Marine Master Trailer

[dhuggins]

Guys looking for some advice..I am having some issues with a 2016 Marine Marine Master Trailer tandem axle under a Phoenix 920 ProXP that has been going on for about 6 months. I got this boat from a really good friend and it has had some miles on it but taken care of. I first noticed my brakes getting hot coming down a hill on my way home. When I got to the bottom of the hill I just so happen to look in the mirror and they were literally smoking. So I took it easy and got home. Upon inspection I believe the hub was so hot that it was burping grease out the backside of the seal. I'm pretty sure the smoke I was seeing was the grease being thrown on that super hot hub. So I checked everything out and noticed the master cylinder had some wear on it and I attributed it to this. (I also checked the break away tongue to make sure the main line wasnt pinched) Since I am the way I am I figured I would go ahead and order everything and completely repack and rebuild the hubs/brakes while I was it so I ordered a complete new inner member(master cylinder), new seals and bearings along with UFP Vault grease, brake pads, and vault grease caps as well.
Got those parts in broke down the wheels/hubs and replaced the bearings and pads. Re-greased the bearings/hubs filled the caps up to the ring put a bead of red loctite on the caps and hammered those back on. Installed the new inner member/reverse solenoid, dropped the nose of the trailer and power bled the brakes at the left rear bleeder screw at 15 psi. After a couple minutes brake fluid flowed out the screw perfectly clear no bubbles so I tightened her up and topped off the reservoir. Jacked each tire up to make sure the calipers weren't dragging and both wheels spun freely and its ready to go. Or so I thought.....

After a few times out I check to make sure the wheels are good and notice the brakes/hubs are hot. When I inspect it I notice there is grease that has been thrown out the back of both hubs once again. The grease was building up in the calipers and being thrown all on the inside of the wheel on both sides. So I said the calipers are sticking.. mad at myself I said why didn't i just go ahead and order two new calipers and replace those while I was down there. So ordered 2 new seals and new calipers. When those came in I broke everything down once again and installed them all. Re-greased, re-bled and good to go.

So take the boat out a few more times and notice once again the damn hubs are getting hot. They had grease thrown up everywhere and inside the wheels AGAIN. So I said I'll fix this. I ordered new hubs, seals, and bearings. I then completely removed all the calipers and brakes. Installed the new hubs bearings re-greased and put the caps on. I told myself get hot now without brakes.

Well here I am today after 1 trip with the new hubs and no brakes and the hubs are still throwing grease out the rear seal. I am convinced that there is something fundamentally wrong with this axle and I do not know where to go from here. I live in Arkansas and if I could I would drive this trailer directly to marine master and see if they could fix it. I kept ordering parts because I told myself that they had gotten so hot that it probably ruined the bearings and this is the last thing it could possibly be so this should fix it. Honestly, there isn't a lot to surge trailer brakes and it's not rocket science. I prefer to fix things myself to make sure things are done right. I have all new parts on the trailer and the rear seals WILL not hold the grease in. (yes I am sure they are all the correct part number because I ordered them per the manual linking to my trailer weight rating and axle size).

Things to note:
1. The seals were correctly seated and flush to the exterior of the hub.
2. The bearings were greased and caps filled according to UFP specs.
3. The spindle nut was tightened down to seat the bearings then backed off and hand tighten and there was no play when pulling on the hub.

I personally think there are some tolerances off and when the grease gets warms and thins out it immediately leaks around the seals. So if anyone has any ideas please help.