Chevyboy454
New User
Goodmorning everyone, I have dug through plenty of forums and have not read much for the issue I am having, I'm new to forums so I hope im doing this right!
Customer brought me a JD 4030 late model quad range the work I recently done on it is extensive so ill explain the best I can some stuff may be out of order so I apologize
The tractor would drive in R1 R2 A3 A4 B3 B4 C3 C4 D1 D2
The tractor does not drive in A1 A2 B1 B2 C1 C2 D3 D4
PTO would not stay on
Figured it might be mechanical failure but had to do some tests first
Absolute first was to remove the screen and change the filter, retested, no change
Checked lube pressure and system pressure as well as quad range pressure between 1-2 everything was very low and not up to spec for system pressure of 105-115psi, Did air leak tests sounded like quad range had a leak in it so informed the customer and he said we'll do the permaclutch aswell as the quad range since we'll be right there, checked out valves inside both relief housing and clutch regulating housing, pulled valves both off, found the issue with the PTO which was a broken lever, checked gaskets for breaks, resulted in nothing, new gaskets installed, new o-rings on pipes going into quad range and clutch operating housing, tested again just to see, no change
So since we were going to do the transmission pump, quad range and permaclutch ill inspect the transmission through the top plate and see what I can see since the cab was coming off, look in and find chunks of gear and taper bearing, turns out about 25ish years ago the bearings let go in the transmission and his father brought it to john deer they did the bearings and I'm assuming gears but left all the pieces in it for some reason, my boss about 10 years ago did the load control arm seals and shaft and he pulled a Ziploc bag of bearing and other garbage pieces out, fast forward to the present day and I've got a couple more pieces out so neither the customer and I were happy about how much john deer left, so I tried to deep clean the inside as best as I could getting everything out I could get, did the load control shaft again with bushings and seals since it was leaking
Transmission pump changed, pulled it out and seen the pump was scorn and upgraded to a 4040 pump (done some machining to it to get it to fit) since none for a 4030 are available at my location, split bellhousing in front of range transmission to inspect everything, top shaft syncros done and checked out everything inside the range transmission, including shift forks, made sure no snap rings were broken or gears were free spinning when they shouldn't be, quad range has been rebuilt with all new seals, packing and the pipe on the side with new hold down and bolt, throw out bearing seals done and inspected with new packing, pto and drive clutch both done on permaclutch and adjusted with the proper JD tool from the dealer as well following the steps in the IT manual, pulled both oil filter relief valve and clutch regulating valve apart and inspected and cleaned, changed pto lever inside due to being bent causing PTO to not stay on, changed springs on the clutch pressure valve and cooler relief valve, valves look good, no nicks or round edges, get it all back together and check pressures again, lube pressure is great now, flow meter to check flow for transmission pump is around 11gpm at around 1900 rpm which is a little better then it should be from reading the book, clutch pressure, pto pressure and brake pressure are around 70psi and go up with rpm but nothing extensive only a few psi, pto works and locks on as it should, I haven't put it on equipment to see if its slipping, lube reduction valve is working as when the clutch is depressed it dips in lube pressure, remote pressures are up and where they should be and hold steady, as well as brakes work, steering works, 3 point hitch goes up and down so I am only assuming the front pump works as I don't have a destroke valve on it and am unsure if I should be looking at it due to the fact the tractor still doesn't move in all the same gears/ranges like before but moves in all the other gears/ranges like before and I'm unsure if that could be the cause for this
If anyone has any ideas or suggestions please let me know as I am pulling out my hair over this tractor, thank you
I'm sure I'm forgetting information in this post but if you have any questions I will try to get back to you as quick as I can
Customer brought me a JD 4030 late model quad range the work I recently done on it is extensive so ill explain the best I can some stuff may be out of order so I apologize
The tractor would drive in R1 R2 A3 A4 B3 B4 C3 C4 D1 D2
The tractor does not drive in A1 A2 B1 B2 C1 C2 D3 D4
PTO would not stay on
Figured it might be mechanical failure but had to do some tests first
Absolute first was to remove the screen and change the filter, retested, no change
Checked lube pressure and system pressure as well as quad range pressure between 1-2 everything was very low and not up to spec for system pressure of 105-115psi, Did air leak tests sounded like quad range had a leak in it so informed the customer and he said we'll do the permaclutch aswell as the quad range since we'll be right there, checked out valves inside both relief housing and clutch regulating housing, pulled valves both off, found the issue with the PTO which was a broken lever, checked gaskets for breaks, resulted in nothing, new gaskets installed, new o-rings on pipes going into quad range and clutch operating housing, tested again just to see, no change
So since we were going to do the transmission pump, quad range and permaclutch ill inspect the transmission through the top plate and see what I can see since the cab was coming off, look in and find chunks of gear and taper bearing, turns out about 25ish years ago the bearings let go in the transmission and his father brought it to john deer they did the bearings and I'm assuming gears but left all the pieces in it for some reason, my boss about 10 years ago did the load control arm seals and shaft and he pulled a Ziploc bag of bearing and other garbage pieces out, fast forward to the present day and I've got a couple more pieces out so neither the customer and I were happy about how much john deer left, so I tried to deep clean the inside as best as I could getting everything out I could get, did the load control shaft again with bushings and seals since it was leaking
Transmission pump changed, pulled it out and seen the pump was scorn and upgraded to a 4040 pump (done some machining to it to get it to fit) since none for a 4030 are available at my location, split bellhousing in front of range transmission to inspect everything, top shaft syncros done and checked out everything inside the range transmission, including shift forks, made sure no snap rings were broken or gears were free spinning when they shouldn't be, quad range has been rebuilt with all new seals, packing and the pipe on the side with new hold down and bolt, throw out bearing seals done and inspected with new packing, pto and drive clutch both done on permaclutch and adjusted with the proper JD tool from the dealer as well following the steps in the IT manual, pulled both oil filter relief valve and clutch regulating valve apart and inspected and cleaned, changed pto lever inside due to being bent causing PTO to not stay on, changed springs on the clutch pressure valve and cooler relief valve, valves look good, no nicks or round edges, get it all back together and check pressures again, lube pressure is great now, flow meter to check flow for transmission pump is around 11gpm at around 1900 rpm which is a little better then it should be from reading the book, clutch pressure, pto pressure and brake pressure are around 70psi and go up with rpm but nothing extensive only a few psi, pto works and locks on as it should, I haven't put it on equipment to see if its slipping, lube reduction valve is working as when the clutch is depressed it dips in lube pressure, remote pressures are up and where they should be and hold steady, as well as brakes work, steering works, 3 point hitch goes up and down so I am only assuming the front pump works as I don't have a destroke valve on it and am unsure if I should be looking at it due to the fact the tractor still doesn't move in all the same gears/ranges like before but moves in all the other gears/ranges like before and I'm unsure if that could be the cause for this
If anyone has any ideas or suggestions please let me know as I am pulling out my hair over this tractor, thank you
I'm sure I'm forgetting information in this post but if you have any questions I will try to get back to you as quick as I can
