JD 145 Loader Lift Cylinder Rebuild

[Jim.ME]

I definitely have only 1 quantity of part 4. My part 4 appears to be correct with the parts manual. What should be part 8 is different that part 4...so I don't have any identical parts in the assembly. I have a part number 8 that doesn't appear to be the correct part number 8...if that makes any sense. Attached are the 2 pistons next to eachother. The one on the left I think is correct. It has the split wear ring on it. The one on the right is the one not matching up with anything I can find. Thanks

Do you have two backup rings and an O-ring the size of the ones on the aluminum piston on the right?

 

[WangoTango]

Do you have two backup rings and an O-ring the size of the ones on the aluminum piston on the right?

Yes, they are new and were included in the kit AW16441. But so were the v seals....

 

[Jim.ME]

Yes, they are new and were included in the kit AW16441. But so were the v seals....

The kit included parts for the early and late model cylinders. You do not need to use the Vee packing if you have put the O-ring and backup rings on the aluminum piston. Assemble the components on the rod in the order you took them apart.

 

[WangoTango]

The kit included parts for the early and late model cylinders. You do not need to use the Vee packing if you have put the O-ring and backup rings on the aluminum piston. Assemble the components on the rod in the order you took them apart.

I can see that. So basically you think there are more differences to the serial break at 8999 than just the wiper ring? And it's just that those differences aren't depicted in the parts manual?

 

[Jim.ME]

I can see that. So basically you think there are more differences to the serial break at 8999 than just the wiper ring? And it's just that those differences aren't depicted in the parts manual?

Right now, given what you have and what parts were in the kit, I believe that. I am thinking the "seal", with the blue band around its OD, in your picture may be the other wiper seal mentioned in the parts catalog. Would it fit over the shaft and work in place of the metal backed oil seal as a wiper in the gland?

 

[WangoTango]

That seal is a bit of an anomaly. Its ID to small to be the the wiper ring. It is the same diameter as the threads at the top. I'm thinking it is a variation of the o ring part number 6? The OD of that seal (the one with the blue OD) is the same as the ID of the V Seal. That is...the seal with the blue OD will fit inside the v seals. Then that would fit on the threaded part of the shaft. I'll go take a picture of that in a few minutes.

 

[Jim.ME]

That seal is a bit of an anomaly. Its ID to small to be the the wiper ring. It is the same diameter as the threads at the top. I'm thinking it is a variation of the o ring part number 6? The OD of that seal (the one with the blue OD) is the same as the ID of the V Seal. That is...the seal with the blue OD will fit inside the v seals. Then that would fit on the threaded part of the shaft. I'll go take a picture of that in a few minutes.

Will it fit in the relieved area of the aluminum piston with the #6 O-ring, in the center of the inner seal lips, on the shaft? If it does and the steel and aluminum pistons will crush tightly together that is where I would put it.

 

[Fixingfarmer]

I don’t think you want that wiper you want a round black oring over the rod past where the threads go through the piston. Small thing. Other than that I think it will work as you have assembled just put the piston with the oring groove towards the rod.

 

[Fixingfarmer]

If it doesn’t have the groove it’s not the right one check the other piston they might just be out of order. That’s what’s actually missing from where the vee stack part of the piston is.

 

[Jim.ME]

If it doesn’t have the groove it’s not the right one check the other piston they might just be out of order. That’s what’s actually missing from where the vee stack part of the piston is.

The wear ring belongs closest to the nut.

 

[WangoTango]

Will it fit in the relieved area of the aluminum piston with the #6 O-ring, in the center of the inner seal lips, on the shaft? If it does and the steel and aluminum pistons will crush tightly together that is where I would put it.

The first picture is for reference. It is the wiper ring that does not appear to be used. The other pictures are the way the v seals and the blue seal appear to fit together. Buuuuuut....that doesn't mean they are supposed to be that way?

 

[Fixingfarmer]

No on the wiper seals in the vee they must have ended up there by accident usually they are tied together with a bread tie

 

[Fixingfarmer]

I’m thinking Jim.me is right throw all that away. There has to be another seal other than that wiper. There has to be a oring what’s the alluminum piston look like on the inside surface. Is it really that big a relief to accept that wiper?

 

[WangoTango]

I’m thinking Jim.me is right throw all that away. There has to be another seal other than that wiper. There has to be a oring what’s the alluminum piston look like on the inside surface. Is it really that big a relief to accept that wiper?

If I understand your question, yes. That recess is larger than any of the other seals. or v rings to fit inside. Nothing supplied fits inside there. There is a groove inside that larger piston that looks like it should fit some sort of seal for the threaded portion. But I haven't found anything that will fit the groove. Everything is either to thick of ID to fit over the threads, or to narrow to sit in the groove properly. I'll see if I can take a good picture of the inner groove.

 

[WangoTango]

The wear ring belongs closest to the nut.

Agreed

 

[Fixingfarmer]

I think this is a picture

 

[WangoTango]

I’m thinking Jim.me is right throw all that away. There has to be another seal other than that wiper. There has to be a oring what’s the alluminum piston look like on the inside surface. Is it really that big a relief to accept that wiper?

I don't know if you can see the groove very well in there or not. But nothing appears to fit. I still don't think it's the correct part. Or at least the part the manual refers to most of the time.

 

[Jim.ME]

The first picture is for reference. It is the wiper ring that does not appear to be used. The other pictures are the way the v seals and the blue seal appear to fit together. Buuuuuut....that doesn't mean they are supposed to be that way?

The odd seal is not a different gland wiper (where the metal backed oil seal is) as I first thought, and it does not get used with the Vee packing. The O-ring in this round of pictures is supposed to crush between the two parts that make up the piston with the Vee packing arrangement. Does the left-over seal fit into the recess of the aluminum piston? If it does it would be the seal for the shaft between the two parts of the piston. How tight does the inner part fit the shaft up past the threads.

 

[WangoTango]

The odd seal is not a different gland wiper (where the metal backed oil seal is) as I first thought, and it does not get used with the Vee packing. The O-ring in this round of pictures is supposed to crush between the two parts that make up the piston with the Vee packing arrangement. Does the left-over seal fit into the recess of the aluminum piston? If it does it would be the seal for the shaft between the two parts of the piston. How tight does the inner part fit the shaft up past the threads.

The OD of that seal does not fit the ID of the recess in the piston if I understand you correctly. There is quite a large gap between the two. 1/8" all around perhaps? The seal fits the threaded portion quite well, that's why I'm wondering if it is part of the seal listed as part 6 in the diagram. Attached is a picture of the seal fitting inside the recess of the piston. If I understand you correctly.

 

[Jim.ME]

The OD of that seal does not fit the ID of the recess in the piston if I understand you correctly. There is quite a large gap between the two. 1/8" all around perhaps? The seal fits the threaded portion quite well, that's why I'm wondering if it is part of the seal listed as part 6 in the diagram. Attached is a picture of the seal fitting inside the recess of the piston. If I understand you correctly.

Seeing it set in the piston I can see it doesn't go there. The O-ring you still have loose, does it fit the threaded end of the shaft? Is it thicker than the recess in the aluminum piston is deep? From some of your first pictures it appears the two piston sections were butted tight together, is that correct? Was there an O-ring between them when you took it apart?