[AT] [External] Re: IH 656

[Gunnells, Brad R]

Well thanks to all the great suggestions from you fine folks, I was able to get the broken nipple end out of the block. But let me tell you, that little b*stard put up a fight all the way to the end!

Dad tracked down a set of left-handed drill bits and a different style of easy out. I have the square shank ones from Snap-On. On suggestion we drug out the torch and heated the brass nipple from the inside of the hole as opposed to trying to heat the block (or at least this was the way I understood the suggestion).

We had intended to use the left-handed bit next as it was thought it might grip and spin the fitting out (hindsight leads me to believe it wouldn’t have). But unfortunately, the bits were only about 4” long. We’d need a bit 6”+ to get a straight shot into the block. The hole was too close to the frame rail and the drill chuck wound up hitting the frame so we couldn’t get in there square.

So, we tried the other style of easy out.
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It got a nice bite, and I thought it popped the fitting loose for a moment, then realized it had simply stripped out.

Ended up taking a metal jigsaw blade, using a die grinder and burr bit to make the blade narrow enough to fit inside the hole. Clamped it in a set of vice grips to use as a handle to push/pull the blade and cut through the nipple in a couple of places. Then took my sharpened punch and worked at tapping the fitting until it finally broke loose. Had to take a very small flat screwdriver and heat the tip and bend it over. Making a tool that would hook the backside of the nipple chunks to drag it out.

We put a shop vac over the hole to try and get any metal shavings we could with that. Took that small screwdriver we’d just bent to try and scrape everything, and then used a Q-Tip. After we got everything out we thought we were going to get, we fired it up and let it pump out a little oil from the hole to hopefully flush out anything loose.

Got a new oil sending unit installed and everything is back together. Just need to do an oil change on it now.

What should have been a 5-minute job turned into several hours of frustration. But in the end, we got it tackled. Thanks again for all the advice and suggestions.

Brad

From: AT <at-bounces at lists.antique-tractor.com> on behalf of Bill Brueck <bill at apluscomputer.com>
Date: Sunday, July 24, 2022 at 9:59 PM
To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com>
Subject: [External] Re: [AT] IH 656
So how did you fix this and how did it go, Brad?

B²
Bill Brueck
   Pine Island, MN USA

From: AT <at-bounces at lists.antique-tractor.com> On Behalf Of Gunnells, Brad R
Sent: Wednesday, July 20, 2022 9:28 AM
To: Antique tractor email discussion group <at at lists.antique-tractor.com>
Subject: [AT] IH 656

Ok, seems we need a little tractor talk here (but I wish I weren’t asking this!).

My dad went to replace the oil pressure sending unit on his IH 656. The sending unit was fitted into a brass elbow that screwed into the block. When he put the wrench on the sending unit it broke the elbow. So…here we are. We presumed that being brass it shouldn’t weld itself to the block and should just spin out with an easy out. Wrong! That little bastard is stuck in there good! Feeling a twist in the easy-out we didn’t want to risk breaking it off in there and compound the problem. We thought about using heat on the block as you would a steel bolt, but given the proximity we didn’t want to get things hot and cause a leak in the nearby gasket for what I presume is the timing gear cover.

Being brass we thought maybe we could take a sharpened punch and cut through and break the remaining part out of the block. While we got some of it, it didn’t really do what we’d hoped. I think we’re down to trying to drill it out. But I’m not fond of this idea as it’s an oil passage and any metal in there could be disastrous.

I figured I’d throw this out to the group and see if there’s anything we could/should do different? If we do indeed go the drill route we’d probably dip the bit in some grease to try and get any shavings to cling to the bit and remove it frequently to clean it off. Hopefully avoiding metal shavings inside. Then prior to installing the new pressure switch crank the tractor for a moment and let it push some engine oil out of the block hopefully flushing any debris.

Am I overlooking anything, or other options? I’ll also attempt to add a picture.

Thanks for any suggestions
Brad
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