Forum Discussion

scottykrug's avatar
scottykrug
Explorer
May 08, 2013

Add grease zerk to axle or not?

Just finished repacking all the hubs and noticed that there was a threaded hole at the end of the spindle and a small hole just inside the lip for the inner seal. I presume this is one of those easy lube fixtures (my axles just didn't come fully set up with that option). I will still pull them apart to service them, but is there any benefit to add the zerk to add grease? I removed the craptastic plastic grease caps (two cracked and one let water in) and replaced them with oversized old school metal ones so there will be plenty of room inside the cap. I am thinking against it, but would like to see if there is any benefit from those who have this feature.
  • I use mine. Been using them for over 10 years. I generally take the drum off and check the bearings, etc. every other year, and use the EZ lube the in between years. Even the years I take the drum off I still give the EZ lube a couple of shots. Lot of false information on here - you don't have to fill the entire void in the hub, your chances of blowing out the seal are near zero - unless your trying to fill the entire void in the hub (alot of people confuse EZ lube with bearing buddys). Just make sure you use the correct grease as recommended by the manufacturer and you're good to go. P.S. If the bearing went out you can expect the seal to be compromised. That had nothing to do with the EZ lube feature. You have to check the bearings regularly. You can check the bearing simply by jack the tire up occasionly and checking for playing and listening/feeling/looking for anything unusual while you spin the wheel.
  • Thank you for the replies. Pretty much what I was thinking. One of the bearings went out and the inner seal was compromised (grease was all over) without me pumping grease in. Will stick to just pulling them apart and avoid any headaches.

    Thank you again! Back to getting the camper ready for this summer.
  • Biggest problem with zerk greasing of axle bearings is over lubing them. this tends to grease brake linings causing brake performance problems.
  • Keep in mind that if you use this feature, (and I strongly suggest you don't) you have to fill the entire void inside the hub before grease will come back forward and out through the front bearing. Only when you see grease movement in the front bearing do you know both inners and outers have been lubed.
  • I doubt you'll hurt anything adding grease unless you blow it out the seal in back. Obviously, that wouldn't be good. Given the fact they are designed to allow pumping grease into, and through the hub, adding a little in a pinch won't hurt, just doubt it will be as effective as checking and packing directly as you did. I used my super lube feature for three years and it does sorta work, but it's a lot of grease and a lot of pumping. I have also opted for the direct method from here on out.
  • greasing bearings that way is best left to boat trailers that need the water squeezed out. Always better to tear them down, clean them and check for problems, repack, replace the seals, check the brakes and be good to go again.
  • No, your much better off servicing them as you did, especially if you used standard seals and not the double edge type. Even with the better seals leaks on pads are common.
  • I don't know but I check the bearings to see if they need adjustment when I do I put 2 or 3 pumps in when I need to remove the cap to tighten the nut. Right or wrong.