Hi I m new to this forum, thanks for letting me join. I have a John Deere 4620, and need to replace the rear pto seal. My problem is getting the pto quill out of the tractor. I got the six bolts off holding the rear bearing cover off, the assembly will only pull out about half an inch. Is there something I m missing? By the manual diagram it looks like it should pull out, the shaft and a gear. Any help would be appreciated. Thanks Rob.
- Thread starter Reprob
- Start date
caterpillar guy
Well-known Member
I can't help you with your removal problem. If you look down further there s a Deere board that has a lot of knowledgable guys there that can help you with how to get that apart to fix.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
Welcome to this forum
It appears from viewing 4620m parts catalog that rear pto bearing will have to slide off pto shaft in order to R&R seal. A snap ring(item 7) on opposite side of a pto driveshaft gear will keep shaft from being pulled out rear of tractor.
(quoted from post at 04:56:24 09/30/23)
Welcome to this forum
It appears from viewing 4620m parts catalog that rear pto bearing will have to slide off pto shaft in order to R&R seal. A snap ring(item 7) on opposite side of a pto driveshaft gear will keep shaft from being pulled out rear of tractor.
That s kind of what I was thinking, but it looks like it retains the inner part of the roller bearing and should slide out of the outer part of the bearing. How would you remove it from inside the tractor with out a total over haul. Working on a few JD tractors one would think it would be easier than that.
(quoted from post at 04:56:24 09/30/23)
Welcome to this forum
It appears from viewing 4620m parts catalog that rear pto bearing will have to slide off pto shaft in order to R&R seal. A snap ring(item 7) on opposite side of a pto driveshaft gear will keep shaft from being pulled out rear of tractor.
That s kind of what I was thinking, but it looks like it retains the inner part of the roller bearing and should slide out of the outer part of the bearing. How would you remove it from inside the tractor with out a total over haul. Working on a few JD tractors one would think it would be easier than that.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
I agree snap will hold inner brg race in place on shaft & will also hold gear(item 11) in place which will limit how far rearward pto drive shaft can be moved
I would think the whole shaft with the gear would pull out as on assembly, how do you get to it to remove it and then reassemble it without taking the whole tractor apart. I don t see any access covers to get to it. Most JDs the shaft pulls straight out. Something is hanging it up but I can t see it.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
I have ZERO experience with a 4620 but as I previously stated I'm guessing pto driven gear(item 11) is blocking shaft from moving very far rearward. You need to get a tech manual #1030.
(quoted from post at 08:32:25 09/30/23)
I have ZERO experience with a 4620 but as I previously stated I'm guessing pto driven gear(item 11) is blocking shaft from moving very far rearward. You need to get a tech manual #1030.
I have the manual, could not find the removal procedure for the pto shaft. Only the bearing removal and replacement. I got the part lay out but that doesn t help.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
My suggestion is put a jaw puller on end of rear pto shaft & pull housing with seal from pto shaft. Hopefully brg will slide out of housing
This post was edited by Tx Jim on 09/30/2023 at 09:04 am.
This post was edited by Tx Jim on 09/30/2023 at 09:04 am.
wore out
Well-known Member
That was my thought, as well, until I looked closer. Snap ring (7) holds bearing on shaft and snap ring (15) holds bearing into housing.
Something's gonna BREAK is a puller is applied.
Sure wouldn't think one would need to split the tractor to free up the front of the shaft so it and the rear quill can be withdrawn and the snap ring (15) can be accessed, but perhaps that's the way it is???
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
OOPS I didn't take into consideration about the function of the larger snap-ring. Thanks for correction, Jim
I had to fo the same thing on a 4520 powershift.
You have to remove front pto quill cover and remove snap ring, then rear shaft will pull easily. Most 4620 do not have the front pto,but they still have the cover to remove the snap ring.
Same as when you split the tractor behind clutch housing.
You have to remove front pto quill cover and remove snap ring, then rear shaft will pull easily. Most 4620 do not have the front pto,but they still have the cover to remove the snap ring.
Same as when you split the tractor behind clutch housing.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
Cover ftd860 mentioned would be located under center of clutch housing. LH rear axle wouldn't require removal to access snap ring.
Cover with 4 bolts under the engine oil pan, behind the clutch, and in line with the pto shaft.
The 1/2 inch motion you have is because the front bearing is a cylindrical roller bearing with removable inner race: The inner race can move axially relative to the bearing, but will not fit trough the spline gear. That is why you have to remove the front snap ring and the bearing inner race.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
I'll guess 1000 rpm shaft on 4620 is around 3 feet long
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