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| Iveco 7.5 Horse Lorry Brakes | |
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| Tweet Topic Started: Jun 6 2013, 04:55 AM (4,009 Views) | |
| Dillys | Jun 6 2013, 04:55 AM Post #1 |
Newbie
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Hi, I've got a 1987 horse lorry and am having a few problems. To start this particular vehicle you have to turn the ignition key and the brakes immediately start to build up pressure. You cannot actually turn the ignition key further to start the engine until the brakes are up to pressure. Problem is that I can't get the brakes up to pressure so I can't turn the ignition. Brakes have been bled via the ring clip underneath. Batteries have been fully charged and still it won't happen even with a jump start as well (I said this wouldn't work) Does anyone know a) what could be the cause of the brakes not charging up (I was told it could be due to freezing weather causing condensation) and b) How to actually start it when I have to bypass the brakes first. Many thanks for any contributions. |
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| radiotwo | Jun 8 2013, 01:09 PM Post #2 |
Member
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Hi Dillys I see no one has come back to you on this, but you might have been better putting it in the "other Iveco Vehicles " section. You also need to say which model you have which would help, but when you say you have a lorry I assume you have air brakes ! If so these won't come up to pressure till the engine is running, and have filled the tanks, but please explain more ! Also you say you have bled them with the ring clip (again if air system) all that does is let out any water in the system. Sorry I cannot help any more but poss someone else might help if the post is in the correct section. Radiotwo |
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| Spooky_b329 | Jun 8 2013, 09:39 PM Post #3 |
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Administrator
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I'm not familiar with this lorry, but it sounds strange. How is the lorry meant to build up air pressure before the engine is started? Could there be another reason the key won't turn? If it has a tilting cab I think there is sometimes a switch that prevents the engine being started if the cab isn't secured down properly. |
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| Bazil-S | Jun 8 2013, 09:58 PM Post #4 |
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Hi, Check the thin red wire that leads to the alternator on terminal "L". Usually it breaks near to alternator. |
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| Dillys | Jun 12 2013, 04:40 PM Post #5 |
Newbie
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Oh heck, I couldn't even find my own post after the mods moved it...the lorry doesn't stand a chance! I know that this lorry and its air brakes work differently to most lorries. I spent quite a long time texting folk and it was clear we were at cross purposes. The brakes do charge up first before starting the ignition - in fact as I said before you can't even turn the ignition until the brakes are fully charged. I'm presuming that this is done simply by the battery having a separate connector to the air brake system? I'll check the lead that Bazil suggests - that's not been done yet. I was told that this sometimes happens with air brakes if it has been frosty and they build up condensation inside - hence the pulley ring clip thing. All I got from it was a couple of seconds of hissing and then it stopped. I was then told that the lorry would probably need jump starting to get the ignition going and raise the pressure in the brakes - erm, yep - this is where we go back to the original issue. Anyway we tried attaching jump leads anyway to see if anything would happen (brakes pressurising or starting (haha)) and nowt did. My thoughts are that if the above is correct (in a standard lorry) then would using a compressor to build the brakes up to pressure then allow me to start it when they were ready? Confusing, ain't it..... |
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| aidan | Jun 12 2013, 09:30 PM Post #6 |
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hi Sorry but what you say about this system it no way relates to a standard system. I dont think any one can make accurate suggestions without actually seeing the vehicle and working out in what way it is not standard. It make no sense to pump the brakes up before letting the engine start, yes you could use a battery driven compressor but the power consumption to fill a truck system from flat would be very demanding and a seemingly pointless arrangement. My only thought are that this was build for a specific application, any history on the original use of the vehicle ? Aidan |
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| radiotwo | Jun 13 2013, 05:44 PM Post #7 |
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Please tell us the model and where abouts are you in the country ? |
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