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JD 530 Power Steering Problem

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Ellis

10-18-2002 21:03:20




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I have a 530 wide front with power steering that gives a locking effect whenever you start to turn the steering wheel in either direction. Once the wheel is moving the steering works okay and free, but any time you stop the steering wheel action it seems to stick momentarily and then freely moves again. Would appreciate any ideas or help before I dismantle. I do have the JD Power Steering service manual.

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Ellis

10-20-2002 20:24:29




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 Re: JD 530 Power Steering Problem in reply to Ellis, 10-18-2002 21:03:20  
Thanks Clooney and ChuckW. At this point I wanted to try and ensure I could pin point the problem. We are doing a total restoration on the tractor both mechanical and body so we will be going into the pump, steering valve assembly, and steering cylinder/vanes. It's better to know what problem to look for then tie into something like this and ending up with similar results after repair.
Again thanks and as I get into the assembly I am sure I will be in contact

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Clooney

10-19-2002 05:55:43




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 Re: JD 530 Power Steering Problem in reply to Ellis, 10-18-2002 21:03:20  
Ellis, there are a few things that can cause sticking steering in the later Deere steering systems. Anything from a worn helix or helix slot to low pump pressure to worn bearings to worn cam to leaking vanes. I presume you have already check the P/S oil level? ~Start by doing a vane leakage test & system pressure test [it's in your book], if that passes then move on to a bearing adjustment & helix end play adjustment [you will need a dial indicator for some adjustments & a 2,000# pressure gauge for the pressure test ]. After the above adjustments you should re-center the steering valve & re-set the flow control. If it still doesn't function correctly then you will have to disassemble the steering worm/actuating sleeve & check the parts for wear then re-set the cam spring tension.
~Now for what you have been looking for: I have found that in some cases increasing the flow control flow setting will allow a hanging steering system to operate properly, if the helix is sticking due to wear,or the cam isn't working smoothly or the pressure is low, more system oil flow will allow the wheels to turn slightly before the lock-up occurs. If you are experiencing lock up on pavement or high traction areas & it works better while moving or on gravel, an increase in flow control can help. [this isn't an actual repair it is more of a cover up remedy]. Keeping the front tires at or near maximum recommended pressure will also help.....

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ChuckW

10-19-2002 05:20:41




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 Re: JD 530 Power Steering Problem in reply to Ellis, 10-18-2002 21:03:20  
I have written on several posts about this very problem. Over the past few years, have straightened out several of these units. I have found the only way to do this without a hit or miss/chase the problem around is to do as follows.

1. remove the upper complete unit/worm and control.
2. loosen the gear and then remove the upper housing. This requires a small hoist or probably some help as is heavy and awkard.
3. Check the vane pins for damage and replace the vane wiper gaskets. Also renew the oil rings in the housing and insert the gaskets per guide.
4. be careful with finger when installing the housing and also rotate the upper gear 180 degrees. You have to put the gear in as the housing is close to seating. Be sure to put the same amount of shims under the gear.
5. Now you know the problem is not in the motor or control.
6. Reinstall the unit and be sure you have proper clearance by adding gaskets. Also you can adjust the bearing worm end play at the front of the control unit. 7. So as not to get hurt, jack up the front of the tractor. Add the proper amount of fluid. Loosen the control unit but snug it up slightly.
8. Pull the spark plugs, relieveing compressing, now crank the engine and see if unit is centered and or tap the control valve to see if you can center. Once centered, install plugs and start the engine. Check the PS action. If there is unequal action in the control valve you will have to take the control valve off and check the internal pins. These can be knocked out and reversed. then reinstall.
9. this is my best advise. Thought would be a simple fix/probably not hardly as problem has been a long time brewing.
10. Hope this helps you and you can advise of any other questions.

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