I replaced my springs on my rolls axle trailer yesterday. Thought I would share some photos...
Rolls uses a rubber block in a simple can assembly for "springs". The trailer is about 10 years old and to my knowledge has never had the blocks replaced.
Here is the spring assembly...
Springs.jpg
With the trailer jacked up you can unscrew the bottom nut on both sides and the axle will drop exposing the contents of the can assembly. You can see the stack up that fits inside the can assembly. Aluminum block, delrin block, then rubber "spring" block...
old-spring-stack.jpg
Here is the new rubber block next the 10-year old block. You can see how deformed the old block was and also how the old block was a bit shorter.
new-old-springs.jpg
The blocks were $7.50 each + some shipping from Rolls Axle. So for about $15 per axle I have a new suspension. Overall, it was an easy install. The hardest part was figuring out how to get both new assemblies lined up when I lifted the axle back up. I ended up getting my daugther to line up one side while I did the other. Also, a small bottle jack is helpful.