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Post by ronnie on Aug 16, 2010 15:14:27 GMT 2
Hi Marius
Just to keep you happy I have replaced the short bolt holding the doughnut. I had 4 in stock 3 too short 1 too long, which I have cut to suit ;D
Ronnie
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Post by ronnie on Aug 16, 2010 15:25:23 GMT 2
Hi Spikes Thank goodness all that info was not for me to read I feel better now Ronnie
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Post by marius on Aug 16, 2010 16:00:21 GMT 2
Good job Comrade
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Post by Ari Bezuidenhout on Aug 16, 2010 17:33:31 GMT 2
Hi Ronnie
Has the vibrations improved now that you have replaced that bolt.
Ari
PS When you going to send the son-in-law to get the aircon??, I'll throw in a free locsa sticker
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Post by ronnie on Aug 16, 2010 18:16:35 GMT 2
Hi Ari
Replacing the bolt has made no difference. I need to get a new seal for the gearbox as the rear seal is leaking. When I get that I will spend some time to see if I can see anything when it is stripped. I will phone Gavin tomorrow and remind him. When does the university close for the year?
Ronnie
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Post by danie on Aug 16, 2010 18:27:07 GMT 2
Hi Ronnie Hi Danie I don`t think it is a good idea to manufacture a polyurethane doughnut as you will not have the locating pins, 3 on each side of the doughnut to ensure it is centred. I think you will end up with more problems than you had before. ( and you will have spent money for nothing). Just my thoughts. Ronnie I don't think the locating pins will be needed on the Polyurethane Doughnut at all - If the Inside Diameter (ID) of the Polyurethane bush is 45 mm (exactly the same as the Outside Diameter (OD) of the "tubing" which holds the rubber Pilot Bush, the "tubing" will actually centralize the Polyurethane Doughnut. This would also mean that there would be no need for the pilot Rubber bush in future...... Regards Danie I
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Post by marius on Aug 16, 2010 18:29:58 GMT 2
Hi Ronnie At least now you can tighten the nut properly By the way - the leak - could have been from overfilling if you did in fact overfill??? I overfilled with 2 liters and some oil came through the boot on the gear leaver. I reduced it to about 1.7 liters and will have a look soon. Regards Marius
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Post by ronnie on Aug 16, 2010 20:46:10 GMT 2
Hi Marius
yes I did overfill, but it has been fine up to now.
Ronnie
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Post by ronnie on Aug 17, 2010 9:22:22 GMT 2
Hi Danie
I was trying to have a good look at the doughnut this morning and I don`t think the centering bush in anyway centres the doughnut. As far as I can see the only thing which centres the doughnut on the two flanges is the 6 locating pegs. The locating bush seems to be on the shaft only. I could be wrong but I ain`t taking it out just now to look closely. ;D
Ronnie
PS I have just read your post again and see what you mean, however I still think it is preferable to have the locating pins holding the doughnut firmly in place.
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Ventzel
Senior Niva Petrol Head
Posts: 412
Registered: Aug 3, 2010 22:30:24 GMT 2
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Post by Ventzel on Aug 17, 2010 9:45:50 GMT 2
Hi - first test to reply. Checking sending/receiving mail to the forum. Rgds Ventz
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Post by marius on Aug 17, 2010 11:35:01 GMT 2
Welcome back Ventz >>I don`t think the centering bush in anyway centres the doughnut.<< I agree on that one too ;D
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Post by ronnie on Aug 17, 2010 15:01:55 GMT 2
Hi Marius and Danie
What Danie is suggesting with the doughnut will probably centre it on one side but the other side will not be centred without the "pegs" on the doughnut.
Ronnie
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Post by danie on Aug 17, 2010 19:58:42 GMT 2
Hi Ronnie
I assume the distance between the center of the Gearbox Output flange towards the three holes (on the "legs" of the Flange are exactly the same.
I stand to be corrected - but if the holes on the Polyurethane Doughnut are an exact match (to the Output Flange), and the distance from the center point (of the Polyurethane Dougnut) towards all six holes are exactly the same, the three bolts which connect the Doughnut to the Flange will automatically centralize the Doughnut on the other side.
Regards
Danie
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Post by ronnie on Aug 18, 2010 9:29:20 GMT 2
Hi Danie Yes the holes are the same. Remember THEY say the Granada doughnut is no good as it does not have the locating pegs. The problem with this mod is you will need to spend a considerable amount of money just to try it out . If you want to really go hard with the coupling why don`t you machine a thick piece of aluminum instead of polyurethane. You should not have locating problems as it is not affected by centrifugal forces as it spins and if you have access to a lathe you can do it yourself. Ronnie PS I have problems here with signal and end up with the message "cannot display the web page". Is there any way to save the message before sending so it is not lost?. Thanks
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Post by Ari Bezuidenhout on Aug 18, 2010 9:47:15 GMT 2
Hi Ronnie
The only way I can think of is to type your messages into microsoft word and then to copy and paste them into the reply box.
Ari
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dgc
Full Niva Petrol Head
Posts: 198
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Post by dgc on Aug 18, 2010 13:28:42 GMT 2
Hello gentlemen, I've made some good progress on solving the vibration issue on my Niva. In view of the fact that there is zero vibration on the gearbox I decided to start my search where the gearbox ends. I removed the TC and intermediate shaft. I stripped the intermediate shaft so that I had 4 seperate parts (gearbox flange, doughnut, center flange and CV). Checked to see if there is any excessive play or wear on any of these parts and all seemed okay. If you want to really go hard with the coupling why don`t you machine a thick piece of aluminum instead of polyurethane. You should not have locating problems as it is not affected by centrifugal forces as it spins and if you have access to a lathe you can do it yourself. Similar to this, I machined 3 spacers. 45mm is length, 30mm diam and 12mm hole through it. I refitted the gearbox flange then I turned the centre flange so that the holes lined up with the gearbox flange and fitted the spacers. So I had a gearbox flange, 3 spacers and 3 bolts and a centre flange bolted to the gearbox (No CV). I started motor up, popped it in 1st gear and let the intermediate shaft turn. I found that the shaft onto which the CV fits, wasn't running true. It was about 2mm out. I fitted the CV and the TC. Started the motor up, ran in 1st and saw that the TC was moving about 2mm - due to the shaft that wasn't running true. I've stripped everything again and sent the 2 flanges in to have the faces machined so that they run 100% true. I'm hoping to get everything back by tomorrow. Then I'll reassemble everything again (spacers instead of doughnut) and see if the splined shaft runs true. If it's sorted I'll strip everything and send the gearbox flange, doughnut, centre flange and CV together for balancing. I have a pic of the assembled intermediate shaft with spacers but can't upload pics. I'll send it to someone to post for me if possible. Also, whilst I'm busy I'd like to replace the gearbox and TC shaft seals. I have seen the part numbers for these seals somewhere on the forum before but I can't find them now. Please help me if you know what the part numbers are. Thanks! Danie, sorry for hi-jacking your thread.
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Post by ronnie on Aug 18, 2010 13:44:20 GMT 2
Hi Ari
Thnks I will ask Freda to show me how
Ronnie
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Post by marius on Aug 18, 2010 15:21:41 GMT 2
Hi Douw - it sounds promising!
Ronnie it is even quicker do it in Notepad.
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Post by ronnie on Aug 18, 2010 16:48:53 GMT 2
Hi Marius My notepad uses a pencil or pen how does that help Ronnie
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Post by Ari Bezuidenhout on Aug 18, 2010 16:58:37 GMT 2
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Post by Ari Bezuidenhout on Aug 18, 2010 17:11:02 GMT 2
Hi Ronnie
1 Click on start at the bottom of your screen. 2 A menu will appear and look for one that says "programs" 3 If you hold the mouse cursor over it another menu will appear to the right of it. 4 look near the top of this menu for "Accessories" 5 hold the cursor over it and a third menu will appear to the right again and in the about middle it will say "Notepad". 6 Click on "notepad and a box will open that you can type in. 7 type your message. 8 When finished take the mouse cursor and holding the left button in, move the mouse so the cursor to the opposite corner and the text should have a grey background. 9 right click on the grey area and choose "copy"
10 go to your locsa message box and right click and choose "paste"
Ari
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Post by marius on Aug 18, 2010 18:02:30 GMT 2
Thanks Ari Ronnie now you can chuck your notepad and pencil ;D ;D ;D ;D ;D AND Ronnie if you want to save something in Notepad format just make sure you save it with the extension .txt Sample - RonnieChuckedHisNotepad&Pencil.txt ;D ;D ;D
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Post by danie on Aug 18, 2010 18:53:28 GMT 2
Hi Douw Your report really sounds good. It would also be very interesting to get a full report from the guys who did the machining. Pics would be very interesting - you could just have a look at some advice regarding the upload of "nice big pics" at this Thread: locsa.proboards.com/index.cgi?board=general&action=display&thread=39If you do need more advice, just let us know. Regards Danie
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Post by ronnie on Aug 18, 2010 19:14:55 GMT 2
Hi Ari
Thanks for the instructions. When I have a couple of spare hours I will try it. Gavin says he will try his best for next week he will phone
Ronnie
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spikes
Moderator
Posts: 3,689
Location: Mpumalanga
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Post by spikes on Aug 18, 2010 19:16:56 GMT 2
Hi Douw, promising progress! Patent your mod and sell it to the USA so that Russia can steal the information back ;D This is really good news Regards all Spikes
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Post by Ari Bezuidenhout on Aug 18, 2010 19:21:01 GMT 2
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Post by danie on Aug 23, 2010 20:31:24 GMT 2
Hi All
As mentioned under the "Supercharger" thread - the firm which did the Supercharger installation has manufactured and installed a Teflon Dougnut as well.
The Lada has done more than 5000 kms since installation of the Doughnut - and according to the owner there is a huge improvement as far as vibrations are concerned.
The owner had to buy the Teflon himself, (unfortunately I did not ask about price) and the machining cost was R300.00.
As mentioned under another Thread - I decided to put the Polyurethane idea on hold, due to a possible heat problem. While Teflon will be far more heat resistant - I think that's the way to go.......
Regards
Danie
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Post by danie on Aug 23, 2010 21:31:45 GMT 2
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Post by danie on Aug 24, 2010 17:39:59 GMT 2
Hi All
Today I visited the firm to discuss the Doughnut in more detail - but soon realized that there has been some misunderstanding :
They only replaced the rubber Pilot Bush (inside the Transfer Box Input Flange) with a Teflon Bush - and they have not replaced the original rubber Doughnut. While I was referring to the Doughnut yesterday, they were actually talking about the Pilot Bush........
Anyway, today I have ordered Teflon to machine a Pilot Bush - and I have decided to stick to a rubber doughnut for the time being.
Danie
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Post by ronnie on Aug 24, 2010 18:22:57 GMT 2
Hi Danie I am interested in the results from Douw`s experiment. Hopefully we will hear soon. I would not do to much until we hear from him. Ronnie
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