Thank you very much! I will try my best to get the Rebuild done as soon as possible with detailed instructions. The install will follow later, as I still have to take the rear-end/ transmission apart. Once that is finalized, I can merge the hydraulic motor to the rear end. I'll keep you posted. Best regards.
Thanks for your feedback, it means a lot to me! I also try to offer as much as possible and I’ve already learned a lot while making videos, so hopefully my newer videos be of better help😊👍🏼 Regards Andreas
You are very welcome and I am happy I can share this content with John Deere enthusiasts! These garden tractors are very robust and they deserve to be around for many more years. Thank you for your kind words. Best regards
Wow man, takes total balls to completely tear down one of those units. I've watched some of your other videos and you already earned my respect for being a good tech, but this takes the cake. I'm looking forward to watching more.👍👍👍🙂
Thank you so much for tuning in and watching some of my videos!! I appreciate your kind comment and feedback. This hydraulic motor/pump is a great little unit and it's really not that complicated when you look at the components separately. I hope to share more valuable content in the near future! Regards Andreas
That is correct. As of right now, I have 8 projects on the go and I will give all projects attention. I will have a list in the description in the upcoming Rebuild Video with all the seals and orings. I will take my time to find parts online and share those links below. Thanks for letting me know, I really take feedback seriously :D Best regards
I'm actually not quite sure which hydraulic motor the 318 has. It's possible that they used this one or the U-Pump which is on the 317. I have the setup as a mower tractor, so I'm not sure if I can use it much once the snow hits. I would love to find a blade of snowblower, but in my area there isn't that much for sale lately. Best regards
Good day, I was wondering if you can maybe give me some advice, I just finished a full restoration on a small gas powered new holland skid steer, I have two of the 15 series sundstund axial piston pumps, closed loop with drive motors for the wheels, everything works great , good charge pressure and working pressure as I can drive into a pile and stall the 20hp engine, my only problem I think as I’ve never owned a skid loader is that I find it very noisy, like hydraulic whine , it just seems not right, it does get worst when warm or in lower rpm’s, I’m thinking of pulling a pump apart but I’m not sure what I’m looking for that would make this issue?, thanks for your time
Hello Rick, if it is an older skidsteer it will most likely have a whine to it while operating. I have a Thomas skidsteer from the 80's and the whine is far more noticeable than on any of my smaller hydrostatic drive garden tractors. I'm literally sitting on top of the hydraulic pump and there is no sound deadening material anywhere. Back to your issue: If you have a high pitch whine, you might have issues with your hydraulic pump input shaft bearings. Excess play (wear) on your shaft can cause your swash plate to wear unevenly, thus causing your hydraulic flow to be interrupted from time-to-time or even cause internals issues. In the assembly video of this hydraulic pump / motor you can see me address the wear on the swash plates themselves. Here is the link to that video: ruclips.net/video/6Z7LK63ZChQ/видео.html At minute 18:55 in the assembly video, you can see the wear on the swash plate. After many hours, the piston barrel assembly can see wear due to cavitation or aeration, so if you decide to take your pump apart, have a good look at the piston barrel assembly. Whatever has excess wear or whatever parts have damage NEED to be replaced. If not you will run into fatal internal hydraulic pump damage. I hope this will help along your repair and diagnosis! Regards Andreas
@@WorkshopRebuild thanks for the info, greatly appreciated, yes, I also sit right on top of both pumps, I think your right, older machines make more noise, mines a 95. I do find if I run the rpm’s up higher it’s not as noisy other then the engine now😅
Is there only one fluid reservoir for both the hydrostatic drive and the hydraulic implements? After a fluid flush at the service center I am getting a loud howl after a few minutes of using the hydrostatic drive. Fluid level seems ok on the dip stick on the back, under the seat. Other than the noise it seems to be performing fine but I have it parked until I can get some answers.
Hello Camron, that is correct there is only one fluid reservoir for the hydraulic motor and the charge pump. The fluid is stored within the rear-end (transmission) of the John Deere 400. If you have a very loud howl in your rear-end there might be an issue, but nothing that I can determine from my end. The John Deere 400 does not have a dipstick, or at least it did not have one from factory. There is a square fitting on the back of the transmission with a clear tube hooked up to it, that runs from the middle to the top of the transmission. Your fluid level should be exactly between the middle and the top. If you do not see any oil within these two points, that means you do not have enough in your system and you must add oil immediately! I hope this helps and if you have any other questions, feel free to ask. Regards Andreas
@@WorkshopRebuild My father purchased this JD400 new in '74 or '75 about the time I graduated high school. To my knowledge it has always had a dip stick. It seems be a standard JD part because when the service center flushed the hydraulic system, including the lines on the front blade they broke the original dip stick. They were able to readily replace it, I assume from JD inventory. It looks identical to the old dip stick but as I don't have the original I can't verify that they are the same length. New fluid is crystal clear to the point it is very difficult to see, the old fluid had a reddish color. If I could attach a photo of the dip stick assembly I would. After I got the JD400 back from service and it has the howl when running the hydrostatic drive I remembered the old tech, that had done all the tech work and now long since retired, telling me not to let anyone put the 'new style' fluid in it. I can't find any old school techs that know what he was referring to. I have attempted to contact JD directly but I was told that the JD service manager needs to initiate the inquiry. It has been a month or two with no word. In the meantime I have the JD400 parked for fear of causing damage.
That's very interesting that your John Deere 400 has a dipstick. I went through the whole transmission and I did not see any area for a dipstick. I wonder if you have a dipstick on the top fitting for the oil level tube? You can see this tube clearly at minute 02:29 in this video here: ruclips.net/video/pehVUaeDNn4/видео.html The fluid John Deere uses nowadays is called HyGard lo-vis, but that's just a company preference and marketing thing. This hydraulic motor setup was placed within a handful of garden tractor brands like Bolens, IH, Case, MF etc. They all recommended different fluids, but ATF Type-F (Automatic Transmission Fluid) was a recommendation for all brands. If the original fluid was red in color than it was most likely ATF fluid, or possibly something they made back in the day that I don't know of. If it doesn't sound right and it seems to be worse than when you brought it to JD, than you should get in touch with them again. At the end of the day, they serviced your machine and they should be able to have an explanation for you. I hope this will help you find a solution. Regards Andreas
Great job so far. Definitely watching for the rebuild and install.
Thank you very much! I will try my best to get the Rebuild done as soon as possible with detailed instructions. The install will follow later, as I still have to take the rear-end/ transmission apart. Once that is finalized, I can merge the hydraulic motor to the rear end. I'll keep you posted. Best regards.
Thanks for your videos. They are very informative and I find myself referencing them often. Good work.
Thanks for your feedback, it means a lot to me! I also try to offer as much as possible and I’ve already learned a lot while making videos, so hopefully my newer videos be of better help😊👍🏼
Regards Andreas
Thank You for this video and all the other 400 series J.D's. Will be invaluable if anyone needs to go deep in repair.
You are very welcome and I am happy I can share this content with John Deere enthusiasts! These garden tractors are very robust and they deserve to be around for many more years. Thank you for your kind words. Best regards
Wow man, takes total balls to completely tear down one of those units. I've watched some of your other videos and you already earned my respect for being a good tech, but this takes the cake. I'm looking forward to watching more.👍👍👍🙂
Thank you so much for tuning in and watching some of my videos!! I appreciate your kind comment and feedback. This hydraulic motor/pump is a great little unit and it's really not that complicated when you look at the components separately. I hope to share more valuable content in the near future! Regards Andreas
Great job, been looking for such a video to begin the rebuild of my 400. Thanks!
Thank you Gary, I appreciate your feedback! I hope you will be able to rebuild your JD400 hydraulic motor/pump with this video. Regards Andreas
Hi there, the pesky cheese head, now you are doing your 400, would you mind posting part numbers and or where you got the parts, thank you
That is correct. As of right now, I have 8 projects on the go and I will give all projects attention. I will have a list in the description in the upcoming Rebuild Video with all the seals and orings. I will take my time to find parts online and share those links below. Thanks for letting me know, I really take feedback seriously :D Best regards
Nice video! That is the same system as the jd 318. Will we be seeing your 317 in a video soon?
I'm actually not quite sure which hydraulic motor the 318 has. It's possible that they used this one or the U-Pump which is on the 317. I have the setup as a mower tractor, so I'm not sure if I can use it much once the snow hits. I would love to find a blade of snowblower, but in my area there isn't that much for sale lately. Best regards
Good day, I was wondering if you can maybe give me some advice, I just finished a full restoration on a small gas powered new holland skid steer, I have two of the 15 series sundstund axial piston pumps, closed loop with drive motors for the wheels, everything works great , good charge pressure and working pressure as I can drive into a pile and stall the 20hp engine, my only problem I think as I’ve never owned a skid loader is that I find it very noisy, like hydraulic whine , it just seems not right, it does get worst when warm or in lower rpm’s, I’m thinking of pulling a pump apart but I’m not sure what I’m looking for that would make this issue?, thanks for your time
Hello Rick, if it is an older skidsteer it will most likely have a whine to it while operating. I have a Thomas skidsteer from the 80's and the whine is far more noticeable than on any of my smaller hydrostatic drive garden tractors. I'm literally sitting on top of the hydraulic pump and there is no sound deadening material anywhere.
Back to your issue: If you have a high pitch whine, you might have issues with your hydraulic pump input shaft bearings. Excess play (wear) on your shaft can cause your swash plate to wear unevenly, thus causing your hydraulic flow to be interrupted from time-to-time or even cause internals issues.
In the assembly video of this hydraulic pump / motor you can see me address the wear on the swash plates themselves. Here is the link to that video: ruclips.net/video/6Z7LK63ZChQ/видео.html
At minute 18:55 in the assembly video, you can see the wear on the swash plate.
After many hours, the piston barrel assembly can see wear due to cavitation or aeration, so if you decide to take your pump apart, have a good look at the piston barrel assembly.
Whatever has excess wear or whatever parts have damage NEED to be replaced. If not you will run into fatal internal hydraulic pump damage.
I hope this will help along your repair and diagnosis! Regards Andreas
@@WorkshopRebuild thanks for the info, greatly appreciated, yes, I also sit right on top of both pumps, I think your right, older machines make more noise, mines a 95. I do find if I run the rpm’s up higher it’s not as noisy other then the engine now😅
Is there only one fluid reservoir for both the hydrostatic drive and the hydraulic implements? After a fluid flush at the service center I am getting a loud howl after a few minutes of using the hydrostatic drive. Fluid level seems ok on the dip stick on the back, under the seat. Other than the noise it seems to be performing fine but I have it parked until I can get some answers.
Hello Camron, that is correct there is only one fluid reservoir for the hydraulic motor and the charge pump. The fluid is stored within the rear-end (transmission) of the John Deere 400.
If you have a very loud howl in your rear-end there might be an issue, but nothing that I can determine from my end. The John Deere 400 does not have a dipstick, or at least it did not have one from factory. There is a square fitting on the back of the transmission with a clear tube hooked up to it, that runs from the middle to the top of the transmission. Your fluid level should be exactly between the middle and the top.
If you do not see any oil within these two points, that means you do not have enough in your system and you must add oil immediately!
I hope this helps and if you have any other questions, feel free to ask. Regards Andreas
@@WorkshopRebuild My father purchased this JD400 new in '74 or '75 about the time I graduated high school. To my knowledge it has always had a dip stick. It seems be a standard JD part because when the service center flushed the hydraulic system, including the lines on the front blade they broke the original dip stick. They were able to readily replace it, I assume from JD inventory. It looks identical to the old dip stick but as I don't have the original I can't verify that they are the same length. New fluid is crystal clear to the point it is very difficult to see, the old fluid had a reddish color. If I could attach a photo of the dip stick assembly I would. After I got the JD400 back from service and it has the howl when running the hydrostatic drive I remembered the old tech, that had done all the tech work and now long since retired, telling me not to let anyone put the 'new style' fluid in it. I can't find any old school techs that know what he was referring to. I have attempted to contact JD directly but I was told that the JD service manager needs to initiate the inquiry. It has been a month or two with no word. In the meantime I have the JD400 parked for fear of causing damage.
That's very interesting that your John Deere 400 has a dipstick. I went through the whole transmission and I did not see any area for a dipstick. I wonder if you have a dipstick on the top fitting for the oil level tube? You can see this tube clearly at minute 02:29 in this video here: ruclips.net/video/pehVUaeDNn4/видео.html
The fluid John Deere uses nowadays is called HyGard lo-vis, but that's just a company preference and marketing thing. This hydraulic motor setup was placed within a handful of garden tractor brands like Bolens, IH, Case, MF etc. They all recommended different fluids, but ATF Type-F (Automatic Transmission Fluid) was a recommendation for all brands.
If the original fluid was red in color than it was most likely ATF fluid, or possibly something they made back in the day that I don't know of.
If it doesn't sound right and it seems to be worse than when you brought it to JD, than you should get in touch with them again. At the end of the day, they serviced your machine and they should be able to have an explanation for you. I hope this will help you find a solution. Regards Andreas