Farm Equipment - wd45 full flow oil conversion question

Print Page | Close Window

wd45 full flow oil conversion question

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=170874
Printed Date: 12 Oct 2025 at 6:26pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: wd45 full flow oil conversion question

Posted By: Reallyrusty
Subject: wd45 full flow oil conversion question
Date Posted: 06 May 2020 at 6:26pm

I recently acquired a 55 wd45. It was free including the 2 and a half gallons of water i drained from the engine sump. I am in the process of a complete overhaul and have converted to the d17 oil pump (internal regulator) with all the plumbing changes. I am not concerned with originality as it will be a working unit.

My question is i have a generic oil filter mount that i would like to use for the oil filter. Can i simply "Tee" into the 3/8" oil supply line with a 3/16" line for the head and governor?

Will there be too much flow to the head and governor or drop the pressure too much?

I don't have ( or seen) the correct D17 filter mount so i am not sure if it meters or restricts the flow.

Sorry for the newbie question.

Replies:

Posted By: SteveM C/IL
Date Posted: 07 May 2020 at 8:50am

Original 17 base doesn't meter the little line and your 17 pump will supply plenty of oil. Assuming you drilled the block and blocked the "in" and "out " passages from each other and have the matching distributor gear,your home made filter idea should work. I'd get the base and lines for a full flow 17 from bone yard but that's me. (what I did). You will need to reshape a line to fit in a 45 and miss the steering.

Posted By: Reallyrusty
Date Posted: 07 May 2020 at 2:04pm

thank you!

Posted By: SteveM C/IL
Date Posted: 07 May 2020 at 11:48pm

I got to thinking...the fitting in the base for the little line may have a small orifice. I never paid much attention as it came from a 17 and knew that it would work. I'm not going to pull mine apart to see,sorry. A 1/16th in hole would be plenty I would think. I don't know if there is a problem flooding the head through the rocker shaft? Dr Allis would know about the fitting.

Posted By: Ed (Ont)
Date Posted: 08 May 2020 at 8:33am

There is a whole thread on this in the knowledge section. Take a look at that - it seems to have everything covered. Have never done it myself so don't know for sure. I'm sure others that have can tell you if you need anything else.

Posted By: Reallyrusty
Date Posted: 08 May 2020 at 10:27am

I have studied the knowledge section pretty well but i have not seen that one detail. I guess it would be mute if I had the correct filter base. I just figured they must have designed in how much oil they wanted to go up top and the d17 pump is going to change that.

Posted By: Bill_MN
Date Posted: 08 May 2020 at 12:47pm

I don't think it matters much how much oil gets to the head, it just has to be a constant trickle as it gets distributed evenly to all the rockers. The fitting is the same size as the I.D. of the line itself which is 1/8 tubing, not sure on the wall thickness though. Get the correct filter base and lines if at all possible, it will just be that much less hassle.

-------------
1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow

Posted By: SteveM C/IL
Date Posted: 08 May 2020 at 1:43pm

I advise plugging drain back hole in block from bypass filter...more sure fire than counting on a gasket .

Posted By: Reallyrusty
Date Posted: 08 May 2020 at 1:48pm

that has been done along with all the other block plumbing changes that were shown in the knowledge base. the only deviation that i have is the filter mount.