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Discussion Forum

Wd low oil pressure

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05-10-2003 18:35:42

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Hello: I brought a 1951wd/runs good but have not had a load on it yet/needed temp&oil pressure gauges/finally got the new gauges insatalled/oil gauge when first started went to the line below normal after runing went about half way back toward first mark/I changed oils/cln breather/replaced lubs/whre should I go from here?Thanks AL

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05-12-2003 09:30:19

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 Re: wd low oil pressure in reply to ALFRED GARNER, 05-10-2003 18:35:42  

Check your oil tube that sticks up in the filter to make sure no one has reamed out the hole, the end should be rounded with a small hole. Don't use multi-grade oils, I use 30wt year round (and it does start at 30 below). Right after you change the filter it will read lower, if you study the engine and oiling paths you'll see why.

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Bones Magoo

05-12-2003 06:42:09

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 Re: wd low oil pressure in reply to ALFRED GARNER, 05-10-2003 18:35:42  
My Wd carries very little oil pressure (needle just barely into the normal range) when it is warmed up, and has done so for as long as I can remember (20 years). Has the correct filter.

Another option you may want to consider is that Allis used Brass shims in the rod caps and main bearing caps of the crank. These shims can be removed to decrease clearance if yours are excessively worn. Use plastiguage to recheck clearance. I forget what the factory specs are, but you can find them in a book.

I've come to accept the low oil pressure as part of the "nature of the beast".

Good Luck! Enjoy that WD!

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dave K

05-11-2003 16:42:36

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 Re: wd low oil pressure in reply to ALFRED GARNER, 05-10-2003 18:35:42  
Make certain yu have the correct oil filter on it. Get from AGCO, has to have the rag stuffing, not paper. Paper does not give enough back pressure to the system. NAPA and others are not the rag filters.


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05-12-2003 06:46:19

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 Re: Re: wd low oil pressure in reply to dave K, 05-11-2003 16:42:36  
There is also a Wix filter that will work. It has the wound string instead of the paper. It also came with a dowel rod to keep the hole open for the tube to slide into. Take the dowel rod out of course.

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05-10-2003 18:52:35

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 Re: wd low oil pressure in reply to ALFRED GARNER, 05-10-2003 18:35:42  
It sounds like WD is about right if the needle rests halfway between the upper and lower lines on the gauge. The owners manual says it should be on the "O" "R" or "M" in the word normal when running wide open when hot.

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05-11-2003 17:51:52

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 Re: Re: wd low oil pressure in reply to DanD., 05-10-2003 18:52:35  
The others are right, you need the correct filter, and you need a tube in the filter base that sticks up into the filter. You only need 10 or 12 lbs of oil pressure too. Check it with a 0 to 25 or 30 lbs gauge. If it is low the cam bearings could be worn, the oil pump worn, filter wrong, or the engine just loose-worn. You can try shimming the relief valve spring to increase oil pressure, but there is no point in going over the 10 or 12 lbs AC specs. To shim take out the large plug on the side of the engine near the steering U joint, it is sort of behind the frame rail and steering shaft. Put one or two small washere under the spring in the plug. Watch oil pressure, see what you have done. Add or remove washers. I have seen a B run with no oil pressure, it was so loose that when the oil warmed up it showed nothing on the gauge. Oil was still flowing, just not much pressure. This B ran for years this way and was worked hard in this condition. And I have seen a 45 with not much oil pressure worked hard.

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