Hey guys I just traded my L3700su in on a MX5100. I brought it home and started picking it apart. Other than the lighter color orange of the body as compared to the loader arms, I noticed on the cylinders that there is a rubber ring around the arms. They look like they should be attached to the body of the cylinder so when it moves up and down it cleans the arm. They arent connected to the body but they just stay at the base when the body goes up.....Is this normal? I never noticed on the L3700. Thanks in advance for the help.