Grease gun question - Fiberglass RV


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Old 03-16-2016, 11:06 AM   #1
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Name: Henry
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Grease gun question

I am in the process of injecting new grease into my Casita's EZ lube wheel bearings. Why is it that when I squirt about half a 14 ox canister of grease thn the grease gun goes limp and will not inject any more. I then put in a new grease cartridge and I am again able to get grease to go into the EZ zert with a bit of pressure. Looking at the discarded cartridge, it looks about 1/3 to 1/2 full. That seems like a lot of wasted grease. This is my first time putting grease into the EZ lube bearings. I never noticed this when using bearing buddies or lubing the chassis of my lawnmower.

Do I need a new grease gun? If so any recommendations? Or what am I doing wrong.
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Old 03-16-2016, 11:44 AM   #2
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Sounds like the spring loaded plunger on the grease gun is sticking in the grease cartridge. Sometimes too you have to get the air out of the gun when installing a new cartridge or it won't put out any grease. A couple of my grease guns have a bleeder on the top, others just have a plug. When the gun stops putting out any grease, pull the plunger handle out and let it back in a couple times, see if that helps. And now we can start the discussion of grease gun versus pulling the hubs, cleaning, inspecting bearings and brakes, and hand greasing
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Old 03-16-2016, 11:51 AM   #3
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Grease guns are a bit temperamental, in my experience...
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Old 03-16-2016, 12:39 PM   #4
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Originally Posted by mary and bob View Post
.....And now we can start the discussion of grease gun versus pulling the hubs, cleaning, inspecting bearings and brakes, and hand greasing

IMHO:
EZ-Lube is nothing but a sales gimmick that should never be used. If one truly understands how it works, he/she would not use it. When grease is pumped in, it travels down a channel to the back side of the inner bearing, where if it doesn't displace the grease seal and contaminate the brake shoes and drum rendering them unable to stop the trailer, it is forced through the inner bearing. Enough grease must be pumped in to then fill the entire hub. Three hours and at least two tubes of grease later the grease, possibly contaminated by particles from the inner bearing or the internal cavity of the hub just might be forced through the outer bearing. Do yourself and your wheel bearings a favor and forget the E-Z Lube "feature." Maintain the bearings properly. Remove, clean, inspect, repack, and reinstall them. This is the tried and true way to do it. OK, rant over.


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Old 03-16-2016, 01:04 PM   #5
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I have EZ-Lubes on two trailers and happen to like them. Obviously YMMV
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EZ-Lube.JPG  
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Old 03-16-2016, 01:41 PM   #6
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Seems to me that half a tube of grease should be enough for the bearings on about six trailers.
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Old 03-16-2016, 01:49 PM   #7
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Seems to me that half a tube of grease should be enough for the bearings on about six trailers.
But how much can the brake drum hold? You really can't know until you've filled it up.
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Old 03-16-2016, 01:49 PM   #8
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Seems to me that half a tube of grease should be enough for the bearings on about six trailers.
I was thinking the same thing. The last time I used a grease gun on the Scamp, it just a couple of pumps until I saw the grease changing color as it was being pushed out.
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Old 03-16-2016, 02:05 PM   #9
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Just finished the other wheel. First wheel took 2 cartridges, but as I mentioned above, a considerable amount of grease was left in each cartridge but the gun would not squirt it out. The first half of each cartridge work fine, but the last half of the grease would not come out.

ON the 2nd wheel I put in a new cartridge and it filled up the EZ hub fairly quickly, maybe half a cartridge remaining, with the grease still pumping out. I just can't figure out why the first two worked for a while then just quit.

I have never taken a wheel/hub off to re grease it the proper way, but I expect I will one of these days.

Thanks to everyone who has responded.
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Old 03-16-2016, 02:14 PM   #10
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Sounds like way to much Grease. Are you sure some didn't come out somewhere else. If it did, you will find out after you toe the egg and find grease slung all over the place. .
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Old 03-16-2016, 02:23 PM   #11
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I was thinking the same thing. The last time I used a grease gun on the Scamp, it just a couple of pumps until I saw the grease changing color as it was being pushed out.

Yep. Highly likely the grease seal was pushed out. Personally, I would remove the wheel and the hub to check and if necessary, correct the problem before it creates a real mess.


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Old 03-16-2016, 02:31 PM   #12
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And when the break drums get all greased up I side - Well, that presents more problems.
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Old 03-16-2016, 02:55 PM   #13
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In the past Floyd and others have waxed poetic about EZLube. My trailer doesn't have them so I never took a close look at how they work. After reading Carl's "rant" and looking at Donna picture, I can see several reasons I wouldn't use it. It seems the idea is that the old grease is suppose to be displaced by new grease. But how can you tell if grease is travelling through the entire inner bearing. And it seems to me that you are pushing contaminated grease from the inner bearing through the outer bearing before clean grease arrives. How do you know the bearings are good? How about the seal?.How do you know the brakes and associated mechanism is in good shape? The last time I greased my bearings I found a wire had come loose just enough to make contact and insulation was worn. Finally it seems like when you do take things apart there will be one heck of a mess to clean up.

I had never greased bearings before I bought a trailer. I followed the instructions in the Dexter manual. It takes me an hour from start to finish to grease my bearings by hand, inspect the tires, and set the brakes. As some often say it's a maintenance issue. Raz
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Old 03-16-2016, 06:51 PM   #14
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Pretty good time there Raz. I'm a retired truck mechanic and by the time I jack up the trailer, pull the hub, wash the bearings in my parts cleaner machine and inspect them, clean the brake shoes, clean the old grease out of the hub, pack the bearings, install them and the hub and adjust everything, I'm well over an hour. But since I'm retired I'm in no hurry at all.
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