Crankshaft Question
Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=88042
Printed Date: 17 Feb 2025 at 3:50pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Crankshaft Question
Posted By: IL-D17
Subject: Crankshaft Question
Date Posted: 14 Apr 2014 at 3:32pm
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Is there any difference between 226 crankshafts from a by-pass filtering system and a full pressure filtering system?
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Replies:
Posted By: cotncrzy
Date Posted: 14 Apr 2014 at 4:16pm
Yes, journals are wider I believe.
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C, WD45,WD puller, 185, 200, 7060 Red Belly, 7060 Black Belly,8010, and a R52 Gleaner, AND PROUD OF THEM!
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Posted By: wi50
Date Posted: 14 Apr 2014 at 4:50pm
Early engines like the WD45 by pas system had the small main journal crank, thrust bearing in front.
The later D-17 engines all have the same crank dimensions, weather it be the earlier by pas oiling engine or the later full pressure engine. All had the large main cranks, and all those cranks have the same dimensions. Thrust bearing in the center.
There was some surface treating in the late 226 cranks. Nitride treatment. Ever notice how the center main is worn on the side opposing the throws while the side of the main journal closest to the throws isn't worn nearly as much.
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"see what happens when you have no practical experience doing something...... you end up playing with calculators and looking stupid on the internet"
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Posted By: IL-D17
Date Posted: 14 Apr 2014 at 7:38pm
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Thanks for the replies fellas! Reason I ask is I'm wanting to switch from by-pass filtering to full pressure. I've found a full pressure block and pump and was hoping I could put my current crank in the later block. Is it possible to convert a by-pass block to full pressure without much work? I've also heard the later D17 blocks are a little meatier inside than the early ones and in turn requires more grinding or machining to clearance added stroke. Is this true?
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Posted By: DrAllis
Date Posted: 14 Apr 2014 at 7:45pm
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Series 4 D-17's were the start of the "Tufftrided" crankshaft journals on the G-226 engines. Those are A-C's words, not mine, taken from page 5 of a D-17 IV brochure dated Sept-1964. The later models One-Seventy and 175 also had the same feature. 80% to 90% of the time when overhauling one of those, I never had to regrind the crankshaft at the first OH. I always installed -.001" undersized main bearings and used standard rod bearings and back together she went. If they got any maintenance at all, those crankshafts didn't wear much by time for the first overhaul.
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Posted By: patrickmull
Date Posted: 14 Apr 2014 at 9:41pm
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I am going to do it to mine it will take some machining but it can be done
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Posted By: mattb
Date Posted: 15 Apr 2014 at 8:48am
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I put a full flow oil pump in a wd45 block it worked fine just have to make sure your cam gear matches ur pump gear is where the difference is has 40psi now.
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Posted By: DrAllis
Date Posted: 15 Apr 2014 at 10:40am
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A full-flow pump doesn't give you full-flow filtering until you drill the block and plumb the different oil filter base and lines.
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Posted By: patrickmull
Date Posted: 15 Apr 2014 at 3:51pm
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you have to plug 3 holes take out the relief valve drill and tap the plug drill out and tap the hole back into the block use the new style lines and filter base
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Posted By: SteveM C/IL
Date Posted: 19 Apr 2014 at 11:27pm
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Rather easy to convert bypass to full flow.Did it to my 45 after a discussion with DrAllis as to the particulars.Simple once you understand.
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Posted By: patrickmull
Date Posted: 20 Apr 2014 at 5:38am
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I did mine yesterday it is easy to do
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Posted By: DrAllis
Date Posted: 20 Apr 2014 at 7:46am
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I did one recently on a WD-45 for myself and was able to use the threaded portion of a 12MM coarse bolt as the blocking slug (cut a slot in one end for a flat blade screwdriver). After installing it with Loctite in the vertical passage, I was able to rethread the engine block and reinstall the original oil pressure feed line connection without using any oversize pipe thread bushing.
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Posted By: patrickmull
Date Posted: 20 Apr 2014 at 9:39am
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i made a blocking slug on the lath for a tight fit and used sleeve retainer epoxy to hold it in place
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