SER1 Replacing a new front dumb iron - its done!
[prev] [thread] [next] [Date index for 2005/06/06]
From: Ulrico Becker
Subject: SER1 Replacing a new front dumb iron - its done!
Date: 19:56 on 06 Jun 2005
Subject: SER1 Replacing a new front dumb iron - its done!
Date: 19:56 on 06 Jun 2005
This is a multi-part message in MIME format. ------=_NextPart_000_0013_01C56AE2.A7B38380 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi List! just in case anybody else will have to do the same, I'd like to share the fixture made to position the new dumb iron. Two lengths of angle iron, a threaded rod, a piece of 14mm round bar, a few nuts and a few thick washers did the trick. http://groups.msn.com/TheSeriesOneGarage/ulricossi80inchproject.msnw?action= ShowPhoto <http://groups.msn.com/TheSeriesOneGarage/ulricossi80inchproject.msnw?action =ShowPhoto&PhotoID=3851> &PhotoID=3851 http://groups.msn.com/TheSeriesOneGarage/ulricossi80inchproject.msnw?action= ShowPhoto <http://groups.msn.com/TheSeriesOneGarage/ulricossi80inchproject.msnw?action =ShowPhoto&PhotoID=3850> &PhotoID=3850 The bar "A" got two holes of 14,5mm drilled at 879mm distance to each other. this is the diameter of the spring bolts. The rear bush can be used as a datum. Unfortunately I had forced it out already so a dummy had to be made and inserted. This distance of 879 is, according to the manual the distance between the two spring bolts. As both centers are at the same distance from the horizontal datum line (the line that would be created by a 4m long piece of angle iron laid on top of the chassis) the height can be adjustet by the nuts on the threaded rod. Adjusting it to 228,6mm plus the distance "a" from the centre line of the holes to the top surface of the angle iron "A", measured from the underside of angle iron "B", will place the forward hole in the correct position to simulate a spring bolt hole. Angle iron "B" simulates the datum line. The 14mm bar plays the role of the bolt and the new part can swing around it freely. The bar shown had a nominal diameter of 14 mm but came from a very obscure source... It needed to be turned on a lathe to be round. The thick washers serve to do the lateral adjustment. This is necessary because the front spring hanger is wider than the protruding bush of the rear one. Nothing of course is as easy as one is made to believe when starting something... After adjusting the new part to within 2 mm of the nominal position and grinding excess metal away so that the seams would be quite tight the measurements did not work out correctly. Compared to the existing dumb iron, the new one stood more than 5mm higher. I panicked a little bit, but decided then to measure the position of the existing dumb iron: It was nearly 10mm out of spec (237 instead of 228,6 mm). I did not find any signs of an accident so I assume this was normal fabrication tolerance.... Via the threaded rod it has been relatively easy to adjust the new one accordingly. Now both adiffer only by a couple of mm. Botha are out of spec but much closer together in their erring... I think it should work like that. Longitudinal position is within 2 mm of each other. To see the two dumb irons made me think of Oscar Wilde: "Great minds think alike..... but fools seldom differ" The life of a front dumb iron... Cheers, Ulrico ------=_NextPart_000_0013_01C56AE2.A7B38380 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Dus-ascii"> <META content=3D"MSHTML 6.00.2900.2627" name=3DGENERATOR></HEAD> <BODY> <DIV><SPAN class=3D685191613-06062005>Hi List!</SPAN></DIV> <DIV><SPAN class=3D685191613-06062005></SPAN> </DIV> <DIV><SPAN class=3D685191613-06062005>just in case anybody else will = have to do=20 the same, I'd like to share the fixture made to position the new dumb = iron. Two=20 lengths of angle iron, a threaded rod, a piece of 14mm round bar, a few = nuts and=20 a few thick washers did the trick.</SPAN></DIV> <DIV><SPAN class=3D685191613-06062005></SPAN> </DIV> <DIV><SPAN class=3D685191613-06062005><A=20 href=3D"http://groups.msn.com/TheSeriesOneGarage/ulricossi80inchproject.m= snw?action=3DShowPhoto&PhotoID=3D3851">http://groups.msn.com/TheSerie= sOneGarage/ulricossi80inchproject.msnw?action=3DShowPhoto&PhotoID=3D3= 851</A></SPAN></DIV> <DIV><SPAN class=3D685191613-06062005></SPAN> </DIV> <DIV><SPAN class=3D685191613-06062005><A=20 href=3D"http://groups.msn.com/TheSeriesOneGarage/ulricossi80inchproject.m= snw?action=3DShowPhoto&PhotoID=3D3850">http://groups.msn.com/TheSerie= sOneGarage/ulricossi80inchproject.msnw?action=3DShowPhoto&PhotoID=3D3= 850</A></SPAN></DIV> <DIV><SPAN class=3D685191613-06062005></SPAN> </DIV> <DIV><SPAN class=3D685191613-06062005>The bar "A" got two holes of = 14,5mm drilled=20 at 879mm distance to each other. this is the diameter of the spring = bolts. The=20 rear bush can be used as a datum. Unfortunately I had forced it out = already so a=20 dummy had to be made and inserted. This distance of 879 is, according to = the=20 manual the distance between the two spring bolts. As both centers are at = the=20 same distance from the horizontal datum line (the line that would be = created by=20 a 4m long piece of angle iron laid on top of the chassis) the height can = be=20 adjustet by the nuts on the threaded rod. Adjusting it to 228,6mm plus = the=20 distance "a" from the centre line of the holes to the top surface of the = angle=20 iron "A", measured from the underside of angle iron "B", will place the = forward=20 hole in the correct position to simulate a spring bolt hole. Angle iron = "B"=20 simulates the datum line.</SPAN></DIV> <DIV><SPAN class=3D685191613-06062005></SPAN> </DIV> <DIV><SPAN class=3D685191613-06062005>The 14mm bar plays the role of the = bolt and=20 the new part can swing around it freely. The bar shown had a nominal = diameter of=20 14 mm but came from a very obscure source... It needed to be turned on a = lathe=20 to be round. The thick washers serve to do the lateral adjustment. This = is=20 necessary because the front spring hanger is wider than the protruding = bush of=20 the rear one.</SPAN></DIV> <DIV><SPAN class=3D685191613-06062005></SPAN> </DIV> <DIV><SPAN class=3D685191613-06062005>Nothing of course is as easy as = one is made=20 to believe when starting something...</SPAN></DIV> <DIV><SPAN class=3D685191613-06062005></SPAN> </DIV> <DIV><SPAN class=3D685191613-06062005>After adjusting the new part to = within 2 mm=20 of the nominal position and grinding excess metal away so that the seams = would=20 be quite tight the measurements did not work out correctly. Compared to = the=20 existing dumb iron, the new one stood more than 5mm higher. I panicked a = little=20 bit, but decided then to measure the position of the existing dumb iron: = It was=20 nearly 10mm out of spec (237 instead of 228,6 mm). I did not find any = signs of=20 an accident so I assume this was normal fabrication = tolerance....</SPAN></DIV> <DIV><SPAN class=3D685191613-06062005></SPAN> </DIV> <DIV><SPAN class=3D685191613-06062005>Via the threaded rod it has been = relatively=20 easy to adjust the new one accordingly. Now both adiffer only by a = couple of mm.=20 Botha are out of spec but much closer together in their = erring... I=20 think it should work like that. Longitudinal position is within 2 mm of = each=20 other.</SPAN></DIV> <DIV><SPAN class=3D685191613-06062005></SPAN> </DIV> <DIV><SPAN class=3D685191613-06062005>To see the two dumb irons made me = think of=20 Oscar Wilde: "Great minds think=20 alike..... but fools seldom=20 differ"</SPAN></DIV> <DIV><SPAN class=3D685191613-06062005></SPAN> </DIV> <DIV><SPAN class=3D685191613-06062005>The life of a front dumb=20 iron...</SPAN></DIV> <DIV><SPAN class=3D685191613-06062005></SPAN> </DIV> <DIV><SPAN class=3D685191613-06062005>Cheers, Ulrico</SPAN></DIV> <DIV> </DIV></BODY></HTML> ------=_NextPart_000_0013_01C56AE2.A7B38380-- To change subscription see www.landrover.net/series1/mail
 |
SER1 Replacing a new front dumb iron - its done!
|
|
 |
Re: SER1 Replacing a new front dumb iron - its done!
|
|
 |
Re: SER1 Replacing a new front dumb iron - its done!
|