350 Clutch

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jne
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350 Clutch

Post by jne » Sat Jul 23, 2022 7:21 pm

I have a 350 in my shop that the clutch wont release according to the customer. He not real familiar with the dozer. When I got the engine out, I found theres no clutch like a tractor. Does this clutch work thru the forward reverser clutch pact as a clutch? According to the serial #, its a 1969 model. I did find his forward reverser housing needed oil, so he has a major leak, which might have caused his lose of clutch. Machine has site in shed for about a year since its run. Lots of information on this site. Thanks for any help.

B Town
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Re: 350 Clutch

Post by B Town » Sat Jul 23, 2022 7:26 pm

I recommend rebuilding the reverser. The isolator and springs in good condition? Correct no clutch, isolator.

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LeonardL
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Re: 350 Clutch

Post by LeonardL » Sun Jul 24, 2022 7:53 am

To echo what B Town has said... The machine you are working on has no engine clutch if equipped with a reverser. Your clutch action is actually an accumulator inside the valve body that controls the reverser.

So if you are working on this machine then I highly recommend you get a tech manual that matches your machine. The reversers are basically the same in all versions of the 350 but they do have updates that occurred during the series. Most of the changes were different bearings and they upped the operating pressures just a bit.

They are a bit of a beast to remove from the machine but once you get them out they aren't difficult to work on if you have some basic mechanical knowledge and have access to a good hydraulic press.

Keep us posted and if you have further questions. I've lost count of how many of these I have rebuilt over the years. Good Luck!! :D
40 plus years working on JD 350s, 400Gs, 450s and other equipment both Ag and Construction.

jne
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Re: 350 Clutch

Post by jne » Sun Jul 24, 2022 8:00 am

Thanks for the replies.

jne
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Re: 350 Clutch

Post by jne » Tue Jul 26, 2022 5:31 am

Can I remove the valve or will I have to remove the whole reverser housing to get the valve off? I hadnt been back to the machine since I made the orginal post to do any more looking, was trying to get my homework on the job done before I went back.

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Lavoy
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Re: 350 Clutch

Post by Lavoy » Tue Jul 26, 2022 7:40 am

I believe the valve is on studs, and cannot be removed while the reverser is in the crawler, but could be wrong.
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Parts and restoration for antique and late model John Deere crawlers.
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original possum
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Re: 350 Clutch

Post by original possum » Tue Jul 26, 2022 10:54 am

It may be easier to remove the side frame than the reverser if you are sure that's where you need to go.
Early 40C w/Yakima toolbar and homebuilt ripper: 350 w/6-way

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LeonardL
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Re: 350 Clutch

Post by LeonardL » Wed Jul 27, 2022 6:32 pm

Your best and in my opinion the only option is to pull the reverser. The valve will not come off while it is still in frame. Taking the frame off is just as laborious as pulling the reverser. Been there and done that and won't go there ever again. :D If you run into another issue you end up pulling the thing anyway. There are parts of the valve body that will come off but it is not an easy task and again you will most likely end up needing the entire unit out of the machine. I have looked for every conceivable shortcut I could think of and tried several. I always ended up pulling the reverser out and getting it to where I could work on it.
40 plus years working on JD 350s, 400Gs, 450s and other equipment both Ag and Construction.

jne
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Re: 350 Clutch

Post by jne » Thu Jul 28, 2022 7:39 pm

Thats what I had about decided to pull it, then I would know for sure what I needed to fix it. Thanks

jne
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Re: 350 Clutch

Post by jne » Mon Aug 15, 2022 6:56 pm

Got machine back together and found out the clutch dont work at all. When reverser is put in reverse, it chocks the engine, netural and forward, its just like clutch pedal not engaging to release clutch. Any suggestions. Thanks

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Lavoy
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Re: 350 Clutch

Post by Lavoy » Mon Aug 15, 2022 9:12 pm

Your crawler has no clutch.
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Parts and restoration for antique and late model John Deere crawlers.
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Stan Disbrow
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Re: 350 Clutch

Post by Stan Disbrow » Tue Aug 16, 2022 4:41 am

Hi,

The internals of the reverser are all screwed up is what this tells me.

Stan
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LeonardL
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Re: 350 Clutch

Post by LeonardL » Tue Aug 16, 2022 3:26 pm

Definitely has problems inside. I would say it is pull time. Take it all apart to see what the issue is and go from there.
40 plus years working on JD 350s, 400Gs, 450s and other equipment both Ag and Construction.

jne
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Re: 350 Clutch

Post by jne » Tue Aug 16, 2022 7:15 pm

Talked to my customer this evening and we had decided reverser had to come out. Customer didnt know much about the machine and it was not running when they brought it to my shop. Thanks again for the information on this site, all the older mec
hanics who knew about these machines are no longer around here to talk to.

jne
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Re: 350 Clutch

Post by jne » Fri Feb 03, 2023 8:33 pm

We finally got the 350 back in the shop, pulled the engine and transmission. Found the bearing inside the front assembly came apart. The main shaft thru the clutch packs was cracked behind the allen head screw on the from and broke off while we were taking it apart. Didnt find anything else that appeared messed up or broke. Clutches all look OK which the spacers have been warm and colored. The center tube (3 tubes that hold the housing in the case) with the spacer also broke when we took it apart. Serial # is T4F3D 096852T. I not sure if its the orginal transmission or has been changed. Everthing looks the same as a 350B with the reverser. Customer kind of wanting a complete rebuilt transmission. Any suggestions where we might find one ?

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