ekawrecker Posted February 8, 2009 Share Posted February 8, 2009 I am looking for a pair of good 4.79:1 diffs from an RAF S26 re-fueller as the ones I bought are in a poor state; if anyone knows of any NOS ones perhaps they could let me know. I take it you want 'SOMA' ones, and not 'Rockwell'? I assume they're not the same? Quote Link to comment Share on other sites More sharing options...
radiomike7 Posted February 8, 2009 Share Posted February 8, 2009 I take it you want 'SOMA' ones, and not 'Rockwell'? I assume they're not the same? Yes, they are French SOMA and totally different to Rockwell. I bought an entire rear bogie from a low mileage re-fueller but the centre diff is seized due to the actuator having been fitted incorrectly and the innards are corroded due to standing for a long period. All I have ended up with is a few spare drums, halfshafts, hubs and some monster 11 leaf springs which strangely are far heavier than the 8 leaf tractor version. Quote Link to comment Share on other sites More sharing options...
antar Posted April 24, 2009 Share Posted April 24, 2009 Slowly Andy, I have spent the last few weeks collecting parts and rectifying minor issues. I have found a pair of S26 rear axles which will let it cruise at 57mph/1600rpm rather than 42mph/1600rpm which should make a vast improvement to the economy, journey times and noise levels. For some reason the RAF vehicles were fitted with 10.00 x 20 tyres rather than the usual 11.00 x 20, but I have aquired a set of 11 new 8.25 x 22.5 tubeless wheels which will take 12R 22.5 tyres and fill the front arches better. Mike Can anybody confirm what engine and roadspeed a standard RAF 6X4 TRACTOR has please ? Quote Link to comment Share on other sites More sharing options...
radiomike7 Posted April 24, 2009 Share Posted April 24, 2009 Can anybody confirm what engine and roadspeed a standard RAF 6X4 TRACTOR has please ? The old Rolls Royce badged 305 as fitted to Crusaders and about 54mph on the limiter, but if you were going any distance it cruises nicely at 42. Standard diffs are 6.39:1 but the RAF tankers with auto transmission use a 4.79:1 while civilian ones are usually 5.64:1. I am almost sure the hub reduction is the same ratio across the range. Quote Link to comment Share on other sites More sharing options...
antar Posted April 24, 2009 Share Posted April 24, 2009 The old Rolls Royce badged 305 as fitted to Crusaders and about 54mph on the limiter, but if you were going any distance it cruises nicely at 42. Standard diffs are 6.39:1 but the RAF tankers with auto transmission use a 4.79:1 while civilian ones are usually 5.64:1. I am almost sure the hub reduction is the same ratio across the range. Thanks Mike Quote Link to comment Share on other sites More sharing options...
radiomike7 Posted April 25, 2009 Share Posted April 25, 2009 Thanks Mike Are you thinking of getting one? It would be good with a DROPS or 6x6 Perkins 350 and some better diffs. The gearbox is much stronger than Crusader. Quote Link to comment Share on other sites More sharing options...
AndyFowler Posted April 26, 2009 Author Share Posted April 26, 2009 On Ebay , I seem to recognise some of those pictures !:-D http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=220402996026&ssPageName=ADME:B:SS:GB:1123 Quote Link to comment Share on other sites More sharing options...
antar Posted April 27, 2009 Share Posted April 27, 2009 Are you thinking of getting one? It would be good with a DROPS or 6x6 Perkins 350 and some better diffs. The gearbox is much stronger than Crusader. Was thinking of it, but decided to persevere in putting my Crusader back on the road again, I have high speed diffs for it and a set of 12.00 x 20 tyres which will put it up to 62mph @ 2100rpm. Just got masses of work to do on the cab !! Quote Link to comment Share on other sites More sharing options...
Stormin Posted April 28, 2009 Share Posted April 28, 2009 Was thinking of it, but decided to persevere in putting my Crusader back on the road again, I have high speed diffs for it and a set of 12.00 x 20 tyres which will put it up to 62mph @ 2100rpm. Just got masses of work to do on the cab !! And as if by magic one cab appears on ebay.. http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=260400887621&ssPageName=ADME:B:SS:GB:1123 Quote Link to comment Share on other sites More sharing options...
antar Posted April 28, 2009 Share Posted April 28, 2009 And as if by magic one cab appears on ebay.. http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=260400887621&ssPageName=ADME:B:SS:GB:1123 Thanks Nrman, but i don,t need another cab, just time to carry out the repairs to my own, I sold a very tidy LHD cab a couple of years ago because it was in the way. John. Quote Link to comment Share on other sites More sharing options...
Swill1952xs Posted April 28, 2009 Share Posted April 28, 2009 On Ebay , I seem to recognise some of those pictures !:-D http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=220402996026&ssPageName=ADME:B:SS:GB:1123 ANDY FOWLER.......... that is pure truck porn, and I'm a very impressionable person......... how am I supposed to sleep after seeing pictures like that. I want one of those............. drool drool........ if you win the lottery ......will you buy me one............pleeeease....:-D Quote Link to comment Share on other sites More sharing options...
radiomike7 Posted April 29, 2009 Share Posted April 29, 2009 Was thinking of it, but decided to persevere in putting my Crusader back on the road again, I have high speed diffs for it and a set of 12.00 x 20 tyres which will put it up to 62mph @ 2100rpm. Just got masses of work to do on the cab !! Check the clearance of the inners on the rear springs if using an 8" rim, you may have to squeeze them over the existing 7.5" rims. S26 with 4.79:1 diffs should do 70mph @ 2100rpm.:drive::shake::stop: Quote Link to comment Share on other sites More sharing options...
AndyFowler Posted April 29, 2009 Author Share Posted April 29, 2009 ANDY FOWLER.......... that is pure truck porn, and I'm a very impressionable person......... how am I supposed to sleep after seeing pictures like that. I want one of those............. drool drool........ if you win the lottery ......will you buy me one............pleeeease....:-D Of course I will mate ! It would be my pleasure ! :-D Quote Link to comment Share on other sites More sharing options...
antar Posted May 2, 2009 Share Posted May 2, 2009 Check the clearance of the inners on the rear springs if using an 8" rim, you may have to squeeze them over the existing 7.5" rims. S26 with 4.79:1 diffs should do 70mph @ 2100rpm.:drive::shake::stop: Hope not as I have already had them sandblasted and painted, never even thought to check. looks like a trial fit is necessary today !!!will post a picture. Quote Link to comment Share on other sites More sharing options...
antar Posted May 3, 2009 Share Posted May 3, 2009 Hope not as I have already had them sandblasted and painted, never even thought to check. looks like a trial fit is necessary today !!!will post a picture. Trial fit went ok about 3/4" to spare. Quote Link to comment Share on other sites More sharing options...
AndyFowler Posted August 30, 2009 Author Share Posted August 30, 2009 One of a couple seen at Kemble MVT show today ! Saw a convoy of three soldiering on whilst on the M25 on the way to the show ! Long live Scammell ! :-D Something went wrong... Quote Link to comment Share on other sites More sharing options...
antar Posted September 2, 2009 Share Posted September 2, 2009 Engine picture for Radiomike. Quote Link to comment Share on other sites More sharing options...
AndyFowler Posted September 2, 2009 Author Share Posted September 2, 2009 Hope the baby birds had ear defenders in that nest mate ! :-D Quote Link to comment Share on other sites More sharing options...
antar Posted September 16, 2009 Share Posted September 16, 2009 Engine picture for Radiomike. Having been back and looked at it again, how does that intercooler work, It seems to have a water jacket around the inlet manifold ? surely that would warm up the inlet air not cool it ? am I losing the plot ? John. Quote Link to comment Share on other sites More sharing options...
radiomike7 Posted September 16, 2009 Share Posted September 16, 2009 Having been back and looked at it again, how does that intercooler work, It seems to have a water jacket around the inlet manifold ? surely that would warm up the inlet air not cool it ? am I losing the plot ?John. It is not usually called an intercooler but a charge cooler, even though it does the same thing. Compressing the inlet air can raise the temperature to about 150C so the cooling water at about 70C still provides a cooling effect. If you remember back to T45 Roadtrain days the Rolls and some Cummins powered ones had a CHARGECOOLED badge on the front grill. Quote Link to comment Share on other sites More sharing options...
woodchips Posted September 18, 2009 Share Posted September 18, 2009 Hello to everyone, first post after joining. Got to get the question asked, have just bought an S26 SLDT, where can I get a workshop manual for it? The hissing of air makes it immobile some times, and there is a lot of pipework to check. How many other people wasted hours getting the tipper to tip because the tipper/crane control lever is marked back to front? Bob Quote Link to comment Share on other sites More sharing options...
daz76 Posted September 18, 2009 Share Posted September 18, 2009 Hello to everyone, first post after joining. Got to get the question asked, have just bought an S26 SLDT, where can I get a workshop manual for it? The hissing of air makes it immobile some times, and there is a lot of pipework to check. How many other people wasted hours getting the tipper to tip because the tipper/crane control lever is marked back to front? Bob Hi Bob, welcome to the forum. Would love to see some photos when you have time. Try www.scammellregister.co.uk where Parry Davis is the keeper of all the manuals. You might like to introduce yourself to everyone in the relevent section of the forum. In the meantime we'll see about finding a big enough parking space for you in the Clubhouse car park. Cheers. Daz Quote Link to comment Share on other sites More sharing options...
radiomike7 Posted September 18, 2009 Share Posted September 18, 2009 Hello to everyone, first post after joining. Got to get the question asked, have just bought an S26 SLDT, where can I get a workshop manual for it? The hissing of air makes it immobile some times, and there is a lot of pipework to check. How many other people wasted hours getting the tipper to tip because the tipper/crane control lever is marked back to front? Bob Parry has a compilation of manuals that cover most of the parts on the S26 range but not the engine, gearbox, tipper or DROPS sections. The brake section is good with diagrams and part numbers . Try Walsall Brake Services at Aldridge for any air valves you need, tel 07946 574678. Quote Link to comment Share on other sites More sharing options...
woodchips Posted September 18, 2009 Share Posted September 18, 2009 Thanks for the feedback, much appreciated. Won't need a parking space though. It was bought to work in our wood, shifting tonnes of spoil to make a road. No doubt there are other ways to do it, just that this seemed so much more fun. Four trips later and I have destroyed two trees! One hooked up on the crane, the other caught under the tipping body when fully raised. I also see that none of the diff locks work. Is this a known problem? I assume they have seized after standing for years in MVS and Hampdens. Bob Quote Link to comment Share on other sites More sharing options...
woodchips Posted September 18, 2009 Share Posted September 18, 2009 Lets see if I can get the photos in. Ah, does it not take a photo off your computer, jpeg type? Bob Quote Link to comment Share on other sites More sharing options...
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