[AT] Ferguson to30 cracked block

[Larry & Barb Dotson]

John
There is a system called "Lock Stitch" that uses a reverse pitch thread that 
when screwed into a crack. will pull the two halves together. A series of 
drilled and tapped (special tap) holes are then filled with a special 
shouldered reverse pitch screw which is designed to break off when fully 
tightened leaving a slight rise than can be ground down even with the 
original surface. Once the surface is back to normal, a needle scaler is 
used to resemble the rough casting of an engine block. This system is used 
on some very large and expensive engines such as large ships where a new 
engine may cost in the millions. You should be able to Google for the 
source.
Larry Dotson


----- Original Message ----- 
From: "John Hall" <jthall at worldnet.att.net>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Wednesday, April 02, 2008 9:53 PM
Subject: [AT] Ferguson to30 cracked block


> Pulled down a TO30 for a friend and found the block cracked between #3 and
> 4 on teh lower end. Is there any sort of daring repair on these blocks or 
> is
> it time to junk it? I have heard of one adventerous sole drilling between
> the cylinders and pulling the block back together with a threaded rod. Any
> ideas short of a salvage yard?
>
> John
>
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