440 late model icd final drive

440icd · Post by **440icd** » Mon Jul 18, 2005 10:13 am

Hello Lavoy.

took the right side final drive off yesterday.
there was no power to that track.
haven't got to look it over to much yet, But I do notice, lots and lots of oil.
All over everything.
could this be the power issue to that side?
Do I need to take the center case apart???? ring gear, pinion??????
Also do I have to take both final drives off to check out the ring gear ad all that stuff? it looks like its in the transmission housing.???????
how do I get to that stuf??????
thanks much
Scott in wa.

Jimmy in NC · Post by **Jimmy in NC** » Mon Jul 18, 2005 4:27 pm

Scott~

You should be able to view the ring gear by going through the rear cover. Should be 10 bolts. This will be the cover that holds the PTO if your crawler is so equiped. Mine has just a flat piece of steel someone made for it so it's super easy. Anyways, just pull that cover and the whole carrier and ring and pinion will be there. Not sure what it will take if you have a 3 pt and a pto since I don't have either.

The oil on the clutch will deffinately cause the power loss though.

Jimmy

Jimmy in NC · Post by **Jimmy in NC** » Mon Jul 18, 2005 4:28 pm

Scott~

Just realized you have the 440icd.. which I'm sure is different than my 420.. how different I don't know. Hope it helps though.

Jimmy

Post by **Lavoy** » Mon Jul 18, 2005 4:51 pm

If the steering clutches get oil on them, they will slip yes. Most commom culprit is the pinion shaft seal, although the seal from the rear end will leak as well.
You can pull the rear cover like Jimmy said to look at the ring and pinion.
Lavoy

440icd · Post by **440icd** » Mon Jul 18, 2005 6:17 pm

Ok,
There are a couple rear covers on the back of the tractor.
Are those it? I think they are round.
How do I take these gears out and also replace the seals in the tractor side? not the final drive side.
Do I have to take the trani off and apart to do this?

I only have one final drive off right now.

And will the oil make it completely stop as far as the trac turning?
thanks for the help.
Scott

Post by **Lavoy** » Tue Jul 19, 2005 9:28 am

Only way to replace ring and pinion is complete disassembly of the crawler until the only thing left is the transmission.
Lavoy

JD dozer mike · Post by **JD dozer mike** » Tue Jul 19, 2005 2:16 pm

to replace the ring gear shaft seals , i think you can remove the final drive throw out bearing thrust plate, like 4 7/8' bolts and get to the seals that way.
Also check bull gear and shaft splines, did brake on that side work?

440icd · Post by **440icd** » Tue Jul 19, 2005 2:39 pm

Nope,
Have to have get my brakes re-lined.
I will be looking it over this weekend.
so what your saying is I might be able to do that through the final drive housing??
thanks
scott

JD dozer mike · Post by **JD dozer mike** » Wed Jul 20, 2005 2:09 pm

yeah i think you can change the ring gear shaft seal without dissasembling the entire rear end, also be sure to change tour pinion shaft seal , as it is isually the culprit.

Just looking at the parts book shows a seal behind the "Quill" it is a round plate behind the steering throw out bearing. book shows it coming off and a bearing and seal behind it.want a scan copy of breakdown pic?

seems like it would be a REALLY stupid design flaw to have to dissassemble and entire machine to replace seals.

Post by **Lavoy** » Wed Jul 20, 2005 3:32 pm

I should have qualified my answer further. Yes you can replace the carrier seals by taking the final drives off, no you can not replace the ring and pinion itself without total disassembly.
Lavoy

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440 late model icd final drive

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