Are you only pushing the grease gun on or you turning the collar to lock the coupling on? With it locked on, sometimes the fitting will take the grease because it can not push the gun back. The fitting can also be turned out with a wrench, but the internal chamfer might have be ground away so the small hex on the fitting can be grabbed by the wrench. Some grease fittings are driven in, much the same way as the rivets are on Norton frame tags. Grab these and pull out and twist counter-clockwise at the same time. Good luck and I hope this helps.
I replace them every so often on the Kubota. It happens. I bought two boxes of assorted sizes. If you can get to it with a grease gun, you can get to it with a ratchet.
Maybe if it's a straight zerk. Angled, especially the 90° ones, probably not. I find that if I can get the ball to move, I can usually then get grease in it.
Kubota has six that I can recall that are not 90s. You have to remove the whole 90, then remove the zirk. I do them once every month or two.
Some bigger equipment uses manifolds to gang zerks together, so maintenance techs don't have to crawl all over the equipment to lube things.
I messed with it today for a bit. I was able to get it out, and clean it. grease will go through it, but grease wont go into the pin that it is there for. so, tomorrow I'm going to try and knock the pin out, and see what is going on. This is on a Kubota L35
There have been a number of variations of that tool over the years. By the time you fill the tool with light oil and get it screwed back together, the oil runs out. If you use a heavier oil so it doesn't run out, you run the risk of snapping the head off the zerk when you hit it with the hammer. Save your money and your time, and replace the fitting.
Heat it with a propane torch, too hot to touch. If that doesn't work try it again in 30 minutes after the heat has had a chance to soak. Additionally try moving the boom in different angles while you pump grease. Try greasing first with the bucket in the air, and then again with the bucket pushing on the ground. One of those positions should give you some clearance inside for the grease to move. Often they don't take grease because there is interference from the shaft being pressed up against where the hole is on the inside of the bushing.
that makes sense. its not the fitting, I'll try moving the boom and then, I'll try putting the bucket in the air. Thanks
Seriously the good fix for a clogged zerk is pull the fucker out and replace it. The things are cheap compared to the problems not having them working can cause.
Agree with the suggestion to move the boom. I’d add trying to move the boom to also create a gap on the zerk side. Like pushing down with the boom, or dropping it against something it can pivot over. I’ve also had grease dry under the zerk, in the part itself, creating a plug that blocked new grease. With a pick and spray solvent I’ve sometimes been able to clean/clear it.
Yep, this is what I ended up doing. I've had two on the backhoe bucket I've had to knock the pins out. The other was on the FEL. The FEL was fine, just make sure once you get the pressure off the pin, don't move the tractor or you'll misalign the hole for the pin to go back through.
