3 bolt wide front.
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=159274
Printed Date: 04 Nov 2025 at 7:32am
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Topic: 3 bolt wide front.
Posted By: savedallis1953
Subject: 3 bolt wide front.
Date Posted: 22 Mar 2019 at 6:02pm
First off you gentlemen are great. Thank you for knowledge abundant. I have a 3 bolt wide front and at least one bolt is stripped out. My question is 'is it worth or acceptable practice to drill the bolt holes deeper' and can any internal damage be done by doing so.
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1953 WD, 1953 WD, WD engine with WD-45 crankshaft.
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Replies:
Posted By: nevans
Date Posted: 22 Mar 2019 at 8:09pm
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Have to be careful about drilling in futher can go yo far and get in to oil or grease area I know this will cause problems but maybe helical coils or metric threads just and idea
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Posted By: Michael V (NM)
Date Posted: 22 Mar 2019 at 10:26pm
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I have one that's drilled and tapped to next larger size..3/4" I think...only on the lower 2 tho...
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Posted By: savedallis1953
Date Posted: 23 Mar 2019 at 5:09am
Thanks for the information. I now leaning towards 3/4" bolts.
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1953 WD, 1953 WD, WD engine with WD-45 crankshaft.
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Posted By: CTuckerNWIL
Date Posted: 23 Mar 2019 at 11:28am
I don't see any reason why you couldn't go all the way thru the casting and tap to the original size. Just so long as the bolt doesn't go far enough to interfere with the moving parts inside.
A liberal coating of loctite on the bolt when assembling would seal up anything that anted to leak out, or loctite a stud in place and put a nut on the outside.
Any threaded hole should be at least one and a half times deeper than the bolt size.
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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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Posted By: savedallis1953
Date Posted: 23 Mar 2019 at 5:24pm
even better Idea! W have a shortage of Allis Chalmers here in Florida so the pickings are slim which leads to worn out ones, almost exclusively, if you can locate them at all hence the grinding, drilling, tapping, welding, crying, finger smashing etc. Still love the w series!
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1953 WD, 1953 WD, WD engine with WD-45 crankshaft.
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Posted By: Dave (Mid-MI)
Date Posted: 23 Mar 2019 at 5:37pm
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Drill it out and install a Helicoil insert in the original thread size. You will have stainless steel threads that are much stronger than the cast iron originals.
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Posted By: Michael V (NM)
Date Posted: 23 Mar 2019 at 8:42pm
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Previous owner had put the 3/4 bolts in the one that I have, its the only one of three that's been messed with. I would have done the heli-coil as Dave said...has been claimed that heli-coil is stronger than the original
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