Yes, they do need service if you want them to last.
The old style Hirschmann power antennas are quite reliable. When they do fail it is likely due to neglect - just like many other mechanical things. They need attention and a little care. Don't want to bother with that??
Problem & Solution
Common among these chassis:
R107
W114
W115
W116
W123
W124
W126
R129
W140
W201
Watch Kent's free youtube video and he will explain some of the main causes of failure, what you can do to prolong the antenna's life, and what are your best options to repair it should it fail.