Heavy machinery pins information

[jtbinvalrico]

Can someone tell me about these pins that connect the upper end of a hydraulic ram in my scissor lift? I'm replacing the master cylinder (the whole story linked below). I noticed that this upper pin has holes drilled into it and has some kind of button on each end....the lower pin doesn't have any of this.

I have no issues with it.....I"m just wondering what the holes are for. Lubrication? There is a small hex screw on the end of the shaft support that looks like it might be removed to put oil in...? The lift is an Atlas FM9SL.




https://www.garagejournal.com/forum/showthread.php?t=383717

 

[cvairwerks]

Grease fitting.

 

[Moosefire]

That's an oil fitting. Dont put grease in there, it's meant for oil. Get a Tin Man style oil can and squirt some oil in there every once in a while.

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[firebirdparts]

That button on the end takes a pin-shaped grease gun. Or maybe we can debate there is such a thing as a pin-shaped oil gun, I don't know.

https://www.amazon.com/dp/B0002SR6XE/?tag=atomicindus08-20

 

[maxpat82]

look up the maintenance section of your lift manual.
those kind of fitting are for oil normally on lathe or mill. but could be grease for your lift (that would be a bit weird since a grease zerk works way better then a needle nozzle :| )

 

[cvairwerks]

That's an oil fitting. Dont put grease in there, it's meant for oil. Get a Tin Man style oil can and squirt some oil in there every once in a while.

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Think about the service it's in. It's in rod end or a bushing. It doesn't continuously rotate, so grease is more likely. If it were in a pillow block, or was driven, then it would be more likely oil service.

 

[stingry]

Looks like a broken off grease zerk. The ball that is visible is a check ball found in grease zerks.

 

[larry_g]

https://www.gitsmfg.com/style-gb-ball-oiler/

The fitting is a gits ball oiler. Made for oil, but I agree with Cvairwks that in this application grease makes better sense. Use a oil gun and squirt some oil in there and watch it come out the holes seen in the picture further down the pin.

lg
no neat sig line

 

[Farmall450]

https://www.gitsmfg.com/style-gb-ball-oiler/

The fitting is a gits ball oiler. Made for oil, but I agree with Cvairwks that in this application grease makes better sense. Use a oil gun and squirt some oil in there and watch it come out the holes seen in the picture further down the pin.

lg
no neat sig line

I also agree, grease makes the most sense here.

 

[jtbinvalrico]

Thanks all.....Gits ball oiler. Not covered at all in the maintenance section of the manual.

I need to get an oiler with a tip narrow enough to depress the ball while shooting oil in there. Makes sense now.

 

[firebirdparts]

Looks like a broken off grease zerk. The ball that is visible is a check ball found in grease zerks.

It's not.

 

[Moosefire]

Was there any grease on the pin when you removed it?

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[jtbinvalrico]

Was there any grease on the pin when you removed it?

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No grease, just light oil. I think oil is appropriate. You're supposed to depress the ball inward with the tip of an oiler and squirt to fill.

Behind that ball is a hole drilled down the center of the pin, one on each end. Along the length of the pin are two holes drilled perpendicular into the center where they meet the first hole. The oil you squirt in to both ends of the pin finds it's way down the hole, takes a 90 degree turn into the perpendicular hole and exits in the bore to lubricate.

I don't think thicker grease would work well there unless you could get some pressure behind it to push it through. Seems to me that a zerk fitting would be more appropriate for pushing grease into a fitting under some amount of pressure. This ball fitting seems to be more of a port for oil, with the primary purpose of the spring-loaded ball being to keep dirt out and oil in.

I'm still not sure why this is used only on the top pin. The lower pin is solid and the bore is fitted with "self lubricating bushings."

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[crewchief888]

more than likely, theres no clearance in the linkage for a std grease zerk.

 

[laser3kw]

more than likely, theres no clearance in the linkage for a std grease zerk.

+1
Also, some OEM are wary of the environment where the equipment will work. In prolong cold conditions, oil will continue to circulate and provide lubrication. Grease may stiffen up and become ineffective.

 

[Kevin54]

Thanks all.....Gits ball oiler. Not covered at all in the maintenance section of the manual.

I need to get an oiler with a tip narrow enough to depress the ball while shooting oil in there. Makes sense now.

All you need is a standard squirt/pump style oil can. The standard tip that is on them is fine.

 

[Monza Harry]

Those plunger fittings are used for oil frequently. Here is an example:
https://www.garagejournal.com/forum/attachment.php?attachmentid=893873&stc=1&d=1558237721