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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

150 international crawler -weak reverse

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adam32287

01-30-2007 16:24:44




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To go in reverse,I have to idle down,wait for it to shift,and then when it backs up,it will pop out of gear.Now,if I only use the right track,it will back up fine,but if I engage the left track,that's when it comes out of gear.It works okay in forward.The filters are okay and the tranny level is fine.Any ideas?Are parts still available for this machine?I really don't want to mess with it myself,so it's for sale if anyone is interested.I can send pics. Asking 3400.00 Thanks

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seann

01-30-2007 17:10:54




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 Re: 150 international crawler -weak reverse in reply to adam32287, 01-30-2007 16:24:44  
When you say it comes out of gear, do you mean the manual gear shifter between your legs comes out of gear? Or do you mean the powershifter lever pops into neutral? Does this machine have a 4-1 bucket? Where is it located?



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adam32287

01-30-2007 17:27:44




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 Re: 150 international crawler -weak reverse in reply to seann, 01-30-2007 17:10:54  
No,both of the levers stay in place.It just stops going in reverse unless only the right track is used.The loader is a Drott skidd loader.It is located in Beaufort,Mo. Thanks



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seann

01-30-2007 17:58:52




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 Re: 150 international crawler -weak reverse in reply to adam32287, 01-30-2007 17:27:44  
After you backup with both the right and left clutches engaged, how quickly does it "pop out" of gear? Does it always pop out of gear or only sometimes? And are you sure it's coming out of gear? Can you hear or feel gears crunching or disengaging? How do you re-engage reverse? Do you simply leave it in reverse and then pull in the left clutch lever?

And does it have a 4-1 bucket?



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adam32287

01-31-2007 06:38:19




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 Re: 150 international crawler -weak reverse in reply to seann, 01-30-2007 17:58:52  
It pops out fairly quick and every time.I don't hear any loud noises,it just stops moving.To get back in reverse,I need to idle it all the way down,then you can feel it engage and pull the left lever back,give it more gas and it will back up untill you try to put the lever back forward.I do leave it in reverse.No,it's not a 4-1 bucket. thanks again!



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seann

01-31-2007 10:10:24




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 Re: 150 international crawler -weak reverse in reply to adam32287, 01-31-2007 06:38:19  
Hmm, I dunno I think you got me stumped. Not that I'm a powershift expert though, it doesn't take much to stump me. Ordinarly I'd suspect the reverse clutch pack is losing pressure due to a bad seal. But what you describe is that it "pops out of gear" but only if the left track clutch is engaged - that doesn't sound like a bad reverse clutch seal (although it might still be weak). If the seal was bad, it would simply slip on both tracks, and probably would not have a tendency to pop out of gear (that I know of). And if the pinion or ring gear had a tooth or two missing, it would probably be making noises and it wouldn't be remedied simply by disengaging one of the steering clutches. The only thing I can remotely think of, is that it might be possible that the left final drive might have a burred tooth or two or maybe some metal floating around in it. That might be a reach, but maybe when you're backing up with power applied to that final it has a tendency to lockup or create excessive drag because of an improper gear mesh?? (due to damaged gears and/or worn bearings) And that resistance applied through the torque circuit in turn forces the reverse clutch pack to disengage (especially if transmission oil pressure is low/marginal and/or reverse clutch pack seal is marginal/weak)...disengage until you throttle down and also remove the drag caused by the left final by pulling in the left clutch lever. Because after that, you say it simply clunks right back into gear and will back out under power as long as the right clutch only is engaged?

Does the machine have an operational transmission pressure gage? If so what does it read? Does the loader have any other problems in forward or reverse? Does it push strongly otherwise? Have you looked into the left final and checked the oil? I would drain the final oil, it should only be a couple of pints (90W gear oil). Check it and see if there's any metal in it. And if you have access to a borescope look into the final and see if the gears are damaged. Try prying on the left sprocket with a pry bar (without using unreasonable force!) to see if there is excess play/movement on the left final bearing (get the weight off the final before doing this).

Try that for now, hopefully it will yield some useful info. Also you can go to the redpower link referenced below. There's an IH mechanic named rocko59 there that should have an idea of what's going on.

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