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doctorcorey 
Orange Level
Joined: 17 Jul 2011
Location: S. KC Missouri
Points: 570
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 Topic: cylinder ram disassembly
Posted: 01 Mar 2012 at 3:10pm |
Can these large lift rams ( HD7 HD11, etc. ) be disassembled by humans with common large tools, or do I need to pay (shudder) someone to do it. My book states torque on packing nut to be 1200 ft lb. That likely means it'll take 3000 to loosen it after 20 years of rust and other electrolysis action. this ram has a worn bushing in the head end that let's the ram shaft "wobble". Any advice on this bushing and it's replaceability? Should I look for a replacement cylinder?  Paper or plastic? Marianne or Ginger? Boxers or briefs?
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Coke-in-MN
Orange Level Access
Joined: 12 Sep 2009
Location: Afton MN
Points: 41258
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Posted: 01 Mar 2012 at 4:38pm |
You should be able to do it yourself. Might just take large wrench or tool and long pipe to get that torque. Bushing may be out there in used or even new , or can have one made. I had a bad piston on one cylinder on my 715B dipper and it was cast iron , replaced it with one made from aluminum and works fine. Cost was a lot lower than finding and machining a chunk of cast. Also it might be possible to have the piece your needing machined and sleeved to be brought back into spec. Also might get a quote from some shop to do the work of disassemble if you do have a problem.
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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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dadsdozerhd5b
Orange Level
Joined: 27 Sep 2009
Location: lansdale pa.
Points: 527
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Posted: 01 Mar 2012 at 4:57pm |
paper, maryann and briefs.  anyway, i agree with coke, do it yourself and even if you have to have a bushing made, it will be alot cheaper than having someone rebuild it. good luck with the long pipe for torque.
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HD5B, HD5G, (2) FARMALL A's, CUB. DO IT RIGHT THE FIRST TIME, IGNORE THE LAUGHTER. FLANNEL IS ALWAYS IN STYLE.
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doctorcorey
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Joined: 17 Jul 2011
Location: S. KC Missouri
Points: 570
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Posted: 01 Mar 2012 at 6:02pm |
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well I'll give it a try. There's a shop in southeast missouri that says he can match any packings. Just send it to him and it's a done deal, he says. I'll ask him about the bushing. I've got most sockets in 1" drive up to 2" diameter. Thanks for the advice. Corey
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CAL(KS)
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Joined: 18 Sep 2009
Location: Chapman, KS
Points: 3752
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Posted: 01 Mar 2012 at 9:18pm |
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you could also cut a piece of plate to fit the nut and make a wrench if you dont have something big enough. then smack with a sledge. i picked up a piece of old cutting bit from work to make the sprocket nut wrench for my hd16. the nut was 7 inches flat to flat across.. and torque is 4500-5000 ft lbs. service manual says to smack wrench with sledge hammer to break nut loose.
Edited by CAL(KS) - 01 Mar 2012 at 9:18pm
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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20
Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15
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