Posted by Charles Branch on September 16, 2014 at 08:43:41 from (75.138.0.201):
In an earlier thread on grease fitting repair Dunner WI suggested that a stripped 1/4 inch fitting could be replaced by using a 7mm zerk, which is just slightly larger. I assume I would need to drill out the old hole with a 6mm bit and tap with a 7mm tap. I finally did find a source for both 7mm zerks and M7 taps at G. L. Hewett, but I'm nut sure which tap I should use. The zerks I found are described as "Straight, M7 x 1 Taper Thread." The three taps are referred to as Taper Thread, Bottom Thread, and Plug Thread.
The stripped fittings are on my Woods 1020 loader, and I can get the joints apart, so that I can get access all the way through. But the steel is very hard. (We had tried to drill one out for a 1/8 zerk, and had problems). The guy helping me is concerned that the steel might be so hard that we would have a problem getting it tapped.
I would appreciate advice on whether this is likely to work before I order the zerks and tap.
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