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Allis Chalmers Discussion Forum
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No oil pressure on WC

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Keith

01-31-2004 11:50:12




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We recently rebuilt the motor on my dads 1937 WC. We do not have any oil pressure and want to see if any one can help us. We put the motor in and it didn't have oil pressure but it did have an oil leak. We found out that the freeze plug (I am not sure what the real name is for this thing) that covers the end of the camshaft inside the bell housing was missing. We pulled the motor back out and put this in. While the motor was out, we replaced the oil pump and made sure all of the lines were clean. We have narrowed the problem down to what the I&T manual calls an "oil releif valve". This is on the right side of the block. It says that pressure can be varied by adding or removing shims. I am not sure what we need to do here. Can anyone give some advice? Could this be preventing the engine from building oil pressure?

Thanks,
Keith

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Dave K

02-01-2004 10:06:45




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 Re: No oil pressure on WC in reply to Keith, 01-31-2004 11:50:12  
Get a filter from AGCO, not NAPA. It needs to be the rag stuffed one with a wooden stick (you remove that) up the center. Be certain the metel pipe in the center of the base, where the filter screws on is there and goes up through the center hole in the filter. 10 pounds at the gage is about right.

Dave



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wdTom

01-31-2004 19:06:42




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 Re: No oil pressure on WC in reply to Keith, 01-31-2004 11:50:12  
Yes, check the filter!! Disconnect an oil line and see if oil is comming out. The relief valve could be a problem. It consists of a small piston, about 1/2" in dia., a spring, and a cap. If the piston is stuck open, the spring broken or weak it will not build up pressure. Take the large plug off and remove the srping, and piston. You may need to fiddle around to get the piston out. Try pushing in on the piston and seeif oil pressure comes up.

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Floyd Phillips

01-31-2004 18:54:24




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 Re: No oil pressure on WC in reply to Keith, 01-31-2004 11:50:12  
Seen your ad about your oil presure prob. I have A 1947 AC my on self. My tractor has 10lbs.oil pres. I also asked about it. Hear's my answer an old man once told me that the ac never carried a high presure. I've been running my ac since 1996. That when i overhaul the engein. Have a good time. sincerley Floyd Phillips



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Larry

01-31-2004 16:12:35




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 Re: No oil pressure on WC in reply to Keith, 01-31-2004 11:50:12  
Make sure you have the correct oil filter. NAPA filters cause low oil pressure.



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JMS/MN

01-31-2004 15:39:49




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 Re: No oil pressure on WC in reply to Keith, 01-31-2004 11:50:12  
Have you run the engine for at least several minutes and noticed no pressure? Probably just does not register on the gauge- otherwise the engine would be seized up already. If you put on a new oil filter- is the oil tube still in the base casting, going up into the filter. Heard that some filters also prevent the gauge from registering. Some people like to prime the oil system- I've never found this to be necessary, but it wouldn't hurt to try. The I&T manual should describe how to handle the pressure setting with the cap on the right side of the engine.

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old

01-31-2004 12:56:30




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 Re: No oil pressure on WC in reply to Keith, 01-31-2004 11:50:12  
Yes the relief valve could be the problem if its stuck open or has a bad spring in it but as far as how to fix it sorry I don't know



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Keith

02-01-2004 04:35:50




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 Re: Re: No oil pressure on WC in reply to old, 01-31-2004 12:56:30  
Thanks a lot guys. We took the guage off of my farmll and it started working. I guess that the new guage was a dud. We will get a new guage as well as the new filter. it does have a NAPA filter on it now.

Thanks,
Keith



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norm

02-01-2004 18:01:38




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 Re: Re: Re: No oil pressure on WC in reply to Keith, 02-01-2004 04:35:50  
get a new gauge and get the napa filter off 1101 no good --say 1104 is o.k.--call1-800-254-3116 -for new gauge with a-c name



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