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Farmall & IHC Tractors Discussion Forum
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Update: IH 706 No Oil Pressure

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Shawn P

11-15-2007 15:42:38




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I still can't get oil pressure in my 706 I just rebuilt the 282 motor and the oil pump I put a new oil filter in and primed the oil galleys I pulled off the tach drive to see if the oil pump was spinning and it is since I primed the oil galleys i have oil in the filter,but still no oil pressure what else could be wrong? Thanks Shawn




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Dale Barker

11-16-2007 10:17:57




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 15:42:38  
This may be a stupid question, but did you check
to determine that it is good and functioning? Oil gauges have been known to fail. Even new ones. When I take an engine apart I always
"blueprint" the oil pump. That is I disassemble the oil pump and "lap" the lid to remove any wear
marks and re-assemble with a new gasket. I always end up with unbelievable oil pressure even
at idle.

Dale

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Shawn P

11-16-2007 12:45:30




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 Re: Update: IH 706 No Oil Pressure in reply to Dale Barker, 11-16-2007 10:17:57  
Yeah I checked the gauge and its good I even pulled the gauge off just to see if any oil would squirt out from the block and no pressure there either.



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El Toro

11-17-2007 05:52:12




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-16-2007 12:45:30  
Either your pump isn't pumping any oil or your oil passages are blocked. Run a piece of wire through that fitting on your block or remove the fitting and see you can feel any blockage there.
Pull the pump and blow air through that gauge fitting as been suggested. Since you didn't pull the crankshaft the journals must not have been scored, so the the oil pump was working when the engine became stuck. Hal

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Chuck's Repair

11-16-2007 08:23:23




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 15:42:38  
It's taking you too long to locate this problem.If you don't have a pressure lube you can use an air nozzle in the oil pressure gage fitting.With the pan off and air applied to the oil pressure fitting a major internal leak will be obvious.It happened to me one time when I was working late at night and was tired and left the top half of the rear main bearing out.All the oil was dumped through that rear main journal back to sump.If their is no obvious internal leak then pull the oil pump off and remove the end plate and check to see if the drive shaft key is sheared.Also check to see if the suction tube is pluged.

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bc

11-16-2007 06:35:57




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 15:42:38  
My 2 cents and concern is that if the galleys were plugged with crud and metal filings, blowing them out into the journals and bearings could cause their seizure. I just went through a crank regrind on a vw that only ran for 30 seconds before it seized up. Unbeknown to me, the prior owner apparently ran something in it that grooved a cylinder. I found that and a grooved journal. Something was apparently in the oil. Moral of story is flush it good and change oil quickly and a couple times after an engine rebuild.

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El Toro

11-16-2007 04:45:07




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 15:42:38  
I think the oil passages are plugged with sludge or dirt. That's why we recommend having the block dipped and all oil passages blown out with air. That's a good time to have new cam bearings installed too, close tolerances on them determine good oil pressure. Pull the pan and pump and connect an air line into the oil gallery and see if you can blow air out where the pump connects.
Hal



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Brownie450

11-16-2007 03:59:28




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 15:42:38  
As JIm said--" Have you had the valve cover off & seen if oil is getting to the upper end"? Oil will take the route of least resistance, & if there is an opening in the valve area, oil won't build up pressure in the galleries until leaks are stopped. Just a thought-- are you sure that the oil pump is turning? Don't remember for sure---is there a roll pin or solid pin in the drive gear on the oil pump? Maybe pressed on--- don't remember...

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Jim J

11-15-2007 17:52:23




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 15:42:38  
I would get a pressure luber and drop the oil pan and pressurize the oil system and it will show where your leak is.



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Shawn P

11-15-2007 18:56:59




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 Re: Update: IH 706 No Oil Pressure in reply to Jim J, 11-15-2007 17:52:23  
Do you know where I could get a pressure luber from? Would napa sell it or is it a special tool? Thanks Shawn



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Jim J

11-15-2007 20:01:28




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 18:56:59  
One of the ones I have used was made one out of a freon tank. Put a pipe to the bottom and ad a fill plug with a air chuck. Use a regulator and run around 20 PSI. Hook it up to the block where the oil pressure sender goes in. I have one in my tool trailer made by Snap-on that looks like it was made out of a small beer keg.You could build one out of any kind of a tank as long as it was clean on the inside.

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Bob

11-15-2007 21:43:29




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 Garden sprayer/luber... in reply to Jim J, 11-15-2007 20:01:28  
Go to WaldoWorld, and get a $10.00 plastic pump-up garden sprayer. Cut the nozzle off of the plastic wand, and clamp a length of 5/16" rubber gas line to the remains of the wand, and the other end to a "barb" screwed into the oil gauge port. Fill it half-full of clean engine oil, and pump it up with the hand-operated air pump. When you press the lever on the wand, the oil galleries will be forced full of oil.

I'm thinking, though, that there's probably a plug left out somewhere inside the engine, that was taken out to clean the oil galleries, and forgotten, and you have a LARGE "internal leak to sump".

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Shawn P

11-15-2007 22:19:21




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 Re: Garden sprayer/luber... in reply to Bob, 11-15-2007 21:43:29  
I don't think a plug could be left out because I didn't do anything in the block. Could it be a clogged line somewhere or would the pressure from pumping the oil in clear that? Thanks, Shawn



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Shawn P

11-15-2007 17:41:05




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 15:42:38  
Yes I used the oil can to prime the oil and the pumping felt harder and some oil started to come out from underneath the oil filter housing. It has the cast iron base so I don't think the valve is bad. The pump is turning because I can see the gear on the shaft turning on the tach drive. I started the motor for about 30 seconds when I saw there was no oil pressure. Could it be a blocked oil line or is it probably somewhere in the pump? Thanks Shawn

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Janicholson

11-15-2007 18:01:17




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 17:41:05  
Where under the filter did the oil come out of ( why was it leaking there?) If the relief valve is in the filter housing I would pull it off and assure myself it was not stuck. JimN



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Shawn P

11-15-2007 18:55:39




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 Re: Update: IH 706 No Oil Pressure in reply to Janicholson, 11-15-2007 18:01:17  
It leaked out from around the O ring where the oil filter housing goes onto the base I'm not sure why it would leak out there. Tomorrow i'll pull off the housing and check out the valve to make sure. Thanks Shawn



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Janicholson

11-15-2007 17:18:36




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 15:42:38  
If you primed it the way I suggested (with an oil can) did there come a time that it felt different, the pumping got harder, or changed?
If not, there is no telling where the pressure is going.
I would pull the oil pan and valve cover. With these off, I would use the priming system you used to put oil in the system to put more oil in the gallery. (a helper might be needed) Watch the crankshaft and cam from under neath, and the passages where oil might be found.
Look also at the head/valves to see if there is a hemorrhage there. An oil gallery plug or a core or drill plug left out from the cleaning process can do the deed. Looking at it will find it. JimN

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ChrisAS

11-15-2007 16:27:58




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 15:42:38  
I don't remember about the d282 but the later 263's and 291 gas had an aluminum oil filter base and the first aluminum bases did not have the best valve in them and would cause oil pressure problems as you have. If your base is aluminum check the pressure valves. If you have a cast iron base the velve is much better.



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K.B.-826

11-15-2007 16:02:56




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 15:42:38  
Try a different guage? About the only other possibilty at this point is a problem with the oil cooler bypass valve or the pressure regulating valve, both loacted in the filter base. Maybe a blown gasket between the block and filter base. Sure you got the pump together right? Possible that the gear inside is spinning on the shaft. Pull the pump back out, stick it in a pail of oil and turn it by hand to verify that it pumps. Have you actually started the engine, or are you just cranking and trying to build pressure?

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the tractor vet

11-15-2007 15:58:07




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 Re: Update: IH 706 No Oil Pressure in reply to Shawn P, 11-15-2007 15:42:38  
Here agin i did not do the work and rally no idea here . What are clearances on the bearings . And if you are tryen to get pressure up off the starter that may not happen . This is why i use engine assmy. lube when rebuiding and the engine can run for a short time with OUT OIL PRESSURE . aLSO I USE A KNOWEN good TEST GAUGE IN THE GALLEY . And one other thing with these old tractors I never do and in frame It comes out and all the way down and EVERYTHING is checked and ALL bearings replaced . Crank turned cam checked . But myself i can not afford a screw up.

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jd440

11-15-2007 17:49:21




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 Re: Update: IH 706 No Oil Pressure in reply to the tractor vet, 11-15-2007 15:58:07  
tractor vet- I always do the inframe rebuilds if the crank checks out okay,not always a need for wasting money on things that dont need to be replaced,he knows he can only run the engine for a short time,that is why he is tryin to fix the problem. Shawn,sorry I cant think of anything to try and help you right now,



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the tractor vet

11-15-2007 18:28:12




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 Re: Update: IH 706 No Oil Pressure in reply to jd440, 11-15-2007 17:49:21  
The main reason for and out of chassie is for having the block checked and new cam bearings along with checking line bore decking of the block and recutting of counter bore . When a tracor or anyother ind. engine has had more then two inchassies then it is time for and out of chassie . Also when the customer is paying the bill he sure as heck does not want to have to bring it back and then YOU FOOT THE bill. And with these old engines they do warp . Maybe i am to fussy BUT I HAVE NEVER LOT AND ENGINE FROM MY MISTAKE. And it only costs a dollar more to go first class.

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jd440

11-15-2007 18:48:40




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 Re: Update: IH 706 No Oil Pressure in reply to the tractor vet, 11-15-2007 18:28:12  
tractor vet- I totally agree with you,sorry for jumpin on you the first time.



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