| Author | Message | ||
     Kevin Lagden Experienced User Username: kevin Post Number: 40 Registered: 7-2009 |
Now this is interesting. I have been told that you need at least a 50 tonne press of some kind to change the rear bearings, however the very nice Mr Chapman in Melbourne, whom I visited today, says you don't and that they can be replaced easily. What is the general opinion out there, I'm intrigued and may save myself a few quid in the process. | ||
| Dariusz Brudkiewicz Yet to post message Username: darius Post Number: 1 Registered: 3-2011 |
Kevin, just few weeks ago I was replacing rear bearings in my 1948 Silver Wraith. 50 tonne press is not necessary. 15 tonne was sufficient, as I remember. It will be really interesting for me to know/see how to replace them easily. Regards Dariusz | ||
| Bill Coburn Moderator Username: bill_coburn Post Number: 1311 Registered: 4-2003 |
Well Kevin in Cherrybrook NSW and Dariusz in Poland, perhaps you may care to look at Tee One Topics issue 63 of May 2007 Pages 896 - 902 in our library http://rrtechnical.info/ As to press pressure, my experience with my Silver dawn, having the bearing pressed off the axle at the local Repco may be of interest. When the press gauge got to 15 tons, the watchers moved back some 15 feet, at 25 tons they moved to the door, at 32 tons when it moved they disappeared apparently to go home to do their laundry! With my first Shadow, the figure got to 38 tons at which point the bond was broken with a persussion that registered on the local seismology graphs. Read the article and if you like, ask further! | ||
| Dariusz Brudkiewicz New User Username: darius Post Number: 2 Registered: 3-2011 |
Bill, it seems that I had more luck because my press was 15 tonne max ! Kevin, besides the really interesting Tee One Topic mentioned above - I recommend http://www.kda132.com/Technical/SectionJ/Rearwheelbearing/rearbearings.html by Norman Geeson | ||
| David Gore Moderator Username: david_gore Post Number: 1020 Registered: 4-2003 |
Kevin, If you are working on a Silver Shadow, the press is not only needed for the bearings, a larger one is needed to remove the yoke from the half-shaft that the bearings are mounted on. Due to corrosion from road de-icing salt during DRH14434's initial life in Yorkshire, the yoke was extremely difficult to remove and eventually required 110 tonnes to break it free. An industrial 200 tonne press provided the appropriate persuasion. Remember the tightening torque to replace the yoke is 550 ft/lbs which is beyong the capacity of your standard torque wrench and I do not trust torque multipliers for this critical item. The cost of a 1000ft/lb torque wrench was over $1000 the last time I checked however salvation can usually be found at your friendly local 4WD or truck repairer as they use these large torque wrenches on a regular basis. (Message edited by david_gore on 19 August 2011) | ||
| Bill Coburn Moderator Username: bill_coburn Post Number: 1312 Registered: 4-2003 |
OK David you win! Glad I wasn't there for the push - those things give me the willies!!! And thank you for correcting my poor English; of course it is the yoke that is the problem not the bearings. Anyhow you do need a special (even though homemade) holder for the rear axle assembly to do the pressing. In short for the occasional use I would simply give the whole assembly to a machine shop with instructions from the manual and pay them to do the job. | ||
| David Gore Moderator Username: david_gore Post Number: 1021 Registered: 4-2003 |
I gave the job to a manufacturer of mining machinery that I knew from my days in the steel industry - they made up a supporting jig to hold the hub assembly amd wrapped it with wire rope to stop it spreading under the load and/or contain any shrapnel. We knew it was going to take more than 50 tonnes as a press of this capacity had previously failed to make any impression. I had resigned myself to having to source replacement hub assemblies that were not corrosion affected for overhaul and installation - the instructions were try whatever was likely to work without any responsibility for the outcome as I thought the assemblies were now scrap. The noise during the presing operation was like that when retreat coal mining with controlled roof collapse - creaks, groans and gunshots. The final separation was analogous to what one would expect from the last instant of Armageddon; an almighty crack that left our ears ringing for some time afterwards and then we had to do it again for the other housing. | ||
| Kevin Lagden Experienced User Username: kevin Post Number: 42 Registered: 7-2009 |
Dear David, I wish I could work on my car but alas simply lack the knowledge and relevant expertise to undertake such a task. Is there anywhere in Sydney that you would recommend that would do the job, rather than take it to my usual RR guy a I am trying to save a few quid here and there. Usually I would not hesitate to use the services of the RR expert but needs must in these tight economic times, plus I value my testicles as i would certainly be lacking of them both if my wife found the invoice. Also found out I need the 4 shocks done any suggestions there also. Bilstein are V expensive | ||
| Jan Forrest Prolific User Username: got_one Post Number: 226 Registered: 1-2008 |
I've never let the lack of knowledge, information, expertise or talent prevent me from working on any of my cars - including The Old Girl! However some tasks are just beyond my physical limits and/or the tools I own. Assuming that you have another car and can get the relevent assemblies off the Rolls couldn't you save yourself a lot of wedge and go that far so as to take just those bits to a nearby general engineering firm to press out the old bearings and press in the new ones? It's what I'd be inclined to do. It's similar to what I did when the Toyota punched a con rod through the block in 2 places: I had the club chairman and acknowleged Estima expert take out the engine and then replace it after I'd rebuilt it around a 'low mileage' short motor. Although the engine is nowhere near as heavy as the Rolls 6.7 litre lump, it's still quite heavy and the mid-engined position requires specialist lifting gear to lower and raise into position - which I don't own and wouldn't be economic to buy for one or two uses. What have you got to lose? At least you could stay 'intact' if SWMBO saw the total bill at the end of it. *fingers crossed* | ||
| Kevin Lagden Experienced User Username: kevin Post Number: 43 Registered: 7-2009 |
Thanks Jan for the words of encouragement. My wife uses the other RR (Range Rover) daily and I use SRH19305 on a regular basis (No garage Queen here)so a little difficult, plus lack of any tools does not help, apart from the odd spanner, Chisel,hammer and a few screws, oh and a paint brush. | ||
| Jan Forrest Prolific User Username: got_one Post Number: 229 Registered: 1-2008 |
Well this could be the excuse you've been waiting for to go out and get a half way decent set of tools. Don't forget that they need to be AF sizes rather than metric, although there's a bit of an overlap on some of the sizes. Over the years I've built up hundreds of tools, some new some used, until they all got stolen. So I slowly accumulated more and many of them got stolen! It's taken another 3 years to get back into the same position, but it's well worth it as they've already saved me over a grand last month alone. If I had to rely on profesional mechanics for everything I wouldn't be able to afford to run one car, much less the 2 I currently own and especially the third I'm committed to collecting in a month or two. | ||
| Kevin Lagden Experienced User Username: kevin Post Number: 44 Registered: 7-2009 |
As you can see from the thread I have very limited knowledge of things mechanical about these wonderful motor vehicles. In an attempt to learn more, is anyone out there in the Sydney surrounds able to assist in a few repairs and earn themselves a couple of slabs and satisfaction knowing that their experience has been passed along the line to a willing 52 yr old novice Thanks | ||
| David Gore Moderator Username: david_gore Post Number: 1023 Registered: 4-2003 |
Kevin, Are you a member of the NSW Branch of the RROCA? If not, I suggest joining and go along to the technical get-togethers that are organised on a regular basis. You will find these very interesting and informative and if you have a problem of interest, you might find you car being used to show how it is fixed. Also I suggest you download a complete set of Bill Coburn's Tee One Topics as most of the common problems have been addressed here over the years: http://rrtechnical.info/TeeOne/teeone.htm | ||
| Kevin Lagden Experienced User Username: kevin Post Number: 45 Registered: 7-2009 |
David, yes I am, but now you mention it I don't seem to remember seeing a renewal notice, which I am sure is due. thanks | ||
| Brian Crump Frequent User Username: brian_crump Post Number: 99 Registered: 2-2007 |
Kevin, you may well enjoy the technical day which is coming up on September 11. Details are in your last copy of London and Derby and will also be in the next edition coming out very shortly. Alternatively, come along to our regular breakfasts at Cucina Viscontini where you will find people happy to discuss technical issues for as long as you like. Regards, Brian Crump NSW President. | ||
| David Gore Moderator Username: david_gore Post Number: 1025 Registered: 4-2003 |
Kevin, the membership renewal notices were sent out in June and were due in July. | ||
| Kevin Lagden Experienced User Username: kevin Post Number: 46 Registered: 7-2009 |
Never received it, perhaps I can get another one please | ||
| Brian Crump Frequent User Username: brian_crump Post Number: 100 Registered: 2-2007 |
Dear Kevin, You sent me a pm asking for a renewal and I have passed that request on to our Membership Registrar who will send one out. You will receive it by mail in the next few days. Meanwhile you are welcome to come along to our events, as always. Regards, Brian Crump NSW President |
