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630 POWER STEERING

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JEFFFROMIN

04-28-2003 20:25:09

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I REBUILT THE FRONT PEDESTAL ON MY 630. THE WHEELS TURN EASY TO THE LEFT NOT SO EASY TO THE RIGHT. THE MANUAL CALLS FOR A SPECIAL ADAPTER TO SCREW IN A PRESSURE GAUGE. I DO NOT HAVE THIS ADAPTER SO I PUT A PRESSURE GAUGE IN BETWEEN THE STEERING VALVE AND HOSE.(DOES ANYONE KNOW IF THAT MAKES A DIFFERENCE.) STEERING TURNED ALL THE WAY TO THE LEFT I GET 500 PSI, ALL THE WAY TO THE RIGHT I GET 300 PSI. THE BOOK SAYS IT SHOULD BE AROUND 1100. I ADDED WASHERS TO THE RELIEF VALVE AS THE BOOK SAYS - NO DIFFERENCE. I TOOK ALMOST ALL THE WASHERS OUT - NO DIFFERENCE.I HAVE A FLOW OF ABOUT 150 PSI.
ANY HELP IS GREATLY APPRECIATED.
THANK YOU
JEFF

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Clooney

04-29-2003 03:38:19

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Re: 630 POWER STEERING in reply to JEFFFROMIN, 04-28-2003 20:25:09

JEFFFROMIN, installing the pressure valve where you did shouldn't make any difference. You might try removing the valve stop screw [where the manual said to install the adapter] & install a shorter screw [maybe 5/16"X3/8" with a washer under the bolt head]. I don't think it would matter but that called for adapter doesn't act as valve stop like the original stop screw does.
~Your pressures do seem mighty low [if it can move the wheels on a hard surface I would think the pressure readings are incorrect].
~Try installing a shut-off valve between the gage & steering gear. If you close that valve & the pressures are still low, you either have a bad gage or the pump isn't getting the job done. If you close that valve & the pressure comes up to over 1000# you have internal leakage in the steering control valve or the vanes are still leaking in the pedestal.
~If the pump pressure tests over 1000# you might want to do a vane leakage test [it�s in the manual]. ~It would probably be a good idea to verify the gage accuracy before basing anything on the gage readings�
~If the steering works good now & all you are worried about is that dissimilar steering effort, don�t try to adjust it with a gage...Put the front wheels on a high traction area & just bump that valve [fore & aft] VERY SLIGHTLY until it takes the same effort to turn the steering wheel in both directions.

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JEFFFROMIN

04-29-2003 20:07:39

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Re: Re: 630 POWER STEERING in reply to Clooney , 04-29-2003 03:38:19

CLOONEY,

THANKS for your help. I rebuilt the vanes and the cylinder looked good - I hope that is not it. I'll check the gauge. It turns fine to the left, maybe the spool is off. I used the gauge w/the front end off the ground - will try the other way. Hope to get it soon, gotta get crops in. Will post back. Thank you again.
Jeff

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