Jd450 straight oil in bell housing. How to find it

[georgia088]

I am getting a lot of oil in bell housing. Like a gallon an hour. I have pulled engine and everything is soaked I. Hydraulic fluid. It is not motor oil from the rear main seal. I connected a large drill to an old clutch and turned the input shaft. Thinking this would build pressure and show where my leak is coming from, but I it is not building up any pressure. I’m guessing the drill is spinning the input shaft 600-700 rpm. I would think it would have to build pressure if I am spinning the input shaft wouldn’t it?

It was working before I pulled the engine, but the clutch was slipping from the oil. Any ideas why it wouldn’t build pressure doing this?

Thanks!

[Jim B]

Facing the shaft which way is your drill turning the shaft?

[georgia088]

Clockwise. I actually tried it both ways, but I spun the starter over and it appears the engine spins the input shaft clockwise. So I have the drill in forward.

I did try the drill in both ways and it didn’t make a difference. I do have the two hoses that go to the top and bottom of the oil cooler simply connected together with a short piece of pipe. I don’t know why this would matter. It’s almost like it isn’t picking up the fluid. I expected the pressure to build and then bog the drill down, but it’s not.

Any ideas?
Thanks!

[LeonardL]

Okay so my question is, where are you adding oil to replace what has leaked. Your leak can be either from the transmission or the machines hydraulic system. The two systems are not connected so if you're losing oil then where are you adding it back?

Your drill idea should have worked even at low RPM. You may need to spin it for a bit in order for the system to pressurize before it will show up if it is the transmission.

Your machine hydraulics are pressurized from the pump on the front of the motor. So if it is that system then you will need to either have the motor in place or come up with an alternative way to operate your hydraulics. Which isn't easy to do.

But you should be able to determine which system it is by simply learning which system you have to add oil to.

[georgia088]

Okay so my question is, where are you adding oil to replace what has leaked. Your leak can be either from the transmission or the machines hydraulic system. The two systems are not connected so if you're losing oil then where are you adding it back?

Your drill idea should have worked even at low RPM. You may need to spin it for a bit in order for the system to pressurize before it will show up if it is the transmission.

Your machine hydraulics are pressurized from the pump on the front of the motor. So if it is that system then you will need to either have the motor in place or come up with an alternative way to operate your hydraulics. Which isn't easy to do.

But you should be able to determine which system it is by simply learning which system you have to add oil to.

Thanks for the response! It is the transmission hydraulics I assume because the leak is coming from the bell housing. The bell housing was filling up with oil and getting on the clutch causing it to slip. I dropped the belly pan and could see the oils dripping from the bell housing weep hole. As far as I know, there is no way for the machines hydraulics to get inside of the bell housing.

It still will not build up pressure. It won’t even pump oil out of the hose where the filter is connected at the front of the engine if I disconnect that hose. Is it possible I damaged the pump by spinning it backwards? Doesn’t seem like it would, but I can’t think of any other reason for it not to pump fluid.

[georgia088]

Ok. Finally got it to pump. Apparently the hlr clutch arm that has the 1/2” head nuts that you do your pressure adjustments with has some issue. The little lever was not going all the way down which is apparently where it should be when the clutch is in the driving position (all the way against the stop). Once pushing it down and it stayed, the leak showed itself. It is pouring from the bushing that goes around the input shaft.

I assume there will be a seal in there that needs replacing. And I’m guessing the pedals have to come off and bell housing be completely removed to access this?

Thanks!

[georgia088]

Ok. Got bell housing off what a pain. Seal is definitely bad. Is there a bearing inside the front cover of the transmission? I can’t seem to find where it is on the parts breakdown.

[Jim B]

Did you ever get the SM2064 service manual? It would be a help to you at this point as it will be better organized than the parts breakdowns.

To find the parts you will need to look at a minimum of the front cover drawing, the drawing that has the front input shaft and countershafts, and the clutch oil pump drawing. Make sure you are looking at the HLR drawings not the ones for the constant mesh transmission.

[georgia088]

I do have a service manual, but I have a really hard time following it. It isn’t written where my pea brain can understand. Plus, I’m not 100% my machine matches it. I’m not even sure this is the original transmission for this loader. It’s really confusing.

I removed the front cover of the transmission and found the bearing. It is intact, but the shaft moves from side to side and up and down quite a bit. I am going to go ahead and replace it while I’m here.

Next problem. When I took the front cover off a spring about the size of my little finger ended up in my hand as I pulled the cover off. I’m not sure where it goes. I read a thread where the two of you discussed a mystery ball in/on the cover and where it goes on different models. I did not find a ball, but I’m not sure it didn’t fall out when I pulled the cover. I will look close tomorrow to see if I see it, but either way, where does this spring go? If there is no ball, what the heck does it do? I see a hole that it fits perfectly in, but I can’t imagine what it does if there is no ball or something it presses on?

I’m ordering parts… there are no gaskets available any more. Any advice on which gasket maker or compound to use?

Thanks yall!