D10 D15 D17 Oil Pressure filter

W M · Sep 12, 2009

Hi All,

I'm a newbie to tractor world, working on my second AC, a D 17 Series I. My first was a D12. The D17 had no oil pressure when I got it but everything sounded fine and ran great so I figured it was the gauge. After hours of research in the archives here and some excellent advice here's what I found: The oil pressure problem was in the oil filter. The previous owner thought the wooden dowel was supposed to stay in the filter--it was still there. He owned this tractor for 20 years! Sounds like he threw away new unused filters for twenty years. I made a new steel tube from a 1/4" brake line, haven't tried it yet because everything is taped up for painting. The new tube has a little less resistance than the oem tube because it has a slightly larger id.

My question is, what happened to the filtering/lubrication process while the wooden dowell was in the filter?

Does the bypass mean that the oil was pumped though the engine and not the filter? I believe I read that only 15% of the oil was filtered.

I am using Purolator 30007 filters.

So did my engine suffer damage from not being filtered?

Thanks,
Wayne

Jeff Z. · Sep 12, 2009

Well that all depends on how much blow by there is in the cylinders to comtaminate the oil.I wouldnt worry to much about it.
Give Tony a call at Tony's Tractors. He has aftermarket tubes.

Many folks have got confused seeing the wooden dowl in the filter and figured it must be there for a reason which it is but they didn't know it was there just for shipping and storage.

steve(ill) · Sep 12, 2009

with the tube in place, 85% of the oil goes from the pump directly to the bearings, and 15% is routed thru the tube into the filter and back to sump. With the tube out, you may loose 40% of the oil due to no back pressure. I would guess if the gauge showed some pressure you are o.k., but you were loosing a lot of the pump output just back to sump. THe filter did not help much.

W M · Sep 12, 2009

Thanks for your replies.

In other words it is the filter itself that is the relief valve for the oil pressure. I read that too but I didn't grasp it till now. I can now see that without the tube, there would be no back-pressure and the oil would fall back to the sump. What kept the bearings and rocker arm, etc, lubricated for all those years. There must have been some oil going through. Am I going to have any surprises with the bearings or oil passages when it gets pressure?
I have to wire the dash before I can check this and I am waiting for a couple of gauges, I can't wait!

Anonymous-0 · Sep 12, 2009

the way steve ill . stated would be the way i would want to run . put as much to the bearings as you can.

steve(ill) · Sep 12, 2009

the output from the pump actually goes down the center of the hollow cam. There are several holes in the cam. As it rotates it sprays oil on the bottom of the pistons and it drops onto the connecting rod and main bearing caps, etc. There is a small relief at the front of the cam shaft if you get too much pressure. They normally run less than 20 psi. I now more about the B-C more, but the older D motor is similar. Again, if the gauge was reading 5-10 psi, then you should be o.k. Fix the tube and filter and go for it.

W M · Sep 13, 2009

Steve,
Thanks for explaining the flow of oil, it was just beyond me how it worked.

However, just when I thought I knew what had, I looked in the IT book and found that mine, ser# 22140 had a full flow system and there was a non-adjustable relief valve set at 30-35 lb. I would guess that the flow still goes like you said, but is there a difference in the pressure? Sounds like it might be around 30lb. Guess I got myself pretty confused now.

I really appreciate your help, this list makes us close neighbors.
Thanks,
Wayne

Anonymous-0 · Oct 9, 2009

Is there any way to find out how many D17 high arch gas series 111 were made

D10 D15 D17 Oil Pressure filter

W M

Member

Jeff Z.

Well-known Member

steve(ill)

Well-known Member

W M

Member

Anonymous-0

Well-known Member

steve(ill)

Well-known Member

W M

Member

Anonymous-0

Well-known Member

Similar threads