Re: 826 Hydro steering problem

Posted by Weldon on October 17, 2005 at 07:58:01 from (162.39.117.55):

In Reply to: Re: 826 Hydro steering problem posted by David Riedel on October 17, 2005 at 05:35:09:

David
On my previous post I was reading from a manual for the 06 and 56 series tractors. I now have the 826, 1026 and 66 series manual in front of me. The MCV on gear drive tractors are on the left of tractor. On Hydro tractors,they are on the right side. Their functions are the same.The pressures and flow rating of steering system are the same. They are of course, built differently and the locations of the safety relief valve are different. Your safety relief valve is located on the rear side of the MCV where the power steering return line tee is plumbed into the MCV body. Is this correct? On the under side of the MCV body is a hex head plug which removal of will allow Flow Divider valve to be removed. When you inspected the safety relief valve, you removed the return line tee, an o-ring and then the valve body. Did another o-ring and another part come out also? This part is the flow divider orifice. Manual states," Check orifice to see that it is open and clean as this orifice is the unit that actually meters the 3 gallons per minute used to operate the power steering ".
" To check operation of flow divider and orifice, proceed as follows: Remove power steering return line from MCV and connect Flow- Rater or equivalent. Start engine and check flow which should be approximately 3 gpm at 1500 rpm.
If fluid flow is not as specified, service flow divider as out lined in paragraph 57. Bleed power steering system after test is made ,if necessary."
"Service of flow divider valve consists of renewing parts. Inspect spool and bore for scratches, grooves or nicks. Spool should fit bore snuggly, yet be free enough to slide easily in bore with both spool and bore lubricated Flow divider spring has free length of 4.08 inches and should test 33.50 pounds when compressed to a length of 2.50 inches".

It should be as simple as this: If the flow divider orifice is not open allowing oil to pass through, you will not have flow to the steering system.

There are several other test you can make yourself before resorting to sending tractor to the shop. ( I like to save $$$ too )
E-mail me at weldon keiger@hotmail.com and we can communicate directly. I can send copies of pages from manual if you like.

Weldon

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