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Farmall & IHC Tractors Discussion Board

Re: 674 After Hydraulic filter change, no pressure


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Posted by JimB2 on October 05, 2008 at 16:58:39 from (99.241.179.24):

In Reply to: 674 After Hydraulic filter change, no pressure posted by hrhoward on October 05, 2008 at 16:19:01:

Hi, below is suggestion from Bernard who was a CaseIH mechanic:
Capacity is 9 gal and over fill by another 3 to 5 will not damage anything.
Make sure the filter is toward the MCV valve and the stainer is in the cover.
The best way to bleed the hydraulic system is to loosen the pipe below the hydraulic filter, place a clean bucket under to catch hydraulic fluid and run the engine until hydraulic fluid comes out.

The light on the dash indicates low pressure on the transmission lube pump. Could be a faulty sensor under the seat or low hydraulic fluid level. The newer models have eliminated this sensor.
Hard to steer can indicated the MCV priority valve is sticking. Sometimes dirt can cause the valve to stick and sometimes by activating the remote control lever until you hear the hydraulic relief valve squeal will dislodge the dirt.
If the remotes and 3 pt work good then most likely the problem is a sticking flow divider in the MCV valve. If 3pt and remotes are weak also then could be weak pump. The flower divider takes the 12 GPM output of the hydraulic pump and splits it into 3 GPM for PS, PB and oil cooler and 9 GPM for 3pt and remotes.

Hope this helps
JimB


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