As a service technician, there's nothing like the thrill of the hunt, and then the drive home after you've whipped it. A good tech knows to break it down into its simple parts, and methodically build it back...great troubleshooting, sir! Btw, really dig the music choices.
Running an old 9500 and I can't stress the importance of making sure the combine is blown off and clean every day. It physically hurt my brain to see that too
I've grown up loving machinery. The level of engineering and complexity of the machines that you work on fascinate me. You definitely know your way around the equipment and all the parts that make it work. I enjoy watching your videos and your approach to reviewing what you've learned so it's available for future work makes perfect sense. Each problem is an opportunity to learn something new. Thank you.
This was one of the best things I have ever watched. After spending 25+ years troubleshooting assembly equipment in an auto plant, this reminded me of some challenging problems I worked on that also involved a combination of potential electrical and hydraulic or pneumatic problems. At least you didn't have a production manager standing behind you asking every 5 minutes how long before the line restarts and then wondering why you couldn't figure it out "right away". Great job of working and learning so you can apply the knowledge next time.
It's great to be inside the thought process of a good mechanic. I think you were right on about the low pressure standby pressure being the issue. Keep going with the in-depth diagnostics, hands down favorite parts of your vids. Keep it up!!
Zeth, your knowledge and experience is awesome. I agree you usually learn something new on every job. Thanks to Sloan Implement for allowing you to share your experiences. I am sure you get slowed down showing and explaining the repair you are doing but it may get you and Sloan more business because we can see the process you go through. You aren't just slapping parts on to see if it works, you diagnose and go from there. Thanks
Modern closed center load sense systems can be extremely complicated and there are literally hundreds of place for LS pressure to leak off. Even talented, experienced, professional service techs have to resort to being a “parts changer” sometimes. Great work, Zeth!
Great job. First and most importantly you got that customer back up and running as quickly as you possibly could. The fact that you learned something new to check next time is a bonus. Job well done.
Hi Zeth, great video as always. You brought back a specific memory that I took with me all my life. When I was an apprentice my Journeyman always said that "Every day was a learning day", and that I would learn more on the job that I ever would in the School" He was 45 years older than me and he also always said that he was still learning too! And he was 100% accurate. Thanks for taking us along.
Very impressive diagnostics. I was unfamiliar with the whole load sense concept. The hydraulic systems I am familiar with just continuously make pressure.
Thank you for this video. I have an older combine (JD 9750) but it has almost the EXACT SAME issues. My local dealership so far has been unsuccessful in being able to diagnose what the problem actually is. The older combine has to be somewhat similar to where one could use a very similar way, or maybe exactly follow the steps that you did here. Very interesting video.
Your channel is sophisticated. All the technology that is packed into farm machinery is impressive. It is wonderful when it works and frustrating when it doesn't. Thank you for sharing your expertise. 😊
I don’t see that one as a failed diagnostic at all. There’s no way of knowing if that valve body didn’t have a crack or debris scratch in it without getting with Deere refurbishment later (good luck). You worked the problem to a successful fix. Great job! I was a John Deere road tech for years as well and understand what you are up against most times
I understand that John Deere wants their technicians to follow a certain procedure but, from the very start my gut was telling me it's that valve block. With today's machines, I've seen too many issues and it always goes back to the valve block. All the more reason as why I hate today's equipment. Too much electronics controlling stuff that should be controlled manually. We've gotten lazy. Still enjoyed the hunt. Yes, you're absolutely correct about applying what you learn. If you ain't learning something new everyday, you ain't living. Great video, cheers :)
You are a very tolerant Master Tech working on such a dirty combine. Owner could have at least blew it off where you were working! I would be embarrassed as an owner leaving the machine for you to work onM
It’s a lot of fun to hunt down real problems using schematics. Cool that you figured the block was cracked or something. Guessing you didn’t find the crack
When troubleshooting load sense always make sure the differential pressure is high enough and also if you are losing load sense pressure look at the check values in the component that works correctly. That function is working correctly because the check valves everywhere else are working.
I remember you saying that you had to add some hy-gaurd when you first arrived. I'm wondering if the owner had been fighting a leak and was having to top it off daily. When hands doing daily service, blowing out radiators, and air filters it causes a very dirty environment for adding oil. Since you had to boost pressure, I wonder if all the hydraulic filters and screens were clean. One thing about variable piston pumps is maintaining immaculately clean fluid is vital to its longevity. If it's had dirty fluid running through it then it's efficiency could be greatly diminished. Owners and operators that are use to the older equipment prior to variable piston pumps don't understand the extreme importance of maintaining an immaculately clean system.
we have a newer dealer ship owner here that has a lot of stores that will not sell parts to other dealer ships or farmers that are not their regular custumers and it sucks when sum parts are hard to find and they wont share
Worked on a MX270 last spring. They use a Vickers pump set up with a load sense competition valve system. Pump went into full stroke for a bit, then nothing. We had load sense pressure. Turned out to be a bad compensation valve.
Being in the automotive service profession for the last 50 years, I’m curious why you wouldn’t let your consumer drive 5+ hours instead of just having the pump assembly shipped overnight? Good job on the repair.
@@conebone669 still doesnt make sense why everything else works as should and head lift doesnt without tricking it... you'd think it would show inconsistencies elsewhere?
Y es, better music! One of my ancillary jobs was to verify piping diagrams for submarine nuclear power plants before refueling overhaul. Zeth is great, it would have been great to work with him.
Zeth, I'm a bit unclear why you upped the pressure prior to trying out with the new valve block installed. Does that not leave a doubt as to where the problem actually was?
Yes that was the point of my analysis at the end. That the problem could have been the compensation valve on the pump and not having enough standby pressure.
@@ZKMasterTech understand that just wondered whether you tried the new valve first then upped the pressure even if you were leaving the new valve in place it may have helped know for the next time? Awesome videos btw
do you think all the extra weight from the folding corn head had some thing to do with the block failer,on my 9760 the wisker switch for my hillco levaler stuck and cracked the aluminum hilco block it was replaced with a new cast block and my s670 hillco block has a aluminum block,go figure that one out.great job by the way.
Hi Zeth I have seen cracks in blocks also especially ones that are so full of valve , orifices. The tolerances are so tight that passages can cross over if a internal crack occurs. Could you please tell me was that block aluminum or steel & did the valve block change not resolve the issue and the standby was the real issue, on our Drill rigs our standby on rexroth piston pumps is 30bar and it’s interesting to see this issue for future thinking also 👍
Do you ever have problems with all of the debris around all those belts and pulleys and moving parts causing friction you need to take that to the edge of the field and break out the big diesel driven air compressor and spend about a half an hour just blowing everything off and breaking out the shovel or the garden tools to rake all that stuff out of there or is that something you do at the end of the season before you put her up for the long winter
Greetings Seth from Oz. I’m currently running an aging S680 and having issues with the auger swing switch on the hydro handle. Frankly; it’s worn out. I’m told that it’s not available as a seperate part; and that the entire hydro handle needs to be replaced. Do you believe this to be the case. Regards
Yes there's nothing like Knowing how the systems work on these bits of green Iron ... made more interesting with the Computer over management of all the systems . Being Qualified at the Time Computer controlled systems were being introduced i guess i was more open to how they could help and or hinder operations of the machine system's . At least some times they leave reporting of issues on screen but ... Service ability of JD iron leaves a little to be desired ... ie that Transmission issue of solenoid valve .. yes it has to be tucked away to protect from Mechanical Damage but if you can't Swap out component because of access issues it becomes a point just how much you have to dismantle to correct the fault ... The big Question was asked when i was a Ag Engineering Student was What happens whent these Electronic System become 2nd 3rd and fourth hand do you just put them in the Crusher ... Nothing Like them olde Green and Yellow two cyclinder Poppers i thinks thats what you state side guys and girls call em lol ...
Hi Zeth, I always enjoy your videos and I have learned a lot from you, my name is Abel, I own a 9500 combine down in Mexico and some times I need assistance on some troubleshooting problems when they happen. I wonder if there is a way to get in contact with you if I need help, of course with some payment for your help. Please let me know and how we can get in contact.
What is "D.R" I know its where you check the Combine Hydraulic Pressure on the Valves, but what does "DR" actually mean Please?? Surely it should be "DT" Diagnostic Testing or "DP" Diagnostic Point, but why "DR"?? Another Ex John Deere Service Technician from the UK 🇬🇧😎
You would think the owner would have cleaned the machine some if he knows you will be working on it. If I were you I think I would have told him clean it up and I will fix it. Not very much fun digging around corn chaff when your working on fod sensitive valves...
I wonder if JD keeps track of parts such as what you changed out to determine failure rate and whether an engineering/manufacturing issue exists. Are service bulletins or recalls issued if there are multiple failures of a particular component? Is the control box you replaced serialized? Do JD engineers ever destructive-test these replaced components to determine cause of failure? I assume many parts of a combine are not built by JD and are probably made in China or Mexico - so failure of components is no doubt becoming more and more common. For want of a nail a shoe was lost. For want of a hydraulic component, a combine was lost. 2 cents
I’m not sure about older machines but with newer ones the whole JD link and being proactive instead of reactive is deeres new thing. Yeah if a part failed on a certain serial number range of machine and they see a trend. They send out alerts to the dealers and maybe the customers somehow. If not then the dealer notifies the customer that hey this part fails at 250hrs so we want to take care of that before your machine goes down. Something along those lines and I’m sure they look at the failed parts and make improvements. Something along those lines anyways
@@josephcooksley3219 I say this because I myself have been a mechanical engineer for John Deere for ten years. Everything is correct, it is enough to know the principle of operation and understand the hydraulic circuits.
As a service technician, there's nothing like the thrill of the hunt, and then the drive home after you've whipped it. A good tech knows to break it down into its simple parts, and methodically build it back...great troubleshooting, sir! Btw, really dig the music choices.
IMPRESSIVE diagnostics. You are really GOOD! (side note: the debris the farmer left packed around all the pulleys seems like a fire waiting to happen)
Made me cringe seeing that
Running an old 9500 and I can't stress the importance of making sure the combine is blown off and clean every day. It physically hurt my brain to see that too
I could listen to that engine start all day. Love that noise!
I've grown up loving machinery. The level of engineering and complexity of the machines that you work on fascinate me. You definitely know your way around the equipment and all the parts that make it work. I enjoy watching your videos and your approach to reviewing what you've learned so it's available for future work makes perfect sense. Each problem is an opportunity to learn something new. Thank you.
Thank you very much!
This was one of the best things I have ever watched. After spending 25+ years troubleshooting assembly equipment in an auto plant, this reminded me of some challenging problems I worked on that also involved a combination of potential electrical and hydraulic or pneumatic problems. At least you didn't have a production manager standing behind you asking every 5 minutes how long before the line restarts and then wondering why you couldn't figure it out "right away". Great job of working and learning so you can apply the knowledge next time.
Zeth I bet the farmers you service breath a sigh of relief when they see you drive up to their locations. Another great clip!
It's great to be inside the thought process of a good mechanic. I think you were right on about the low pressure standby pressure being the issue. Keep going with the in-depth diagnostics, hands down favorite parts of your vids. Keep it up!!
Zeth, your knowledge and experience is awesome. I agree you usually learn something new on every job. Thanks to Sloan Implement for allowing you to share your experiences. I am sure you get slowed down showing and explaining the repair you are doing but it may get you and Sloan more business because we can see the process you go through. You aren't just slapping parts on to see if it works, you diagnose and go from there. Thanks
Modern closed center load sense systems can be extremely complicated and there are literally hundreds of place for LS pressure to leak off. Even talented, experienced, professional service techs have to resort to being a “parts changer” sometimes. Great work, Zeth!
Nothing is simple on that larger equipment, beautiful job zeth
Great job. First and most importantly you got that customer back up and running as quickly as you possibly could. The fact that you learned something new to check next time is a bonus. Job well done.
I didn’t understand a lot but when I really understand is how involved a technician job is! WOW!
Hi Zeth, great video as always. You brought back a specific memory that I took with me all my life. When I was an apprentice my Journeyman always said that "Every day was a learning day", and that I would learn more on the job that I ever would in the School" He was 45 years older than me and he also always said that he was still learning too! And he was 100% accurate. Thanks for taking us along.
I have the same problem. does not raise the feeder chamber all the way. Tomorrow I'll go and measure my waiting pressure. Thank you for the video.
Professionalism is a basic element in a successful business-----you have it.....
Very impressive diagnostics. I was unfamiliar with the whole load sense concept. The hydraulic systems I am familiar with just continuously make pressure.
Great job Zeth. 1st class video as always. Old time customizer Gene Winfield used to say "every day's a school day".
So true!
That's something you don't see everyday!!! Thanks!!!
Thank you for this video. I have an older combine (JD 9750) but it has almost the EXACT SAME issues. My local dealership so far has been unsuccessful in being able to diagnose what the problem actually is. The older combine has to be somewhat similar to where one could use a very similar way, or maybe exactly follow the steps that you did here. Very interesting video.
Well, that was certainly a challenge, well done with the diagnostics. Now you can relax and have a good week end.
Zeth / well done - I like the summation of the industry and learning curve, it’s enormous, and stressful- keep up the the awesome and necessary work.
Your channel is sophisticated. All the technology that is packed into farm machinery is impressive. It is wonderful when it works and frustrating when it doesn't. Thank you for sharing your expertise. 😊
I don’t see that one as a failed diagnostic at all. There’s no way of knowing if that valve body didn’t have a crack or debris scratch in it without getting with Deere refurbishment later (good luck). You worked the problem to a successful fix. Great job! I was a John Deere road tech for years as well and understand what you are up against most times
Hard one to figure out Zeth. I was hoping you could show us the hydraulic circuit diagram. Well done anyhow.
As usual you are a very good machine Dr. Thank You for taking the time to share with us
Great learning Video. So good to have you back. Thanks.
Outstanding troubleshooting skills put to work for a successful outcome. Well done
Great presentation of a sticky problem and the follow up analysis!
Tuning the pump to give 'er the onions! Way too much, perfect.
Do what you have to sometimes to keep them going...
I understand that John Deere wants their technicians to follow a certain procedure but, from the very start my gut was telling me it's that valve block. With today's machines, I've seen too many issues and it always goes back to the valve block. All the more reason as why I hate today's equipment. Too much electronics controlling stuff that should be controlled manually. We've gotten lazy. Still enjoyed the hunt. Yes, you're absolutely correct about applying what you learn. If you ain't learning something new everyday, you ain't living. Great video, cheers :)
Really impressive! Digging the new soundtrack too!
You are a very tolerant Master Tech working on such a dirty combine. Owner could have at least blew it off where you were working! I would be embarrassed as an owner leaving the machine for you to work onM
Another Great Video full of valuable insight and information. Thank you SIR
Great video man! forgot how much I don't miss the green side!!
You know you miss it!
Zeth. Thanks for playing something other than country in your vids. That crap makes me feel old. 🤘
I hardly ever play country. Usually have people complain that it’s too heavy lol.
@@ZKMasterTech uh...Slaaaayaaaaa!!!
It’s a lot of fun to hunt down real problems using schematics. Cool that you figured the block was cracked or something. Guessing you didn’t find the crack
When troubleshooting load sense always make sure the differential pressure is high enough and also if you are losing load sense pressure look at the check values in the component that works correctly. That function is working correctly because the check valves everywhere else are working.
Really thanks for your efforts
And valuable information we have got it
Thanks Zeth! Another great job!
Well done. That was a tough one 🤔🇿🇦
I remember you saying that you had to add some hy-gaurd when you first arrived. I'm wondering if the owner had been fighting a leak and was having to top it off daily. When hands doing daily service, blowing out radiators, and air filters it causes a very dirty environment for adding oil. Since you had to boost pressure, I wonder if all the hydraulic filters and screens were clean. One thing about variable piston pumps is maintaining immaculately clean fluid is vital to its longevity. If it's had dirty fluid running through it then it's efficiency could be greatly diminished. Owners and operators that are use to the older equipment prior to variable piston pumps don't understand the extreme importance of maintaining an immaculately clean system.
we have a newer dealer ship owner here that has a lot of stores that will not sell parts to other dealer ships or farmers that are not their regular custumers and it sucks when sum parts are hard to find and they wont share
Makes sense if they don’t get your business then why should you get parts from them.
Great video!
Lot of "pressure" to figure out that one. Been there a few times. But doesn't it feel good when it get figured out.
Worked on a MX270 last spring. They use a Vickers pump set up with a load sense competition valve system. Pump went into full stroke for a bit, then nothing. We had load sense pressure. Turned out to be a bad compensation valve.
Yup I’ve had them fail like that on 9030 series tractors a lot. Pump would stay at stall pressure and the engine could barely turn over
Awesome vid! Great job
Being in the automotive service profession for the last 50 years, I’m curious why you wouldn’t let your consumer drive 5+ hours instead of just having the pump assembly shipped overnight? Good job on the repair.
Thanks Zeth for the very interesting video. Im just curious how many times you said load sense in this video! Lol 😁👍
So was it the block or the standby pressure.
So, did the valve block need to be replaced? And how much do John Deere charge for it?
I was wondering the same thing….maybe just raising the pressure would have fixed it without changing the valve block
@@conebone669 still doesnt make sense why everything else works as should and head lift doesnt without tricking it... you'd think it would show inconsistencies elsewhere?
I bet deere charged a lot of money
Y es, better music! One of my ancillary jobs was to verify piping diagrams for submarine nuclear power plants before refueling overhaul. Zeth is great, it would have been great to work with him.
It's always a pleasure to watch you trouble shooting!
What an inspiration.
Zeth, I'm a bit unclear why you upped the pressure prior to trying out with the new valve block installed. Does that not leave a doubt as to where the problem actually was?
Yes that was the point of my analysis at the end. That the problem could have been the compensation valve on the pump and not having enough standby pressure.
@@ZKMasterTech understand that just wondered whether you tried the new valve first then upped the pressure even if you were leaving the new valve in place it may have helped know for the next time?
Awesome videos btw
Nice find. Nerve raking installing expensive parts when not 100% sure that’s the issue.
He’s over here working on important stuff, I’m here mad that I have to pull the front end of a 4010 out to fix a steering line
Get Deere Engineering to add this to the solutions list!🙃 you got there quickly enough. send in the "bad block" for diagnostic and/or a rebuild.
Great awesome video zeth .
do you think all the extra weight from the folding corn head had some thing to do with the block failer,on my 9760 the wisker switch for my hillco levaler stuck and cracked the aluminum hilco block it was replaced with a new cast block and my s670 hillco block has a aluminum block,go figure that one out.great job by the way.
Great diag, great video. 👍 👍
Hi Zeth
I have seen cracks in blocks also especially ones that are so full of valve , orifices. The tolerances are so tight that passages can cross over if a internal crack occurs.
Could you please tell me was that block aluminum or steel & did the valve block change not resolve the issue and the standby was the real issue, on our Drill rigs our standby on rexroth piston pumps is 30bar and it’s interesting to see this issue for future thinking also 👍
9:56 Everybody knows you beat the shit out of the valve body with a hammer FIRST.
🤭😂😂😂
Brotha you are the Man 💪
Do you ever have problems with all of the debris around all those belts and pulleys and moving parts causing friction you need to take that to the edge of the field and break out the big diesel driven air compressor and spend about a half an hour just blowing everything off and breaking out the shovel or the garden tools to rake all that stuff out of there or is that something you do at the end of the season before you put her up for the long winter
Yeah you need to blow them off everyday
I'm no farmer, but dang why didn't the owner clean it off before the technician came
Greetings Seth from Oz.
I’m currently running an aging S680 and having issues with the auger swing switch on the hydro handle. Frankly; it’s worn out. I’m told that it’s not available as a seperate part; and that the entire hydro handle needs to be replaced. Do you believe this to be the case. Regards
Yes you have to replace the whole handle.
Great video thanks
Very Kool stuff👍👍👍👍
Just wondering what brand that hydraulic gauge and display setup is?
Great informative video Zeke.....my brain now hurts lol
So did he need the valve block?
Yea! Where can I get the music?
Sometimes the mechanics best tool is Tenacity
Yes there's nothing like Knowing how the systems work on these bits of green Iron ... made more interesting with the Computer over management of all the systems . Being Qualified at the Time Computer controlled systems were being introduced i guess i was more open to how they could help and or hinder operations of the machine system's . At least some times they leave reporting of issues on screen but ... Service ability of JD iron leaves a little to be desired ... ie that Transmission issue of solenoid valve .. yes it has to be tucked away to protect from Mechanical Damage but if you can't Swap out component because of access issues it becomes a point just how much you have to dismantle to correct the fault ...
The big Question was asked when i was a Ag Engineering Student was What happens whent these Electronic System become 2nd 3rd and fourth hand do you just put them in the Crusher ... Nothing Like them olde Green and Yellow two cyclinder Poppers i thinks thats what you state side guys and girls call em lol ...
You turned a DTech Case on this one, right? 😉
I'm glad I just rent my farm...
How thick is the foam you use in the newer seats? I have a couple new machines that kick out the pto.
It’s 1” thick soft foam
@@ZKMasterTech I'll give it a try. Thanks for the reply!
Love videos
Hi Zeth, I always enjoy your videos and I have learned a lot from you, my name is Abel, I own a 9500 combine down in Mexico and some times I need assistance on some troubleshooting problems when they happen. I wonder if there is a way to get in contact with you if I need help, of course with some payment for your help.
Please let me know and how we can get in contact.
😊
What is "D.R" I know its where you check the Combine Hydraulic Pressure on the Valves, but what does "DR" actually mean Please??
Surely it should be "DT" Diagnostic Testing or "DP" Diagnostic Point, but why "DR"??
Another Ex John Deere Service Technician from the UK 🇬🇧😎
Diagnostic receptical
You would think the owner would have cleaned the machine some if he knows you will be working on it. If I were you I think I would have told him clean it up and I will fix it. Not very much fun digging around corn chaff when your working on fod sensitive valves...
On a Google 7 phone you can't read the tool part number. Don't fret, I'm not ordering one. But put the text down for the Screen Challenged. 😉
👍👍👍
Sherlock Holmes phew your the man zeth
I wonder if JD keeps track of parts such as what you changed out to determine failure rate and whether an engineering/manufacturing issue exists. Are service bulletins or recalls issued if there are multiple failures of a particular component? Is the control box you replaced serialized? Do JD engineers ever destructive-test these replaced components to determine cause of failure? I assume many parts of a combine are not built by JD and are probably made in China or Mexico - so failure of components is no doubt becoming more and more common. For want of a nail a shoe was lost. For want of a hydraulic component, a combine was lost. 2 cents
I’m not sure about older machines but with newer ones the whole JD link and being proactive instead of reactive is deeres new thing. Yeah if a part failed on a certain serial number range of machine and they see a trend. They send out alerts to the dealers and maybe the customers somehow. If not then the dealer notifies the customer that hey this part fails at 250hrs so we want to take care of that before your machine goes down. Something along those lines and I’m sure they look at the failed parts and make improvements. Something along those lines anyways
Master MF Tech
funny how a 1960 combine will still harvest , but if you dont have an engineers degree this new stuff wont work
Hehe
simple fault
Nothing is ever simple , however knowing the system and how it should work makes for an easier and quicker solving of the issue . Agspanner
@@josephcooksley3219 I say this because I myself have been a mechanical engineer for John Deere for ten years. Everything is correct, it is enough to know the principle of operation and understand the hydraulic circuits.
Thanks for sharing your knowledge Zeth 🦘👍