How to fix hyd cyl weld leak

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Ok I found the leak on the stinger lift cylinder.   Won't know exactly where till I get it off the bracket and test it where i can see it.  But it's somewhere in this pic  How would you suggest I fix this.    I'm thinking grind it out then TIG weld it with multiple passes letting it cool in between.  Cylinder fully extended will put all the seals at opposite end from weld.  ..   recommended rod to use?   Prob spray crack with carb cleaner and blew out with air after grinding.  Then flush cylinder with hyd oil a few times before reassembly?Other thought it's to completely disassemble the cylinder and grind all the way through the crack.Last edited by soutthpaw; 08-06-2014 at 04:42 PM.Tiger Sales:  AHP Distributor    www.tigersalesco.comAHP200x; AHP 160ST; MM350P,  Spoolmatic 30A; Everlast PowerTig 185; Thermal Dynamics 60i plasma.  For Sale:  Cobra Mig 250 w/ Push-pull gun.  Lincoln Wirematic 250
Reply:Whats this on? Does the oil pass through the ram? A place I used to work at bought brand new cylinders for our application we would then cut off each end and put on eyes the way we wanted them. Anyway we airarced them off and welded them back on with .045L56 in spray mode. These cylinders ran at 5000psi. Never had an issue with them and seen a few of them bend the ram which was approx 3.5'' in diameter. Anyway gouging to the bottom of the crack may suffice but.... why did it break in the first place?
Reply:It's the wheel lift on my tow truck Thought about gouging out the crack with plasma tooTiger Sales:  AHP Distributor    www.tigersalesco.comAHP200x; AHP 160ST; MM350P,  Spoolmatic 30A; Everlast PowerTig 185; Thermal Dynamics 60i plasma.  For Sale:  Cobra Mig 250 w/ Push-pull gun.  Lincoln Wirematic 250
Reply:Tear it down.
Reply:Wether you tear it down or not I would question wether or not the bores are parralel to each other. I wouldn't imagine the forces there are high enough to be trying to shear it off as opposed to not pushing/pulling straight from eye to eye. Keep your heat in check but I would extend fully and have at it protect the chrome with something though.
Reply:STAY THE FUCH AWAY FROM  THE CARB CLEANER!!!!!!!!!!!Acetone the area....Take a disc grinder to the crack and groove it out about 1/8" deep and tig it with 70S-2.Do a fill pass then a weave over it and call it a day.I fix that sh!t constantly and they all do the same thing in the same place.I only fix them once....zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Originally Posted by big wormWether you tear it down or not I would question wether or not the bores are parralel to each other. I wouldn't imagine the forces there are high enough to be trying to shear it off as opposed to not pushing/pulling straight from eye to eye. Keep your heat in check but I would extend fully and have at it protect the chrome with something though.
Reply:Thanks Zapster.   I will put that to memory for the next time.  I know you do these kind of things all the time.  Was right on the joint of the weld and top of cylinderEdit: my weld worked at least. No more leak.Last edited by soutthpaw; 08-06-2014 at 07:36 PM.Tiger Sales:  AHP Distributor    www.tigersalesco.comAHP200x; AHP 160ST; MM350P,  Spoolmatic 30A; Everlast PowerTig 185; Thermal Dynamics 60i plasma.  For Sale:  Cobra Mig 250 w/ Push-pull gun.  Lincoln Wirematic 250
Reply:It takes two minutes to take the cylinder apart. Why weld on a potential hand grenade?
Reply:Looking at the first picture I thought this was the rod end. Sorry the shiny is what confused me. It makes sense now when you said you'd flush the cylinder. Anyway I'd say you got it. Tigging would probably get no contaminants into the jug also.
Reply:Originally Posted by mikecwikIt takes two minutes to take the cylinder apart. Why weld on a potential hand grenade?
Reply:It was welded on a table.Apart in 30 seconds.
Reply:Originally Posted by mikecwikIt was welded on a table.Apart in 30 seconds.
Reply:Hoses disconnected no pressure build up. Never had much luck with mig usually7014 cause I am better practiced with it than 7018.Millermatic 252millermatic 175miller 300 Thunderboltlincoln ranger 250smith torcheslots of bfh'sIf it dont fit get a bigger hammer
Reply:It was off the truck to be welded.  Actually very clean cylinder. Not like something you find on  a TLB etc.Tiger Sales:  AHP Distributor    www.tigersalesco.comAHP200x; AHP 160ST; MM350P,  Spoolmatic 30A; Everlast PowerTig 185; Thermal Dynamics 60i plasma.  For Sale:  Cobra Mig 250 w/ Push-pull gun.  Lincoln Wirematic 250
Reply:Looks good, The seals are not likely to get hurt buy any deformity there. I have never had a problem welding cylinders that were still assembled with hoses removed.   I suppose it could be a danger, but I never thought about it.
Reply:I might be completely clueless on this topic (as I is with most other stuff) but I don't think its a good idea.If one was to do it I would think a good thing to do would be to make sure the cylinder is secure because if there is a sudden pressure surge at the very least it is going to turn into a missile. I have no idea how one would figure there could be no pressure buildup with the hoses off.
Reply:Originally Posted by mikecwikI might be completely clueless on this topic (as I is with most other stuff) but I don't think its a good idea.If one was to do it I would think a good thing to do would be to make sure the cylinder is secure because if there is a sudden pressure surge at the very least it is going to turn into a missile. I have no idea how one would figure there could be no pressure buildup with the hoses off.
Reply:I think it would vent where the hoses go with hoses disconnected.  But mikecwik, this brings up a good point, the piston seals could get hot and deteriorate. Its probly a good idea to xtend the piston out and use wet rags around where the seals are. Southpaw, Reno Hydraulics in Sparks on Glendale close to the Longevity_store has the seals if you need them. There is another place not far but these guys are the best IMO.  Also, I made a torque amplifier for hydraulic seals if you need it. Its good for around 700ft/lbs but you have calcs to do to use a standard torque wrench with the amplifier. BTW Southpaw, why do you want to move to Sparks?  Most folks say they want to leave this Reno 911 S41T hole. I usually tell them to hurry and take someone with.Last edited by Insaneride; 08-07-2014 at 06:05 PM.
Reply:Originally Posted by MrLeadManWith the hoses removed there is nothing in the cylinder to cause a pressure build up of any kind.
Reply:Originally Posted by InsanerideI think it would vent where the hoses go with hoses disconnected.  But mikecwik, this brings up a good point, the piston seals could get hot and deteriorate. Its probly a good idea to xtend the piston out and use wet rags around where the seals are. Southpaw, Reno Hydraulics in Sparks on Glendale close to the Longevity_store has the seals if you need them. There is another place not far but these guys are the best IMO.  Also, I made a torque amplifier for hydraulic seals if you need it. Its good for around 700ft/lbs but you have calcs to do to use a standard torque wrench with the amplifier. BTW Southpaw, why do you want to move to Sparks?  Most folks say they want to leave this Reno 911 S41T hole. I usually tell them to hurry and take someone with.
Reply:Oh ok.  I got divorced when I moved to Reno from SoCal.   Its the effiin you get for the effin you got.BTW, that LINCOLN place I mentioned mite be dumb but dont hold that against them. I find it easier to like a dumb_azz better than a smart_azz.Last edited by Insaneride; 08-07-2014 at 06:25 PM.
Reply:Originally Posted by mikecwikI might be completely clueless on this topic (as I is with most other stuff) but I don't think its a good idea.If one was to do it I would think a good thing to do would be to make sure the cylinder is secure because if there is a sudden pressure surge at the very least it is going to turn into a missile. I have no idea how one would figure there could be no pressure buildup with the hoses off.