John Deere 350b final drive

Bfinney5238 · Aug 9, 2023

Guys Im wanting your insight on what the problem could be. When running the dozer and pushing dirt when pulling the lever to stop the track the track stops but when I release the lever it was making a grinding noise and didnt engage the way it should. What could be the issue?

Jim.ME · Aug 10, 2023

The final drive is a mechanical gear box. It could be a bearing in the final drive; however, I would expect noise from it all the time, not just when the steering clutch is engaging. I think a steering clutch issue on that side is a possibility. When you pull back on a steering clutch lever you are disengaging the clutch disc pack (and applying the brake if pulled back more).

Do you have the service/technical manual to study how the steering works?

Bfinney5238 · Aug 10, 2023

Yeah I do Ive been looking it over. Also pulled the drive off
I havent yet tore into the drive. I thought it was gonna be
the input shaft going into the drive. But it looks good at
least the side I can see Im not sure about the other side of
the shaft going into the differential or transmission part.I
guess Ill keep messing with the drive see if I can find
something worn out in there.

sms · Aug 10, 2023

How about the throwout bearing?

sms · Aug 10, 2023

Or the pressure plate?

Bfinney5238 · Aug 10, 2023

Hmm well I took the clutches apart this evening and they are extremely wore out. Im not sure if that could be the problem. Im surprised it could move. The throw out bearing is worn for sure pilot bearing doesnt look bad.

Jim.ME · Aug 10, 2023

If they are extremely worn,to the point you are surprised it could move, I think that might be the problem, they are likely slipping and making noise until they make up after you have pulled the lever to turn.

Bfinney5238 · Aug 10, 2023

Yeah I believe that is the problem. Per the specs the
clutches and plates are both at least 10 thousands less than
the minimum specs. I believe that is the problem. The
pressure plate still looks good. Im gonna order another
throw out bearing and pilot bearing while im at it. Then put
it back together and see what happens

Jim.ME · Aug 10, 2023

You will want to get the gauge to set the pressure plate fingers, if you don't have one.

Bfinney5238 · Aug 10, 2023

Jim I believe you are the one I bought the manual and
clutches and gauge from here about a year ago. Im gonna
put them to use now! I could be wrong but I thought it was
you. Its gonna come in handy now.

Jim.ME · Aug 10, 2023

Not me.

Bfinney5238 · Aug 10, 2023

Okay sorry about that.

Another question. Will the steel and fiber discs have the
same thickness? The manual gives the specs for fiber but
the ones that are in there is steel. They look really worn but
they still have wear grooves. When I measured it I was
comparing it to fiber discs.

Jim.ME · Aug 11, 2023

I don't have the specs for the thicknesses, but do not think they are the same as the fiber discs. The steels should be smooth, no grooves.

Bfinney5238 · Aug 14, 2023

Guys will putting new clutches in the final drive push the output shaft out some? Im needing more shims now on the quill. Not sure if something is wrong or I need more shims.

Bfinney5238 · Aug 14, 2023

will putting new clutches in the final drive push the output shaft out some? Im needing more shims now on
the quill. Not sure if something is wrong or I need more shims. Ive taken it apart twice in your experience
have you ran into this problem?

Bfinney5238 · Aug 14, 2023

Here is a picture of the drive and the shims and quill

Bfinney5238 · Aug 14, 2023

Never mind that dang diagram is wrong. What a nnalert manual. That doesnt tell you to stack a clutch plate first before you install the hub. Thats a huge deal.

Jim.ME · Aug 15, 2023

I don't have a 350B technical manual, but I have a couple others similar. I believe you posted you have the manuals (I see that parts catalog page is for a 350, not a B). In the steering clutch section (not final drive) doesn't your technical manual (TM1032 for a 350B) tell something like install one composite disc against the hub then with the snap ring in place install alternating steel and composite discs when assembling?

Bfinney5238 · Aug 15, 2023

No it does not. At all. Thats what pisses me off. I figured it
out on a forum and videos. I already installed the drive but
the quill was pushed out. Ive triple checked the manual and
the parts diagrams do not show exactly how the discs line
up on the hub. It is what it is I didnt go any farther on
installing the drive so its not the end of the world but its a
pretty big problem that should have been in the side notes
or in the instructions. When Im near the manual I will take a
picture of the instructions. I didnt catch it taking the discs
apart.

Bfinney5238 · Aug 29, 2023

Well that shaft isnt coming out. I built a puller for it and a
heavy duty pipe clamp to go around the splined shaft. It
wont budge. Do you all know where I can get another
shaft? And probably a pinion and ring gear. I have a pretty
good feeling that its messed up. Shaft T20731

Pinion At18842

I havent pulled the other drive off yet. But Im going to ruin
this shaft getting it out then I will go from there.

John Deere 350b final drive

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