john deere 4430 steering issues

[lynn shaver]

We have a john deere 4430 which we have had hyd heating issues with. We had to put a clutch in it manly due to losing pressure so while having it split we pulled the quad range pack out to see if we were losing oil due to bad sealing rings. The housing was worn out with part of the lip was gone where the sealing ring was so after finding a updated hilo on ebay we rebuilt and put in thinking we had it fixed. But still losing oil in the system so we went then to the charge pump but the pressure was fine having replaced it a few years back. We adjusted the draft and no bypass through the scv valves but still no luck. So to make this story longer and to get to the point, after rebuilding the front steering piston which needed it due the the wear sleeves being heavly scored and still not fixing it we put on a rebuilt steering valve. Great we did a check and instead of getting 3 gallons a min of bleed by we only got not even a inch in a quart jar. So the problem is after about 10 mins running the bushog the steering got hard to turn both ways. Is it in the metering valve or is the steering valve froze up. Help

 

[rb46 headache]

it is probably the steering valve they are extremly finicky on anjustments and your low amount of bleed oil tells me that you may still have air in the steering system and the metering valves are probably out of adjustment. you have to have a special gage to set them and they set at .003 in. doen to .001 in depending on the valve, I would not recommend a reman part here you'd br better of with a used one that was working.

 

[Tx Jim]

Is your tractor below or above this serial number?? Serial number break will have 2 totally different steering valves.

 

[lynn shaver]

We have the later model with the valve under the hood and the small metering valve on the steering wheel. The small amount of oil was a good sign due to it not bypassing the rebuilt valve under the hood sorry i should have stated which system we had but thinks for the reply 46.

 

[Tx Jim]

It's been a long time since I was a JD dealer service manager but I don't remember any valves that need to be set with a dial indicator on the later type metering pump steering system.

 

[lynn shaver]

Thats correct there are no adjustments on the newer system. Still chopping with the tractor but as soon as we can we are going to check the check valve in the metering valve and maybe replace the whole valve since the one under the hood is new. Now not only is the steering stiff but she wants to pull alittle to the right which worrys me if a o ring in the newly rebuilt front piston is blown.

 

[Tx Jim]

Lynn
What don't you post this question on the JD forum?? There are a lot of excellent JD technicians that frequent that forum>