garrett41
New member
Hi guys,
I'm hoping someone where can help me diagnose an issue with my JCB 1700B.
I bought the tractor as a fixer upper a few years ago, and it's not in the best shape, leaks through most of the seals and such, but it runs and drives and digs just fine. It has a 90hp Perkins 4.236 turbo diesel and a 4-speed shuttle shift transmission.
Last year it started being a bit weaker in the forward gears. For example, it used to walk right up hills in 1st or 2nd, and with some throttle it would go up in 3 or 4. However, then it got to a point where it wouldn't go up the hills in any gear but 1, and that took a good bit of throttle.
I changed all the fluids, brakes, oil, transfer case, rear differential and transmission. The trans was a bit low and after those changes, it was working much better. It would go up the hills in 2 again, and 3 under heavy throttle.
Now a few months later, it has started making this unfriendly grinding sound when I'm going up steeper hills or pushing into a big pile of dirt to grab a bucket full. It seems to get worse the heavier I'm into the throttle and it does not happen in reverse at all. The power is still there, but it just makes the grinding noise which sounds like it's coming from right underneath the cab, slightly to the rear of the engine.
At first I thought it was the hydraulic lines cavitating or something due to the numerous low leaks, but it doesn't happen in neutral or reverse while running the hydraulics, and I can dig for hours with the backhoe and it doesn't make the noise.
Any ideas? Is my transmission going out? or maybe just the pump? or torque converter?
Any input would be great. Thanks in advance...
-Garrett
I'm hoping someone where can help me diagnose an issue with my JCB 1700B.
I bought the tractor as a fixer upper a few years ago, and it's not in the best shape, leaks through most of the seals and such, but it runs and drives and digs just fine. It has a 90hp Perkins 4.236 turbo diesel and a 4-speed shuttle shift transmission.
Last year it started being a bit weaker in the forward gears. For example, it used to walk right up hills in 1st or 2nd, and with some throttle it would go up in 3 or 4. However, then it got to a point where it wouldn't go up the hills in any gear but 1, and that took a good bit of throttle.
I changed all the fluids, brakes, oil, transfer case, rear differential and transmission. The trans was a bit low and after those changes, it was working much better. It would go up the hills in 2 again, and 3 under heavy throttle.
Now a few months later, it has started making this unfriendly grinding sound when I'm going up steeper hills or pushing into a big pile of dirt to grab a bucket full. It seems to get worse the heavier I'm into the throttle and it does not happen in reverse at all. The power is still there, but it just makes the grinding noise which sounds like it's coming from right underneath the cab, slightly to the rear of the engine.
At first I thought it was the hydraulic lines cavitating or something due to the numerous low leaks, but it doesn't happen in neutral or reverse while running the hydraulics, and I can dig for hours with the backhoe and it doesn't make the noise.
Any ideas? Is my transmission going out? or maybe just the pump? or torque converter?
Any input would be great. Thanks in advance...
-Garrett