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#1
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Bob is on the right track but braze don't weld. if the threads are shiny clean then you should be able to get the brass to run down at least half the thread, that will bind it all back together. You will need a heated tin of sand to bury most of the cylinder in to prevent distortion and cracking from cooling to quickly.
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Robert Pearce. |
#2
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Alex, in my opinion you have to scrap it. Just too risky. How do you explain after an accident, that you thought you had done a good job of welding it?
You only have a single circuit system. It has to be right. Sorry Alex. Just one blokes honest opinion.
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Bluebell Carrier Armoured O.P. No1 Mk3 W. T84991 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. Dodge WC55. 37mm Gun Motor Carriage M6 Jeep Mb #135668 So many questions.... |
#3
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Bad luck with the master cylinder, always a good way to ruin a productive weekend of work. For what it is worth and being a mechanic myself I was always taught and practiced that you never apply heat to brake parts or steering components as it fatigues the metal/cast and it will fail over time. My advice would be to source another component and run a tap through every thread, blow it out with compressed air prior to assembly. I even run a die nut over every stud and bolt thread.
Cheers, Dave.
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1 x 1955 Austin Champ WN1(restored) 2 x 1956 Austin Champ WN1(restored) 1 x 1955 Humber 4 x 4 GS (restored) 1 x 1945 FMC 1/4 Ton Trailer (restored) 1 x 1942 Bantam 1/4 Ton Trailer (restored) |
#4
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I agree with the other fella's Alex. Im afraid you'll have to get another one.
This is bloody frustrating and I would be very upset myself having just had it resleeved. There may be one other option. If you were to take it to a professional repairer and he was to say he can and will fix it, then I think you would be OK to proceed with a repair job - providing the professional does the work. I suppose then it is a matter of cost - if the repair is as much or nearly as much as replacement - well then, go with replacement.
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Pax Vobiscum.......may you eat three meals a day & have regular bowel movements. Last edited by Ganmain Tony; 31-07-13 at 09:36. |
#5
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I think it could be repaired. It's been sleeved so there's no danger of it leaking pressure. You'd have to use a zip disc to cut the crack wider then thread the bolt in and braze it up.
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1940 Cab 11 C8 Wireless with 1A2 box & 11 set 1940 Cab 11 C8 cab and chassis 1940 Cab 11 C15 with 2A1 & Motley mount & Lewis gun 1940 Cab 11 F15A w/ Chev rear ends 1941 Cab 12 F15A 1942-44 Cab 13 F15A x 5 1942 cab 13 F15A with 2B1 box 1943 cab 13 F15A with 2H1 box 1943 Cab 13 C8A HUP 1944 Cab 13 C15A with 2C1 box 1943 Cletrac M2 High Speed Tractor MkII Bren gun carrier chassis x 2 |
#6
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Guys,
Thanks for all your comments. It was a mix of bad luck and stupidity. I thought I had partly unscrewed the stud myself when removing the master cylinder from the truck, so I never thought that screwing it back would cause this result. An expensive lesson. On checking my pics from before removing the thing I noticed the stud was already sticking out too far, so either it came from the factory like that or it happened somewhere during it's career. Anyway, there was some black sludge in the hole....a bit mud-like. As I say....next time I will definately take the time to clean the hole and thread. I agree with all you guys.....can it be fixed?....I think so, but I would definately ask a professional shop in stead of trying myself. Is there a risk?....I think so, even though the sleeve is pretty much a closed chamber as Dave noted. The risk of it cracking again or warping during the treatment is present, so even if it can be properly welded, it could prove more expensive to get everything sorted again than to have another cylinder sleeved... Most of all, even if It was fixed properly, I wouldn't be sitting comfortably on my way to Normandy! So, the only sensible thing seems to be to cut my losses, look for another Master cylinder, or at least the casting, have it sleeved in Stainless again and do the same procedure again......well, without the cracking hopefully. thanks for the feedback guys, much appreciated! Alex
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Chevrolet C8 cab 11 FFW BSA Folding Bicycle |
#7
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Alex, it is a good lesson for us all. The gunk in the hole develops a high pressure (just like a hydraulic ram)when the stud is screwed in against it. It was probably thick enough to seal, rather than exiting down the thread.
Some guys would never say anything. We learn the fastest, when we make mistakes. When we see the mistakes of others, sometimes the warning can penetrate our own skulls. (me included)
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Bluebell Carrier Armoured O.P. No1 Mk3 W. T84991 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6. Dodge WC55. 37mm Gun Motor Carriage M6 Jeep Mb #135668 So many questions.... |
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