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Farmall & IHC Tractors Discussion Forum

IHC 574

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Gene Chernault

09-03-2005 16:56:41

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Could someone tell me what the trns.hyd pressure should be at hi and low RPM on a 574 diesel.Thank you.

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Jb2

09-03-2005 18:43:13

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Re: IHC 574 in reply to Gene Chernault, 09-03-2005 16:56:41

Hi Gene, are you asking about the pressure sensed by the sensor under the seat that turns on the transmission warning light on the dash?

I looked in the I&T shop manual for 684 which is same rear end as 574 and the only pressures it mentions are the hydraulic pressure for main pump is 12.5 gpm @ 1500-1600 psi, relief valve should limit to 2300 to 2500 psi. Pressure to PTO clutch should be set to 220 to 250 psi.
Power steering is supplied by flow divider @ 2.5 gpm and 1500 to 1600 psi.

There is a separate lube pump that supplies 4.5 gpm to lube the transmission and I believe this is the one that the pressure switch under the seat measures. The shop manual mentions this lube pump and says there is no way to check the flow as all oil passages are internal to the transmission. I do seem to recall that the switch under the seat had something like 10 PSI stamped on it.

Maybe Bernard le mecano will assist you as he has worked on many of these tractors for IH dealer.

Hope this helps
JB2

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Gene Chernault

09-04-2005 05:38:28

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Re: IHC 574 in reply to Jb2, 09-03-2005 18:43:13

Thank you JB2. I was talking about the sensor under the seat. I was bushogging yesterday and sensor light started blinking. I checked the pressure once before but cant remember what its supose to be Thanks. Gene Chernault

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Harold Hubbard

09-04-2005 06:24:02

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Re: IHC 574 in reply to Gene Chernault, 09-04-2005 05:38:28

If any idiot light starts blinking at me the first thing I do is check all its wiring and connections, especially if I am doing a rough and high vibration job like brushhogging. In my limited experience with the 574, (a friend has one that I use occaisionally) the dash lights are prone to all sorts of difficulties, from bad bulbs to falling out of their mounts to random disconnections. In my case it may be due to a long history of abuse and poor maintainence, but it is still a good place to start.

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kj(SE IL)

09-04-2005 08:23:42

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Re: IHC 574 in reply to Harold Hubbard, 09-04-2005 06:24:02

we have a 574 gas at work that mows several acres with a 6 ft model 306 bushog. the dash light frequently flashes on it , have had it in shop in the past and have never had the cause resolved. won't come on for a while then starts it again. seems to be at it's worst when mowing levees or in very high grass and weeds when you're really loading it down.kj

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