DocD
Member
I want to start my story by saying that I have had a great Dealer and John Deere warranty service, but still am having a dilemma.
My story starts with buying a new cab 3720 - 2 1/2 years ago. From the start, the loader seemed to have some cavitation when lifting (been addressed here a few times without resolve). I brought this up to the dealer and the first time to the shop - changed the oil to all season, the second time - changed the pump (was on the low side of normal for psi) and hoses, the third time had the district JD rep. look at the tractor. It definitely could be reproduced and no-one knew what was wrong or what to do. Now after 2 years and 210 hours on the tractor, it was still doing this and JD said that they would graciously replace the problem. So here I am today with a brand new 2011 3720 (not so sure I like the new loader control handle with the thumb diverter, but that if for another post) so I definitely cannot "complain" about the service.
But..... here is the problem, the new one is doing the exact same thing - only maybe a little worse. After all the work that JD has done on this for me, I hate to say anything to them, but this looks to be a factory tractor problem. I guess my question would be - is anyone else having this problem....is it a problem with the way that the dealer is setting up the tractors....is it correctable???? It really doesn't bother me that much as far as the operation of the loader or tractor, but I am concerned that if the pump is cavitating (introducing air somewhere), I would think that it MAY reduce the life of the pump. Again, the old tractor had pump and all lines replaced (or so I was told) and this did not solve the problem. It seems to happen when I go forward with the Hydro, then stop (it is not a "too much demand" problem as I am stopped and not moving when lifting the loader) and when I lift the loader - it will chadder (cavitate) as I run it for a cycle or two. After about 2-3 cycles the cavitation with stop and it will operate smoothly until I go forward or reverse again. It also happens in the 3 pt. hitch, so it is seemingly a pump problem. It happen both in the winter and summer, and seems almost to happen more once the tractor is warmed up (not seemingly a viscosity problem). I really don't notice it in the hydro performance or in the steering of the tractor - so is it really a pump problem?????
Again, I want to say that I have been extremely impressed with the dealer and JD itself, but am at a loss for what to do next and would be interested to hear some advice (always great) from this board.
Thanks,
DW
My story starts with buying a new cab 3720 - 2 1/2 years ago. From the start, the loader seemed to have some cavitation when lifting (been addressed here a few times without resolve). I brought this up to the dealer and the first time to the shop - changed the oil to all season, the second time - changed the pump (was on the low side of normal for psi) and hoses, the third time had the district JD rep. look at the tractor. It definitely could be reproduced and no-one knew what was wrong or what to do. Now after 2 years and 210 hours on the tractor, it was still doing this and JD said that they would graciously replace the problem. So here I am today with a brand new 2011 3720 (not so sure I like the new loader control handle with the thumb diverter, but that if for another post) so I definitely cannot "complain" about the service.
But..... here is the problem, the new one is doing the exact same thing - only maybe a little worse. After all the work that JD has done on this for me, I hate to say anything to them, but this looks to be a factory tractor problem. I guess my question would be - is anyone else having this problem....is it a problem with the way that the dealer is setting up the tractors....is it correctable???? It really doesn't bother me that much as far as the operation of the loader or tractor, but I am concerned that if the pump is cavitating (introducing air somewhere), I would think that it MAY reduce the life of the pump. Again, the old tractor had pump and all lines replaced (or so I was told) and this did not solve the problem. It seems to happen when I go forward with the Hydro, then stop (it is not a "too much demand" problem as I am stopped and not moving when lifting the loader) and when I lift the loader - it will chadder (cavitate) as I run it for a cycle or two. After about 2-3 cycles the cavitation with stop and it will operate smoothly until I go forward or reverse again. It also happens in the 3 pt. hitch, so it is seemingly a pump problem. It happen both in the winter and summer, and seems almost to happen more once the tractor is warmed up (not seemingly a viscosity problem). I really don't notice it in the hydro performance or in the steering of the tractor - so is it really a pump problem?????
Again, I want to say that I have been extremely impressed with the dealer and JD itself, but am at a loss for what to do next and would be interested to hear some advice (always great) from this board.
Thanks,
DW