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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

JD450 HLR TRANSMISSION PROBLEM

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Dick Poinsett

10-15-2004 09:00:52




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I have a JD455E crawler-loader. The HLR trans has a crack in the right-hand side of the case extending from just below one of the cover cap screws down 6 to 8 inches. It is not leaking at this time. Do I need to fix this right away or can I wait till it gets worse? Is it possible to repair without tearing down entire machine? Any ideas or suggestions would be greatly appreciated. Thanks.




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Roy Suomi

10-17-2004 08:14:22




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 Re: JD450 HLR TRANSMISSION PROBLEM in reply to Dick Poinsett, 10-15-2004 09:00:52  
Dick, Tom in Pa. has a point look for broken structure somewhere. They usually don't crack. Ive run into several cracked cases usually directly over the ring gear quill. If it isn't leaking profusely I would leave it alone. Just repair or replace whatever isn't structurally sound. If HLR does go bad then consider replacing the case if it gets worse. Many times dozers or loaders are used for " stumping " . This is tough on main frames, bolts ,cross bar mountings

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Dick Poinsett

10-18-2004 10:15:46




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 Re: JD450 HLR TRANSMISSION PROBLEM in reply to Roy Suomi, 10-17-2004 08:14:22  
Tom, Roy...Tks for your input. If I decide to tear it down, the shop manual says to remove from the rear of the machine which involves dropping the tracks, removing tanks etc. It seems to me that it might be easier to pull the engine and work from the front. Any thoughts?



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Tom in Pa.

10-15-2004 17:52:22




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 Re: JD450 HLR TRANSMISSION PROBLEM in reply to Dick Poinsett, 10-15-2004 09:00:52  
Usually a case cracks because of stress when a rear mounted attachment is used. The important thing is to be sure that machine side frames are not cracked, (usually where horizontal frame rail is welded to the vertical bar)And that the bolts are good, and tight.
I compare these machines to a sealed cardboard box. That is, you can probably stand or sit on the box without it's collapse. But cut the box or the tape in a few places, and the box may give out in any direction.
Anything loose will allow it to flex. The machine will need to be torn down.
Tightening everything else may buy you some time.

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