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Farmall & IHC Tractors Discussion Forum
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Petcock Question

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Orion

03-13-2005 16:59:18




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When checking my oil on an M, when I open the bottom petcock, should the oil run out quickly in a steady stream? I notice that when I open it, it takes about 10 seconds and then starts dripping slowly. It basically is just a drip instead of a stream..... .Thanks Much




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riverbend

03-13-2005 18:22:54




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 Re: Petcock Question in reply to Orion, 03-13-2005 16:59:18  
One of the petcocks on my H has had the handle rewelded. It does not open as far as the other one, so it takes longer for the oil to drip out. Also, if the hole is facing up, you might have a bunch of weed seeds in there.



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Paul in Mich

03-13-2005 17:50:14




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 Re: Petcock Question in reply to Orion, 03-13-2005 16:59:18  
Orion, Your oil level should be such that it drips out of the bottom drain cock. Optimum level is somewhere between the bottom cock and the top cock. If oil runs out of the top cock, let it drain until it stops. Those old tractors are rather fussy about having too much oil in them. When they ran on kerosene or distilate, a certain amount of unburned fuel would seep into the oil pan. Since the kerosene or distialate would settle to the top, it was standard operating proceedure to first open the top drain cock in the morning and drain any kerosene or distilate fuel from the crankcase. That is the reason IH installed the 2 drain cock system rather than a dip stick. If your oil level is less than the bottom cock, then you add oil until it drips out of that cock, not necessarily the top.

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CNKS

03-13-2005 18:04:13




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 Re: Petcock Question in reply to Paul in Mich, 03-13-2005 17:50:14  
Only problem with using the bottom petcock is that it is sort of like the add oil mark on a dipstick. If the tractor uses any oil, chances are if you are running it hard, it will drop below the bottom petcock before you are done. I have run tractors that needed to be overhauled and added oil in the morning and noon. If I had used the bottom petcock, chances are I would have had to overhaul sooner because of lack of oil. That's why I say to add slowly until it runs out the top one. With distillate/kerosene, the procedure was to open the BOTTOM petcock and drain until it stopped, the add oil until it ran out the top petcock. I don't know how low you can let it get, don't want to find out.

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CNKS

03-13-2005 17:19:06




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 Re: Petcock Question in reply to Orion, 03-13-2005 16:59:18  
It sometimes takes a while -- but I fill mine to the top petcock. If you only get a slow drip from the bottom one, you should add some oil. I don't think I have even opened the bottom one on any of my tractors. I just add a little at a time until it drips out the top one.



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Andy Martin

03-14-2005 05:26:50




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 Re: Petcock Question in reply to CNKS, 03-13-2005 17:19:06  
Different people operate different ways!

I hardly ever open the top petcocks.

If I'm still getting oil out the bottom one I go to the field. There is plenty of oil sump capacity on an H or M and a quart below the lower petcock is still plenty of oil to work hard with.

On bad days I have come home and had to put two quarts in to get it to show at the bottom. No loss of oil pressure and no engine damage.

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CNKS

03-14-2005 06:39:48




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 Re: Petcock Question in reply to Andy Martin, 03-14-2005 05:26:50  
Whatever works for you, the manual says not to run it below the bottom petcock. Again, the problem is if it uses oil, and is getting worse, you don't know how much remains until you refill it. I had a car once that used a quart of oil every 700-1000 miles from day one. I knew when it was a quart low because the oil light came on under hard braking. Of course the H or M doesn't nose dive much when you brake. My folks had another one that wolfed down a quart in the first few hundred miles and then didn't use any more. We ran it that way, then the engine finally quit 20 miles from home one day -- but, it had run 9 years before that. I imagine a quart below the lower petcock is still safe, I simply don't want to run it that way. The manufacturer probably builds in safety factors to allow some margin of error.

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Ronald

03-13-2005 18:22:37




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 Re: Petcock Question in reply to CNKS, 03-13-2005 17:19:06  
I agree with CNKS. That was what the owners manual say's to do when you are running kerosene. I always fill mine to the top pitcock and have never had any trouble.



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