wasn't strong enough to get the pedal to reset (possibly a tight/rusty cable in the sheath?) and so they just whacked another spring on to get it up.
The joys of taking over someone else's project!
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Old 4 Weeks Ago   #45
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Re: My 5ino's transatlantic adventure

There is a writeup somewhere on this forum that talks about hiw to setup and adjust a 26 and 28 imb carb.
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