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Harry Ferguson Tractors Discussion Forum
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Hydralic life quit

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JerryDoyon

08-18-2006 13:32:31




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I was digging footers with a PTO driven auger and the hydralics seem to weaken and quit. The soil was full of clay and making the boring hard. At first I was able to step off the tractor and shoulder the auger up, but after a couple of those tricks the arms just dropped the auger to the ground. Did I blow the internal relief valve? The PTO continues to turn ok. Where should I look first? This is a 52 TO30.

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John (UK)

08-19-2006 07:45:15




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 Re: Hydraulic life quit in reply to JerryDoyon, 08-18-2006 13:32:31  
If it suddenly quit it wont be the safety valve, it will be a gasket that has blown. Very rarely does a relief valve give problems, it can wear due to misuse and it wont be able to lift as much and it will allow the implement to drop faster that usual when the engine is off but that is all. It could be the gaskets on the ram cylinder under the seat or the Pump base to centre housing gasket or the top cover to centre housing gasket. Remove one of the round inspection covers below the seat on the side and look inside with the lever in the lift position and the engine and PTO running and some implement on the 3 point linkage, look for any oil running from the top or a lot of oil swirling in the bottom, that will be the location of the leak. If you need some Information about looking and testing for a leak or leaks, email me at:-
fergusontractors(at)tiscali.co.uk
tell me as much as you can about it and I will send whatever Information you need to repair it.

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JerryDoyon

09-12-2006 14:11:35




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 Re: Hydraulic life quit in reply to John (UK), 08-19-2006 07:45:15  
John,
Sorry for the delay in replying, have not been able to get on line for a while, but wanted to follow up. The day after I wrote last, I went out and tried to move the tractor and everything started working fine again. So I dug the last couple postholes and returned the auger to my neighbor. However after reading through a few other hydralic problems on the forum, I am beginning to think my problem is when it gets hot from working hard. Most of the time I just use a finishing mower driven off the PTO, but recently I did some more work with my very heavy scrape blade and it seemed like it did not want to lift as high after a long period of use. And yes, I am using GL1 90 wt mineral oil. I suppose I should check for internal leaks as you have been advising others eh?

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John (UK)

09-13-2006 06:48:42




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 Re: Hydraulic life quit in reply to JerryDoyon, 09-12-2006 14:11:35  
No problem about not replying. The problem you have could be caused by a leak but it could be more likely caused by the Pump being worn or the safety valve being worn and not allowing it to reach full pressure. If you can, test the Pump pressure with a gauge it should be 2000psi. I can't remember if you told us that the hydraulics dropped on your tractor more or less straight away when you pressed the clutch pedal, they would do if there was a leak, if they hold up but don't lift too much weight it is either a worn Pump or the relief valve needs changing. Email me at:-
fergusontractors(at)tiscali.co.uk tell me what you find and I will tell you the next step and send you some service Information to do the repair.

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JerryDoyon

09-13-2006 14:04:05




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 Re: Hydraulic life quit in reply to John (UK), 09-13-2006 06:48:42  
John,
They do begin to drop after the clutch is pushed in. The hydralics were not in great shape when I bought the TO30. I followed a kerosene flushing procedure I found here and revived them, but they have never been great. I will contact you when I am ready to tear into it deeper. I am looking at some down time this winter. I also have to replace the rear main engine bearing seal as well, (leaks steady everytime I run). I think I saw a section in the service manual about installing a test gauge to check the hydralics, so I will try to do that shortly and let you know what I find. thanks again, Jerry

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John (UK)

09-15-2006 05:52:18




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 Re: Hydraulic life quit in reply to JerryDoyon, 09-13-2006 14:04:05  
If the Hydraulics drop when you press the clutch pedal then they are not reaching full pressure as there is a leak, you need to remove the left side cover and check for leaks with the lower links of the tractor prevented from rising to the top so that maximum pressure will build up,when you get max pressure it is easier to see any leaks. If you need more detailed information of what to look for, email me at:-
fergusontractors(at)tiscali.co.uk
John

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