New guy here. I've got a 2640 that the pto shaft can be slid in about 3/4". When the shaft slides in oil leaks past the seals until the level gets below the shaft. If you pull it back out it stops leaking. Doesn't affect functionality but is frustrating when your hitched to a bush hog or something and every time you lift it it shoves the pto back and i am leaking oil like crazy. I was wandering if anyone had any experience on how to fix before I go tearing into it. I couldn't find anything similar doing google searches. Thanks in advance.
- Thread starter DeereRod
- Start date
buickanddeere
Well-known Member
The parts book is on the JD web site. The service manual is at 1-800-522-7448.
Is it a two speed pto?
There is a dedicated JD forum on this site.
Have you been faithful to change the transmission filter, clean the screen and keep the engine antifreeze corrosion inhibitor in spec ?
The JD 2640 is easy to fix a leaking rear PTO. I am assuming independent 540 PTO without reverser and front PTO. This is the most common one. If yours is different let us know. There are 4-5 different PTO options on the JD 2640 and also early an late9tiger stripped hood decals) serial number breaks too.
1) Engage the manual PTO lever at your left heal. Leave it engaged. It shifts a collar forward onto the shaft coming back from the PTO clutch. IF you leave it disengaged it will fall off the shaft and you will have to take the rockshaft housing off to reinstall it.
2) Drain all the hydraulic oil.
3) Remove the bolts out of the PTO rear quill #17. The entire housing and shaft will come out the back without dong anything else.
4) The back of the housing has a snap ring grove and snap ring # 13 that holds the bearing in the housing. Remove this snap ring. Now the PTO shaft and bearing will come out the front of the quill/housing. You may have to press it out but usually when one is moving back and forth the snap ring has come out and the housing/bearing will move out easily.
5) You can now remove the seal from the bearing housing/quill. I always apply a light coating of silicone sealer around the seal as I install it back into the housing.
6) If your rear PTO shaft bearing is fine you can just reinstall it. I usually replace it on a tractor I do not know the service history on. To remove it from the PTO shaft #11 you need to remove snap ring #12. Then the bearing is a light press fit onto the shaft.
Just reverse this and it will go back together.
Things to watch for while doing this.
A) The PTO shaft usually has worn edges on the 540 external spline. These can cut your new seal when you slide the PTO shaft back into the housing/quill. I do two things normally. The first is to take emery paper and polish the OD of the shaft and knock the edges off the 540 spline. The second is to protect the seal from the spline with thin plastic while sliding it past the seal. I have some old Micro fiche cards that work great for this. I have used several layers of waxed paper too.
B) I hope you problem is just the bearing retaining snap ring #13. This snap ring holds the shaft from moving in and out of the bearing housing/quill. I had a JD 2640 and the snap ring grove was broken off the back of the housing/quill. I ground it down flat with the bearing and installed three bolts to hold the bearing in. I had to drill and tap them just right in the housing to work.
C) I always use Loctite bearing retaining compound on the outside of the PTO shaft bearing. They can become lose and wear the housing to where the bearing is loose in the housing.
The thing to really watch on these tractors is that your PTO shafts slide easy. If you have one that slides hard it will pull out when raised with the three point. The housing/quill is quite strong in the PULL direction. Then when you lower the lift the PTO shaft is pushed back into the housing or towards the front. When this happens that one snap ring and small cast steel grove are all that holds it from moving forward. I have seen many of them broken due to hard sliding shafts.
<image src="http://forums.yesterdaystractors.com/photos/mvphoto24512.gif"/>
1) Engage the manual PTO lever at your left heal. Leave it engaged. It shifts a collar forward onto the shaft coming back from the PTO clutch. IF you leave it disengaged it will fall off the shaft and you will have to take the rockshaft housing off to reinstall it.
2) Drain all the hydraulic oil.
3) Remove the bolts out of the PTO rear quill #17. The entire housing and shaft will come out the back without dong anything else.
4) The back of the housing has a snap ring grove and snap ring # 13 that holds the bearing in the housing. Remove this snap ring. Now the PTO shaft and bearing will come out the front of the quill/housing. You may have to press it out but usually when one is moving back and forth the snap ring has come out and the housing/bearing will move out easily.
5) You can now remove the seal from the bearing housing/quill. I always apply a light coating of silicone sealer around the seal as I install it back into the housing.
6) If your rear PTO shaft bearing is fine you can just reinstall it. I usually replace it on a tractor I do not know the service history on. To remove it from the PTO shaft #11 you need to remove snap ring #12. Then the bearing is a light press fit onto the shaft.
Just reverse this and it will go back together.
Things to watch for while doing this.
A) The PTO shaft usually has worn edges on the 540 external spline. These can cut your new seal when you slide the PTO shaft back into the housing/quill. I do two things normally. The first is to take emery paper and polish the OD of the shaft and knock the edges off the 540 spline. The second is to protect the seal from the spline with thin plastic while sliding it past the seal. I have some old Micro fiche cards that work great for this. I have used several layers of waxed paper too.
B) I hope you problem is just the bearing retaining snap ring #13. This snap ring holds the shaft from moving in and out of the bearing housing/quill. I had a JD 2640 and the snap ring grove was broken off the back of the housing/quill. I ground it down flat with the bearing and installed three bolts to hold the bearing in. I had to drill and tap them just right in the housing to work.
C) I always use Loctite bearing retaining compound on the outside of the PTO shaft bearing. They can become lose and wear the housing to where the bearing is loose in the housing.
The thing to really watch on these tractors is that your PTO shafts slide easy. If you have one that slides hard it will pull out when raised with the three point. The housing/quill is quite strong in the PULL direction. Then when you lower the lift the PTO shaft is pushed back into the housing or towards the front. When this happens that one snap ring and small cast steel grove are all that holds it from moving forward. I have seen many of them broken due to hard sliding shafts.
<image src="http://forums.yesterdaystractors.com/photos/mvphoto24512.gif"/>
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
IMHO to give correct answer one needs to know type pto that your 2640 has.
The pto shaft in this parts photo was another option. Does your tractor have hyd independent(control lever between the 2 trans gearshift levers) or continuous running(dual stage clutch) pto. Also does your tractor have single or dual speed pto( 540 &/or 1000 rpm)?
The pto shaft in this parts photo was another option. Does your tractor have hyd independent(control lever between the 2 trans gearshift levers) or continuous running(dual stage clutch) pto. Also does your tractor have single or dual speed pto( 540 &/or 1000 rpm)?
It has the pto shaft between the gear shifters and it is 540 rpm(quoted from post at 13:27:32 07/17/15) IMHO to give correct answer one needs to know type pto that your 2640 has.
The pto shaft in this parts photo was another option. Does your tractor have hyd independent(control lever between the 2 trans gearshift levers) or continuous running(dual stage clutch) pto. Also does your tractor have single or dual speed pto( 540 &/or 1000 rpm)?
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
Since your tractor has 540 hyd ind pto JD Seller posted correct parts photo.
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