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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Follow up on Internationial IH-125c trann/converte

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Paul Grothouse

11-26-2003 05:29:21

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I posted a message a few weeks ago that my 125c Internationial loader was moving slowly particulary when cold. I didn't get around to doing what everyone said until yesterday. I did as I was told in the following post Link and sure enough when I start the machine the driveshaft starts slowly and gets up to speed in about 10 seconds? Is that to slow or normal? Then when I put it in drive the shaft stops then starts turning again. So I guess it's not clutches. I opened up the bottom plate and things look pretty good, there's a little bit of fluid on some of the fittings, but not much. What should I do? Break all the fittings and retighten them? Thanks for the advice. Paul G

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Bob/Ont

11-26-2003 10:44:13

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Re: Follow up on Internationial IH-125c trann/conv in reply to Paul Grothouse, 11-26-2003 05:29:21

Paul I am not familliar with your machine but the startup speed of the drive shaft sounds good to me. Now when you say that after putting it in gear "the shaft stops and starts up again" do you mean while the machine is standing still or, starting to move as the shaft starts turning? You also said the machine works better when it warms up. I wonder it there is a screen in the suction line to the pump that needs cleaning. Just some ideas as I have never worked on your model of IHC. Later Bob

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Paul Grothouse

11-26-2003 11:21:14

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Re: Re: Follow up on Internationial IH-125c trann/ in reply to Bob/Ont, 11-26-2003 10:44:13

Dear Bob, When I put it in drive the shaft stops and then starts to pick up speed again as the loader begins to move. It is definitly not as responsive as it used to be and won't even move until warm in 3rd gear. Thanks Paul

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Bob/Ont

11-26-2003 13:04:15

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Re: Re: Re: Follow up on Internationial IH-125c tr in reply to Paul Grothouse, 11-26-2003 11:21:14

Paul, I think you haven't enough oil flow from the pump. If it works good cold and not so good when hot it's likely a worn out pump or some kind of leak. This doesn't sound like your problem. If it has to get warm to work right I think there is something restricting the oil getting to the pump. You should be hearing a buzzing sound from the pump untill it warms up if this is the case. I would be pulling off the pump suction line and looking for an obstruction or a dirty screen if there is one. This is all I can think of to help you. Later Bob

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Paul Grothouse

11-27-2003 12:39:31

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Re: Re: Re: Re: Follow up on Internationial IH-125 in reply to Bob/Ont, 11-26-2003 13:04:15

Sure enough the pump is buzzing, I never noticed it before, because I always wear ear plugs when I run the machine. The screen was cleaned about 5-10 hours ago buy my equipment mechanic and all the fittings were tightened (this problem started before he did any work). I am really at my wits end here. I guess the only thing I have left to do is pull all the hoses off and blow them out to make sure that there isn't an obstruction. One other note the fluid is full, but when I check the dipstick after running for a few minutes there are small air bubbles in the fluid. If I do have a air leak, how do I find it, everything looks good and tight?

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Bob/Ont

11-27-2003 15:02:48

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Re: Re: Re: Re: Re: Follow up on Internationial IH in reply to Paul Grothouse, 11-27-2003 12:39:31

Paul, Buzzing and Air Bubbles mean it's likely sucking air not obstructed. First thing look for any rubber hoses that might be rubbing against the pump suction pipe. Rubber hoses will cut through a steel pipe and oil not leak out because they are still pressing against the pipe. If there are no hoses touching the suction pipe then take a spray can of shaving cream and spray it on any connections in the pipe. The foam will be drawn into the pipe when the machine is running and you will find the leak. Later Bob

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Paul Grothouse

11-30-2003 14:53:46

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Re: Re: Re: Re: Re: Re: Follow up on Internationia in reply to Bob/Ont, 11-27-2003 15:02:48

Dear Bob and everyone else, I appreciate all your help, the shaving cream trick is a new one to me. I did all of the above, found no rubbed out steel lines. And gave every connection I could find a bath in shaving cream, ran the unit for 20 minutes. Nothing. The pressure gauge remains in the middle of the operating range, and there are bubbles in fluid when I pull the dipstick. The pump continues to buzz. So I have two questions: 1) Would a dirty screen act like this? I had the screen cleaned when the loader went in for a major motor overhaul about two months ago. I have no reason to disbelieve the mechanic, he is very good and very reliable. But I wonder if I should drain the tranny and check the screen again. 2) What else this be? I would think it would be a major issue to put that much air in the system. Could this be a symptom of a pump or converter failure. The factory service book does say when air is entering the system on the suction side oil should come out of the breather. I have seen none of that. Thanks again Paul

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Bob/Ont

11-30-2003 19:12:52

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Re: Re: Re: Re: Re: Re: Re: Follow up on Internati in reply to Paul Grothouse, 11-30-2003 14:53:46

Well paul you have done everything that you should do and there is still a buzzing noise. That is either Airation (air getting into the suction of the pump) or Cavitation ( restriction of the pump intake. Gear pumps usually have a hole drilled from behind the shaft seal to the suction of the pump to draw away any oil build up behind the shaft seal. If the shaft seal is hard and leaking it might be getting air from there and causing the problem. Or there may be dirt in the trans and clogging up the screen. I would replace the pump shaft seal first then check the screen. Later Bob

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Paul Grothouse

12-01-2003 07:20:42

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Re: Re: Re: Re: Re: Re: Re: Re: Follow up on Inter in reply to Bob/Ont, 11-30-2003 19:12:52

Thanks Bob. I ordered the pump rebuild kit this morning. This will take a while, I will probably wish I am contortionist taking the pump out. I'll let you know how it turns out. Paul G

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