Deere 6300 hydraulics

[Haybine1209]

Hi fellas, I'm having a problem with my 6300mfwd, I put it in the shed for a couple months and needed it a couple weeks ago to push snow, started just fine but no hydraulics on the steering, loader or 3pt, it however it would move when put into in gear, before I put it in the shed both original pumps were getting weak so I ordered both pumps (rexroth) and a conversion kit, and had them here to change in the spring, since it didn't have any hyd functions I went ahead and drained the system pulled the suction screen and changed both pumps and a new filter, and I regained a little hyd function but not much, I installed a guage in the "P" port and am getting 250# at standby and when I select a function it may spike to 1000 psi then drop off to zero and I lose what little hyd pressure I had, I've read about the priority inlet valve so I pulled it took it apart and made sure the valves were free and not stuck checked for cracks in it and 3scv's and 3pt valve, and made sure the "dime discs" were there and reinstalled, I have the same result and nothing changed, any insite would be appreciated thank you.

 

[Tx Jim]

Welcome to this forum

It's possible hyd system is contaminated with water.

How many hrs of use since hyd filter was changed & hyd oil suction screen checked/cleaned?????

I hope you performed very good hyd diagnostic procedures before considering replacing hyd pumps or other hyd components.

During my many yrs associated of repairing hyd systems I've read/heard of many hyd pumps being replaced only to determine that the replaced hyd pump was good IE not the hyd problem!!

I have no personal experience diagnosing/repairing PFC hyd systems.

No harm intended or implied but JD hay cutters/windrowers were called Mower-conditioners(Mo-Co). New Holland hay cutters were called Haybines.

I demonstrated/sold new JD 1209 Mo-Co's from '73-'82 . IIRC Mo-Co & Haybine are trademark names.

https://partscatalog.deere.com/jdrc/sidebyside/equipment/11970/referrer/search/pgId/1822579/partnumber/R53169/callout/7

 

[Haybine1209]

Welcome to this forum

It's possible hyd system is contaminated with water.

How many hrs of use since hyd filter was changed & hyd oil suction screen checked/cleaned?????

I hope you performed very good hyd diagnostic procedures before considering replacing hyd pumps or other hyd components.

During my many yrs associated of repairing hyd systems I've read/heard of many hyd pumps being replaced only to determine that the replaced hyd pump was good IE not the hyd problem!!

I have no personal experience diagnosing/repairing PFC hyd systems.

No harm intended or implied but JD hay cutters/windrowers were called Mower-conditioners(Mo-Co). New Holland hay cutters were called Haybines.

I demonstrated/sold new JD 1209 Mo-Co's from '73-'82 . IIRC Mo-Co & Haybine are trademark names.

https://partscatalog.deere.com/jdrc/sidebyside/equipment/11970/referrer/search/pgId/1822579/partnumber/R53169/callout/7

Is this a generic reply??

 

[Tx Jim]

NO but to perform good hydraulic diagnostics one should first start with the easiest questions/procedures first.

Are you asking if my reply is a generic reply because I copied/pasted my reply to another tractor discussion forum that I've also been a member of for several yrs where you asked the same identical question?

 

[buickanddeere]

Ice

 

[Haybine1209]

NO but to perform good hydraulic diagnostics one should first start with the easiest questions/procedures first.

Are you asking if my reply is a generic reply because I copied/pasted my reply to another tractor discussion forum that I've also been a member of for several yrs where you asked the same identical question?

No sir it's because I stated that the fluid and filter has been changed, no water intrusion. I don't like a generic answer to an obviously unread question. Thank you.

 

[used red MN]

No sir it's because I stated that the fluid and filter has been changed, no water intrusion. I don't like a generic answer to an obviously unread question. Thank you.

Hello Haybine, welcome to YT! I think you are getting off on the wrong foot here. Tx Jim is one of the most knowledgeable John Deere guys on this forum. I can’t speak for his experience with this some what newer machine, but his knowledge on the New Generation and Waterloo Iron Horse tractors is very broad. I have minimal knowledge on those tractors but I believe they have a pressure compensated hydraulic system which the dime discs you mention are a part of. Do you have a repair manual for this tractor? If not that is probably nearly an essential item needed to repair the hydraulics.

 

[Haybine1209]

Hello Haybine, welcome to YT! I think you are getting off on the wrong foot here. Tx Jim is one of the most knowledgeable John Deere guys on this forum. I can’t speak for his experience with this some what newer machine, but his knowledge on the New Generation and Waterloo Iron Horse tractors is very broad. I have minimal knowledge on those tractors but I believe they have a pressure compensated hydraulic system which the dime discs you mention are a part of. Do you have a repair manual for this tractor? If not that is probably nearly an essential item needed to repair the hydraulics.

Thanks for the info, no I don't have a tech manual yet, I have a printed copy on order, I cut my teeth at Deere as a tech from 81-86 and can take care of the older stuff, from 2cyl up to the 50 series but I've been away from the ag part too long to know how these systems operate, it's hard for me being in my 60's to address redundancy politely, I'm sorry if I offended anyone.

 

[used red MN]

Thanks for the info, no I don't have a tech manual yet, I have a printed copy on order, I cut my teeth at Deere as a tech from 81-86 and can take care of the older stuff, from 2cyl up to the 50 series but I've been away from the ag part too long to know how these systems operate, it's hard for me being in my 60's to address redundancy politely, I'm sorry if I offended anyone.

Okay, no problem. I’m 63, but changed careers sort of mid life. Been away from mechanical repair as my income source for over 25 years.

 

[Tx Jim]

No sir it's because I stated that the fluid and filter has been changed, no water intrusion. I don't like a generic answer to an obviously unread question. Thank you.

Please forgive me but as I have aged to 80 yrs of age my reading compression is not a good as it was in my youth. I was employed at JD dealership for 21 yrs & serving last 13 yrs as the dealer service manager. I left JD dealer before 6300 type of hyd's was introduced by JD.

I was taught many years ago that breaking texts into paragraphs causes text to be much easier to read/comprehend especially for an older person such as i am.



.

 

[Tx Jim]

Hello Haybine, welcome to YT! I think you are getting off on the wrong foot here. Tx Jim is one of the most knowledgeable John Deere guys on this forum. I can’t speak for his experience with this some what newer machine, but his knowledge on the New Generation and Waterloo Iron Horse tractors is very broad. I have minimal knowledge on those tractors but I believe they have a pressure compensated hydraulic system which the dime discs you mention are a part of. Do you have a repair manual for this tractor? If not that is probably nearly an essential item needed to repair the hydraulics.

Thank you for your compliment. My knowledge of model 6300 PFC hyd system is also limited.

 

[rockcreek4630]

You need the test book to. You said both pumps were replaced I assume it was the charge and main pumps. The transmission has its own pump. With your gauge hooked up go through each function and stall it out and see what happens if this doesn't show anything start trying combinations. This is to try to find a problem in the load scene .

 

[buickanddeere]

Trouble shooting testing and diagnosing beats taking a guess and throwing parts at the problem

 

[Jim.ME]

I expect you already know this but am throwing it out there in case someone reading this does follow the "You need the test book to." that rockcreek4630 mentioned. The 6300 series requires two technical manuals. TM4523 is the Repair manual (wrenching info). And TM4524 is the Diagnostic manual, it has the specs and info you will need for testing the systems.

 

[Haybine1209]

Please forgive me but as I have aged to 80 yrs of age my reading compression is not a good as it was in my youth. I was employed at JD dealership for 21 yrs & serving last 13 yrs as the dealer service manager. I left JD dealer before 6300 type of hyd's was introduced by JD.

I was taught many years ago that breaking texts into paragraphs causes text to be much easier to read/comprehend especially for an older person such as i am.



.

I hear you on the eyesight, I've had retinal bleeds, injections, retinal surgery and cataract surgery on both eyes, I can finally see again! Much respect to you, I'm in the same boat I left Deere when the 50 series came out, although I've worked on the heavy equipment side quite a bit in recent years just have no experience with the new tractor systems. I appreciate your help. I haven't had time to get back on it this week I've had one of my Dumptrucks 3406c spin a bearing and been building it all while trying to add on to my shop while the weather is good, a lot on my plate, I'll keep this updated even after I find a resolution, a lot of problems are resolved but the outcome isn't posted so a lot of times it's a dead end when researching it.

 

[Haybine1209]

Trouble shooting testing and diagnosing beats taking a guess and throwing parts at the problem

I agree, the pumps needed replaced they were down on pressure and making metal, I cleaned the pickup screen and changed filters twice a year or about every 100hrs, and alway cut my filters open and inspect them.

 

[Haybine1209]

Found a problem, why would it twist the main shaft off like this unless the destroking valve didn't work and send the excess to sump, there wasn't any signs of deadheading, engine never pulled down, just about POP while idling, I oiled pump prior to installation as to not run dry, but she's locked up internally,

 

[rockcreek4630]

You're going to have to open it up to see what happened too much pressure, forien material, lack of oil.

 

[buickanddeere]

I’m

Found a problem, why would it twist the main shaft off like this unless the destroking valve didn't work and send the excess to sump, there wasn't any signs of deadheading, engine never pulled down, just about POP while idling, I oiled pump prior to installation as to not run dry, but she's locked up internally,

Pretty sure that is an open centre pump . Open centre systems do not destroke . They pump full volume all the way around the hydraulic system . Then the oil returns to sump .
The system builds pressure when flow is forced into a load such as a hydraulic ram .
Should the system pressure exceeded max rated . A reload valve is supposed to open and divert flow to the sump .
What pressure does the relief valve lift at ?

 

[Tx Jim]

JD 6300 has Closed-center pressure flow compensated hydraulics which I have no personal experience with.