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Reload this Page Broken pressed grease fitting on axle
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  #1  
Old 10-12-2013, 10:00 PM
gillis51 gillis51 is offline
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Default Broken pressed grease fitting on axle
Just broke the pressed greased fitting on my 149 axle. Has anyone replaced these with new pressed fitting or drilled and tapped new fittings
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Old 10-12-2013, 10:23 PM
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Jeff in Pa Jeff in Pa is offline
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The small size screw in grease fitting is 1/4-28 NF thread. The correct drill size is a #3 drill which is .213
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Old 10-13-2013, 06:31 PM
gillis51 gillis51 is offline
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So no issues with drilling and tapping cast iron? Are press in fittings and option?
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Old 10-13-2013, 07:04 PM
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Originally Posted by gillis51 View Post
So no issues with drilling and tapping cast iron? Are press in fittings and option?
Just try your best to follow the same angle the original hole was drilled and don't go too fast.

If you can get the pressed in grease fitting out, I see no reason why you couldn't put another pressed in one in.
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Old 10-13-2013, 07:10 PM
finsruskw finsruskw is offline
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My experience w/this is that by the time you get the busted one out (drilled or driven), the hole is hogged out so much a new press zerk won't stay in. And if you drill and tap, the new one will be screwed in so far by the time it gets tight it will be sticking ithrough into the shaft hole and you will have to file the inside down for clearance. At least that's the way it worked out for me on a wide frame spindle.

Dave S
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Old 10-13-2013, 07:34 PM
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My experience w/this is that by the time you get the busted one out (drilled or driven), the hole is hogged out so much a new press zerk won't stay in. And if you drill and tap, the new one will be screwed in so far by the time it gets tight it will be sticking ithrough into the shaft hole and you will have to file the inside down for clearance. At least that's the way it worked out for me on a wide frame spindle.

Dave S
Perhaps you ran the tap in too far. In most cases, the NPT tap is turned in 2/3 rds of the body height for "correct" pitch diameter. Some blueprints for cast iron NPT holes call for them to be tapped shallow to allow for wear. In those cases we run the tap in about 1/2 way which is about 2-3 turns on the gage too shallow.

You can grind the bottom of the fittin goff too if it protrudes into the mounting bore.
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Old 10-13-2013, 08:10 PM
gmbadgley gmbadgley is offline
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The press in zerks are junk. If you pump a little too hard when you grease them, you push them back out. spend the time and thread the hole. I have never had one hit the shaft.
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