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D6c transmission magnet metal found

M

Milk

Member
Hello everyone,
Maybe someone on this forum can help me.I found metal in the transmission magnetic filter under the seat on my d6c caterpillar, serial # 10k10536, 1974 year. It doesn't make any kind of noises, just is a concern of mine.Any ideas where it can be coming from, or should I be overly concerned about this?THANKS in advance for any suggestions!
 
If the Magnets are fuzzy with all the chips the same size, that's nothing to worry about, unless there's a lot. If the pieces are all different sizes, it may be thrust washers and needle bearings from the planet carrier. Transmission operation will be normal and noiseless right up to the time the trans locks up. Clean out a spot in the garage and pull the transmission. NOTE: These are the symptoms of a POWER SHIFT, not a manual trans.
 
It is a power shift transmission. The pieces are different sizes.Will it go for a while longer?I have a week worth of work to do yet.
 
I should mention that the oil in the magnetic strainer is drawn from the bevel gear housing, and close examination of the pieces may tell you whether or not to lift the bevel gear cover first.
 
There is simply no way to predict that. You have to take into consideration what peripheral damage will occur if you run it till it quits. Then, you will have to have another machine to drag it out of the mud and push it onto the carry-all. If you have a week's work for a D-6, can't you rent something to finish this job off? When I found odd pieces in my strainer, I was in a similar situation as you. I tried to run it, didn't even go 8hrs. Did you save the oil? Send in a sample, they might be able to tell you where the metal came from. Right now you can drive it to the repair area and have only a couple hundred in parts. If you try to push it and take out the planet carrier, or the bevel gears, or push something through the transmission housing... You're just going to have to weigh the risks, and decide if you want to take the chance.
 
If oil from transmission,bevel gear case and stering cluch is the same it should be some
small pieces from brake band lining
 
Yes,that makes me think!Could the metal possibly be coming from a failing hydraulic pump?Like I said, there seems to be no indication of a failure anywhere.
 
The trans pump could be failing, but I would think the trans pressure would be down. Does it drop right into gear when cold? I also tend to believe the pump would grind itself into dust rather than make large pieces. Just for laughs, cut the ends off the trans filter and stretch the pleats out to see what's in there
 
If there are metal fragments in pleats of the transmission filter, would that tell, more than likely, the source of the fragments?THANKS for the response..
 
I want to consult my shop manual before I give you any more information... been having sewer problems last 2 days, will do some studying tomorrow. If you are interested in doing a oil sample, send me a email and I'll send you a couple jars. All you do is drop them at the post office and Cat will send the findings to you.
 
I think that I would like to do that. What kind of sample?Can I scrape some of the iron particles off of the magnetic filter?Would that point me in the right direction of where to look for the source?Or a sample of the oil form the transmission?THANKS
 
Naturally, the best sample would be after its all stirred up. If you didn't drain anything, put the top back on the strainer and warm up the tractor. If you already drained the bevel gear housing and discarded the oil, drain some out of the converter (only need about 6 ounces) as this is part of the transmission circuit. The test kit comes with the bottle, shipping tube, mailing label and a sticker to put on the bottle, which you fill out, stating the model of the machine, S/N, hours on oil etc. The service is already paid for, including shipping, all you have to do is mail them. I've never done this before, but put the pieces you found in the strainer in a sandwich bag with a note saying where you found them. Don't mix them with the oil!!! Just stuff it in the mailing tube with the bottle. They will send you paperwork with a complete list of all the metals found in the oil. Then they will make a recommendation: Change the oil and re-sample, or do not run the machine. Email is open, soon as I get an address I'll get them on the way.
 
Just curious as to what was the problem with your transmission?You mentioned that you had a similar problem with your machine. Maybe I can narrow down where to look for the source. Thanks for the information.
 
Can you post a picture of what you got on the plug,like was suggested cut the filter open and see what you find,I'm in the repair business a long time and can safely say I never see a Cat drain plug without some metal on it,after all that's what those plugs are for.
AJ
 
Thanks for the response. The transmission
magnetic filter located on the top of the
transmission, the metal strainer has bits
and pieces of metal on it.The machine is
not home right now but when I get it home I
definitely will post some pictures. Like I
said earlier, the machine operates fine, no
strange noises coming from the transmission
,just a concern of mine.
 
Bits and pieces are call for concern,anything more than filing dust mean some part has broken up,post a picture and one of us might know where it came from.
AJ
 
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