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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

How difficult is JD450C hydraulic cylinder repair

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RussT

01-17-2006 06:43:27




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I have a JD 450C with a leak on the front of one of the blade angle cylinders. I've been trying to get a local mechanic to come out and fix it but he keeps saying he's busy. So far I could have paid two mechanics for what it's cost me in lost hydraulic fluid. I've already bought the repair kit from John deere and I have a manual on the crawler even though I don't recall if it addresses cylinder repair. Just how hard is it to repair this leak? Is it something I can easily do myself. Any advice is greatly appreciated. Thanks

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RussT

01-18-2006 06:17:11




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 Re: How difficult is JD450C hydraulic cylinder rep in reply to RussT, 01-17-2006 06:43:27  
Thanks Roy. That sounds simple enough. I'll give it a shot.



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Roy Suomi

01-17-2006 20:41:21




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 Re: How difficult is JD450C hydraulic cylinder rep in reply to RussT, 01-17-2006 06:43:27  
Piece of cake....Remove the cylinder . Put it in a big vise. There is a thin nut around the gland of the cylinder. This nut has a couple of notches on the O.D. .. Tap it loose with a punch and unthread it all the way, slide it down the chrome rod. With a brass punch tap the gland into the cylinder barrel till it clears the retaining ring in the internal groove. Pop the retaining ring out of the groove. With the cylinder barrel still in the vise, put a large piece of bar into the cylinder eyelet. Tap on the bar so the rod starts to come out of the barrel...WATCH OUT for oil , the cylinder will puke all over your shoes.Remove the rod assembly. Watch how the packings come off the piston and gland nut, so you can reassemble it the same way.Clean the groove where the snapring goes into barrel. Goes back together in reverse procedure.Make sure you tighten the packing nut on the end of chrome rod to specs....Grease packings and tap it back into barrel. Grease o-rings on gland nut . Tap gland nut back into cylinder barrel to just past snapring groove. Install snapring. Tap the bar in the end of cylinder so it pulls the glandnut to the snapring. Install thin nut onto glandnut. Give her a little tap with punch and hammer to tighten thin nut..... .You got'er

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