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350B transmission stud BROKE!

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SteveB

02-24-2002 07:33:00

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O.k I have checked things out as to why my dozer won't move. I have discoverd upon removing the floor pan , that the studs which hold the clutch housing to the trans case where messed up. One was a fresh break in the trans housing and the other was finger tight. I cranked down on the one good stud, thinking the componants might have seperated causeing the gears not to mesh???
No good. I have also adjusted the reverser linkage, still no good. Could I have snapped the drive shaft or something? The sound is comeing from where the trans and clutch housing connect.
Any insight would be great... Thanks Steve

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murray sorry did you ck this

02-25-2002 04:24:05

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Re: 350B transmission stud BROKE! in reply to SteveB, 02-24-2002 07:33:00

Ok so you need to get it fixed. I take it it has the reverser. if so did you ck the oil level as the cluches are engaged with presure. there are a lot of parts on it. if you got water in it when you washed it it may have pluged it up also. you may need to get the presures ck. on the reverser. if you have internal broken parts and have it apart. after you put it back together by all means get someone with gages that knows what they are doing or it will shift very harshley. We went through a lot of agravation untill we got it fixed right. I know that 440's broke shafts but i thought that the 350 were of beter design. good luck.

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Steve b

02-25-2002 04:03:39

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Re: 350B transmission stud BROKE! in reply to SteveB, 02-24-2002 07:33:00

Are the couplings difficcult to change? Do I need to pull the motor?

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02-25-2002 16:51:53

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Re: Re: 350B transmission stud BROKE! in reply to Steve b, 02-25-2002 04:03:39

Steve, I am not an expert. But listening to you, if it was working a bit in reverse, then maybe the coupling is not broke? I am tending to lean towards that piece that is bolted to the flywheel. Those are used on reversers. Pull the motor, and first check that out. Then if all is fine in that department, your going to have to head on back towards the coupling. If the reverser itself checks out. Sounds like those big studs worked their way out, and put the girl in a bind! I know which studs your talking about. I have mine stripped way down now. And they are big studs, with a nut on them. I am afraid if you found problems there, with your studs, you are going to have to take the rest of them off, and pull the clutch housing off, and expose the input shaft to the tranny. Thats where the coupling is. Good Luck, and keep us informed!
BZ

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gatractorman

02-25-2002 02:35:47

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Re: 350B transmission stud BROKE! in reply to SteveB, 02-24-2002 07:33:00

Hey Steve, yep I'll agree with the other guys you've blown a coupling or a shaft where reverser and tranny meets.

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Steveb

02-25-2002 03:57:51

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Re: Re: 350B transmission stud BROKE! in reply to gatractorman, 02-25-2002 02:35:47

If I did blow a coupling, would I still have reverse for a while? I had reverse, to get it back to the barn. I kept shifting forward and reverse, and then forward came back for about a minute. Then she just quit moving forward or reverse w/ that sound..... . Steve

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02-24-2002 15:31:15

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Re: 350B transmission stud BROKE! in reply to SteveB, 02-24-2002 07:33:00

Steve, I think what they are talking about is the piece that bolts to the flywheel. That could have broke.But, I am also thinking of the coupling that the shaft connects to on the input shaft of the transmision. I am not for sure, on the reversers, but I know my book shows the coupling. It may have fell off.Or broke? If you are talking about the bolts that the bell housing, and reverser bolts to the tranny? Those are studs. I also think those are 300 lbs each. Boy, I hope that didnt happen to you! I dont know why, some people cant just try and help, instead of calling other peoples things junk. I have seen every brand on this board asking for help. Good Luck! And let us, or me know how you panned out! I got my finals off! BZ

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Steveb

02-25-2002 04:47:43

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Re: Re: 350B transmission stud BROKE! in reply to BZ, 02-24-2002 15:31:15

Yes they are studs, BIG STUDS. One broke and one was finger tight.

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bob

02-24-2002 22:03:04

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Re: Re: 350B transmission stud BROKE! in reply to BZ, 02-24-2002 15:31:15

The inside of those couplings wear out til the splines no longer contact each other and the dozer sits in place while part of the shafts turn but the other shaft won't because the coupling is "bald" inside.

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murray

02-24-2002 16:25:44

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Re: Re: 350B transmission stud BROKE! in reply to BZ, 02-24-2002 15:31:15

I am trying to help i'm not just calling other peoples machines junk im being honest. our troubles started the same way. My father had a man operate the 450b for him and he never used it all that hard. but they had to carry tools with them every day to tighten up the bolts even lock tight didn't help on some especialy the bellhousing. we had the engine out 3 times for simaler things to what this sounds like. it would have been fine for a farmer who only used it part time. but not a week went by that something didn't break. we bought the Cat D3 and a few years later i took over operation of the D3 and for 6 years I abused it and it just kept on going and going.I had to wear the seat belt just to stay on. We bought a D5c last year and just sold the D3 to an older farmer so it can live out its years in a more gentle way. So I know what I'm talking about Don't through Good money at Bad. By the way dad just bought a 97 JD555G friday so i'm not just dumping on JD. This 555G is a real nice machine.

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2 murray

02-24-2002 16:59:35

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Re: Re: Re: 350B transmission stud BROKE! in reply to murray, 02-24-2002 16:25:44

murrey: Go away. The guy needs methods of fixing and not your "stories". You can't be very old yet. ralph.

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2ralphy

02-24-2002 17:29:33

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Re: Re: Re: Re: 350B transmission stud BROKE! in reply to 2 murray, 02-24-2002 16:59:35

Not very old? I've worked on our dozers for 33 years 8 diferent machines by 4 diferent brands and there was nothing i despised more than that JD. Don't blame me if his troubles never end. and I'm not the only one here to suggest he move it on.

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bob

02-24-2002 22:11:13

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Re: Re: Re: Re: Re: 350B transmission stud BROKE! in reply to 2ralphy, 02-24-2002 17:29:33

I saw a badly abused JD 450 do the same thing to a logger, and he brought it on himself. The bellhousing stud holes were drilled out & 3/4" studs put in and those broke out. Again he drilled stud holes to one inch and put in hardened Catapillar studs and those lasted the life of the dozer, which was short because of further abuse.

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jerry Gerthofer

02-24-2002 09:07:55

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Re: 350B transmission stud BROKE! in reply to SteveB, 02-24-2002 07:33:00

trade her in on a oliver crawler..... .....

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Lavoy

02-24-2002 07:43:57

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Re: 350B transmission stud BROKE! in reply to SteveB, 02-24-2002 07:33:00

Steve,
Don't have my parts book here, but if I remember correctly there is a drive disc of some sort that bolts to the flywheel, and drives the input shaft to the reverser. I think I have heard guys talk about it breaking, and then the engine won't feed power into the reverser. Maybe someone else can renember the correct name for the piece I am talking about.
Lavoy

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murray

02-24-2002 09:00:19

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Re: Re: 350B transmission stud BROKE! in reply to Lavoy, 02-24-2002 07:43:57

don't know about a 350 but we had a 450B and all this talk brings back all those horable memories of the bigest pile of junk that was ever built. we paid $15000 and in 4 years put $14000 in repairs. engine, transmision, broken bellhousing bolts, starter, injector pump the only time the repairs stoped was when we bought a CAT. and sent that heap down the road. Best bet if you plan on using it for work DON'T. just paint it and look at it.

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Steveb

02-25-2002 04:59:49

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Re: Re: Re: 350B transmission stud BROKE! in reply to murray, 02-24-2002 09:00:19

Murry, Unfortionatly sometimes what we have is what we have. I don't have the means to "just move it on" I am not a comercial contractor, I just enjoy useing my 350B for myself and friends. I also enjoy fixing things. If it's broken I will fix it. I don't care about other machines. Should have, could have, would have, doesnt fix a broken dozer, Nor do horror stories of someone elses misfortune. Good old info. and Mechanical suggestions help fix things, AS well as support from fellow enthusiests..... ..... Steve

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02-24-2002 11:32:19

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Re: Re: Re: 350B transmission stud BROKE! in reply to murray, 02-24-2002 09:00:19

Steve, it sounds like the flex plate is broke. It looks like a clutch disc. but it bolts to the flywheel. As for the 350-b &450-b, if you take care of them(keeping things tight)they are good machines. I've had a 450-b for 4 years now.All i've done to it is change the oil and replaced the alt.And yes I do work it hard.

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