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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Case 450B - what else could go wrong

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David in SC

04-27-2004 18:50:16




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Me again with several more opportunities. I have been noticing a bolt missing on the ripper mounting bracket where it fits around the track frame support tube? It is a 7/8" bolt. I do not keep stuff like that around so I finally got to town and picked up a grade 8 7/8x5" bolt. Went to put it in and the darned hole is stripped out. Just my luck. And I thought I would be able to cross that off my growing list. What would be the best fix? I can drill/tap up to 15/16", but I would rather just run my leads under the machine and weld it up. I can weld it so it will be easy to grind off if I need to. How in the world do you strip the threads on a 7/8" hole?
Anyway, I pulled the safety pin and tried to move the ripper; no luck. She went down but won't come back up. Must be a trick to it that I just have not figured out. I suspect this is not the original valve, looks to be something that was made to work. It is a plunger style valve mounted sticking out the top of the valve area. Has 6 ports plumbed as follows: 2 hoses going to the 2 ports on the ripper cylinder. 2 hoses going to both ports of the hydra-leveling cylinder and 2 hoses going to ports that align with the bucket tilt spool ports on the main hydraulic control valve. This does not seem right, but it has not been tampered with that I know of. I tried operating the ripper valve up and down, then while raising and lowering bucket and then while tilting bucket in both directions. No response at all. Will you all please tell me what the trick is if there is one? Or could the valve be shot?
Whew, this thing is kicking my tail. I set a target of May 15 to get it up and working and it ain't looking real good.

Thanks as always for the advice.

David in SC

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Alex

04-28-2004 09:25:42




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 Re: Case 450B - what else could go wrong in reply to David in SC, 04-27-2004 18:50:16  
David

You could always put a helicoil, not the cheapest way to go but it would be the most 'stock' way of fixing the hole.



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george md

04-27-2004 20:13:45




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 Re: Case 450B - what else could go wrong in reply to David in SC, 04-27-2004 18:50:16  
David, That sounds like a double selector valve, it gives you the option of using either the ripper or the function on the loader depending on which position the plunger is in. I set up the same thing on my 1000 case dozer , 6 way blade plus pitch control and ripper all done with a 3 spool control valve and 2 double selector valves. If the function on the loader works , the ripper should work unless the ripper cylinder piston packing is leaking very badly.

george

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