4010 with really noisy hydraulic pump

You guys might remember a while back I posted about my son buying a 4010 with a rod through the side. Well we fixed the motor and it is running great but the hydraulic pump is really noisy and almost has a knock. The 3 point arms are real jumpy when going up but while they raising the pump quits making the noise. The steering and brakes work fine and they don't stop the pump when activating them. We had this tractor split so do we need to bleed the pump somehow? Sometimes when you shut the motor off it sounds like the hydraulic pump squeaks. Anybody have any ideas? I'm not to goog with these john deere hydraulic systems.
 
Start with the pump coupler. There are four rubber bushings that probably need replacing. Also check to make sure the yoke attached to the pump shaft is tight (there is a bolt to squish it tight on the
spines). Many, many times, this is the problem. Good luck.
 

This tractor has the original 2 steel disks for the drive. It doesn't have any rubber and the coupler is tight on the pump shaft. I believe this is more of a chatter in the pump or a valve or something making the pump chatter.
 
The original disc drive was noisy as well,that is why most 10 series tractors have been changed over to the 20 series style coupler. Tom
 
Put a guage that goes to 2500psi or more on a Deere hyd. tip and plug it into the rear hyd outlet. When you move your lever it will give a pressure reading. On a 4010 anything over 1800 psi is probably ok, book calls for like 2250 if I remember right. If you are planning on keeping this tractor spend the money for a Deere service manual. Check Ebay as they are usually there for lots less than Deere. Tom
 
Right now there is a John Deere service manual on EBay in the original binder for $80.95. It is the first manual that was printed in 1960 and says 4000 series tractors. This book has lots of info that the later books do not have. It was printed when the service people had never worked on anything but a two-cylinder tractors so it gives every step. I have one of these and the newer ones as well but use this one the most. Tom
 
Tom are you meaning the SM-2042???? I have the "new" manual SM-2039 and it does not cover things in as good of details as the earlier one.
 
Thanks guys for all the help. We are going to get a better manual. We do have the I T Manual. We do want to get this fixed soon because he wants to pull it at the tractor pulls. We have been working pretty hard on the engine to get it running for the first tractor pull. Now my son is a little bummed with the hydraulic problem.

The steering and brakes work fine. The 3 point was a little jumpy when raising when we first got the tractor running but we just assumed it was air since we had all the lines unhooked to remove the engine. The hydraulic was noisy at first but it seems the more we run it, the louder it gets. It makes no noise while the 3 point arms are going up but as soon as they stop raising the noise comes back. We checked the screen in the transmission and it was completely clean. The filter was also clean. We cranked the engine while the filter housing was off and it flowed a good amount of oil while cranking. We took the drive coupler off the pump and the splines are fine. When we start the motor without the drive on the pump the noise is gone so it is definitely in the hydraulic pump.

I have read that the stroke control valve in the front pump could be acting up. I have also read that turning in the destroking screw could clear the stroke control valve and possibly help it out. I see pictures of this screw on the jdparts website but it shows it on the top of the pump. This tractor has a screw on the bottom. It just looks like a stem sticking down and has a roll pin through it for a handle. Does this sound right for the destroking screw. I don't want to turn something that I should not. I have also read that you need to time the pump to the motor. Is there anything to this or just bs. This motor that we built does have higher than normal compression (23:1) and could possibly be transferring some kind of compression pulse to the hydraulic pump that it was not used to. Maybe the newer rubber mounted drive would help with this.

I am going to get a fitting to go in the remote outlet to check the pressure. Everything we have is pioneer so we don't have anything to fit the jd outlet.
 
(quoted from post at 07:37:16 05/16/16)

I have read that the stroke control valve in the front pump could be acting up. This tractor has a screw on the bottom. It just looks like a stem sticking down and has a roll pin through it for a handle. Does this sound right for the destroking screw.

NO I've never seen a DS screw on the bottom.
 
(quoted from post at 13:27:58 05/16/16)
(quoted from post at 07:37:16 05/16/16)

I have read that the stroke control valve in the front pump could be acting up. This tractor has a screw on the bottom. It just looks like a stem sticking down and has a roll pin through it for a handle. Does this sound right for the destroking screw.

NO I've never seen a DS screw on the bottom.

This is a real early model tractor if that matters. Also is it possible that someone could have put the stroke control housing on upside down. This screw looks just the destroking screw on the jdparts website.
 
I am not sure which number as mine is missing the cover(and it is in the shop) but it is dated 1960. It does give lots of small details that the latter one does not have. Tom
 
Check those flex plates in the pump drive for cracks. They are noisy when they crack.
 
The early pumps have a different cover on them. The pressure adjustment is top instead of
the bottom and uses a screwdriver instead of an allen wrench.
 
(quoted from post at 09:14:44 05/16/16) The early pumps have a different cover on them. The pressure adjustment is top instead of
the bottom and uses a screwdriver instead of an allen wrench.

I don't remember that but thanks for correcting my mistake.
 
If it was mine i would replace the pump with one out of a 4020 as they were a better pump and had the seal drain back to the trans. the early pumps on the 3010 and 4010s were a shorter stroked




and were noiser
 

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