Rethreading hole for grease fitting?

[mark.r]

One of the grease fittings on my mower got knocked out this weekend. The good news thing is that it did not break off in the hole so the hole is clear. The bad news is that the first couple threads look to have been "disturbed" so I have not been able to insert a new fitting. Is the best (or only) way to fix this is to us a tap and dye re-thread the hole to 6 or 8 mm (can't remember which it is). I have never used a dye set but I can imagine I can make my way through it if it is the right way to fix the problem.

Thanks,

Mark

 

[JerryG]

They make a four-way tool for just what you are needing to do. Most places that sell patches and valves have them. I don't remember if I have seen a metric one or not, but I'm sure they have them as well.

 

[mark.r]

They make a four-way tool for just what you are needing to do. Most places that sell patches and valves have them. I don't remember if I have seen a metric one or not, but I'm sure they have them as well.

Thanks Jerry. So that I am clear, this four way tool is a specialty item made just for grease fittings or is a more universal tool for rethreading all types of threads? You wouldn't happen to know what it's called would you?

Thanks for the heads up.

 

[mark.r]

Yes, pretty frustrating to not be able to find one of these tools for metric sizes. I guess I will have to by a small tap and die set and go that route, hoping that the set has the appropriate taps. I guess I could go the "press" fitting route since it is for a low pressue application.

 

[mechanic]

I do this quite often fixing threads. I always take my guage tool and check the threads on the piece I want to thread in make sure I have the right tap. Several years ago I bought a tap and die set and use it quite often. You can not go wrong if you check your threaded piece first then tap your thread.

 

[MrJimi]

I have bought these at NAPA and it was a kit with all needed and I'm pretty sure it's a tapered thread like a pipe thread
You will do fine

 

[mark.r]

I have bought these at NAPA and it was a kit with all needed and I'm pretty sure it's a tapered thread like a pipe thread
You will do fine

Lowes has a decent metric tap set that I am going to look at. Although I don't know if it has tapered taps or not.

 

[MrJimi]

Mark, bring a grease fitting with you and like another member mentioned, match threads
The NAPA kit is made for grease fittings
I think this is the 4 way tool that Jerryg is talking about
http://napaonline.com/MasterPages/N...PartNumber=7151198&Description=Grease+Fitting

 

[RedRocker]

If it's tapered it won't be metric.

 

[mark.r]

If it's tapered it won't be metric.

I bought some metric replacements from TSC on Sunday and they looked to work. No let me say even the ones that came on the mower when I bought it did not look to screw all the way into the hole which leads me to believe that perhaps the hole IS tapered but Kioti installed "normal" 6mm metric fittings. Does that make sense?