Airstream Forums

Airstream Forums (https://www.airforums.com/forums/)
-   1969-1971 Caravel (https://www.airforums.com/forums/f144/)
-   -   Caution, UltraLube on new axles may blow seals (https://www.airforums.com/forums/f144/caution-ultralube-on-new-axles-may-blow-seals-213743.html)

18caravel 09-01-2020 08:13 PM

Caution, UltraLube on new axles may blow seals
 
Backgrounder- Ultralube, EZLube have channels drilled through the spindle. The concept is good, these channels pump grease from a fitting on the end of the spindle, pump in the grease and it would feed both front and rear bearings without having to pull the brake drum and repack the bearings and reassemble.

2015-Bought a new AL-KO/AXIS (now Dexter) axle for the 71' Caravel before a big 3 month trip of a life-time. It came with 12"drum brakes already assembled. Installed the axle and pumped in grease until old grease was pushed out and set out and put on easily 10,000 miles.

Trailer sits for 5 years until 2020 when I'm prepping for another trip.
Pulled the wheel to check the brakes and found the drums and shoes covered with grease. Rear seals blew on both wheels...hmmm.

One of 3 things things happened, 1. The seals were defective. 2. Brakes were installed badly. Or the seals can't hold the grease pressure when they are pumped up per instructions. I repacked them, installed new rear seals and buttoned it up after a big cleanup. Just passing it along.
B.

tjdonahoe 09-01-2020 08:26 PM

Quote:

Originally Posted by 18caravel (Post 2405336)
Backgrounder- Ultralube, EZLube have channels drilled through the spindle. The concept is good, these channels pump grease from a fitting on the end of the spindle, pump in the grease and it would feed both front and rear bearings without having to pull the brake drum and repack the bearings and reassemble.

2015-Bought a new AL-KO/AXIS (now Dexter) axle for the 71' Caravel before a big 3 month trip of a life-time. It came with 12"drum brakes already assembled. Installed the axle and pumped in grease until old grease was pushed out and set out and put on easily 10,000 miles.

Trailer sits for 5 years until 2020 when I'm prepping for another trip.
Pulled the wheel to check the brakes and found the drums and shoes covered with grease. Rear seals blew on both wheels...hmmm.

One of 3 things things happened, 1. The seals were defective. 2. Brakes were installed badly. Or the seals can't hold the grease pressure when they are pumped up per instructions. I repacked them, installed new rear seals and buttoned it up after a big cleanup. Just passing it along.
B.

Donít over grease

18caravel 09-01-2020 08:39 PM

This time I repacked by hand and didn't pump any more. The seal has two lips and a spring to sit in a seat milled in the spindle, both seals had these lips either broken off or completely ripped off.

18caravel 10-25-2020 05:57 PM

a little more on the subject
 
The blown seals had bathed the brake shoes in grease, for years. I cleaned them up but they barely worked, so I pulled the wheels again after a 100 mile trip to install new shoes.
One seal was shredded again. I'm convinced, the seals designed for this application don't work. Last time I didn't pump in grease, hand packed them and very carefully inspected for burrs or anything sharp that could have thrashed the seals for a second time. Super careful sliding it all together.

The failure is always in the rear plastic/rubber wiper seals of these guys.


All times are GMT -6. The time now is 07:46 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.