Gas springs for office chair

Preliminary note:
I have over the years been a few office chairs squandered (broken foot cross, because only plastic, broken stitching of the seats, broken arm, broken gas springs), because I still have to sit a lot. My current office chair from 2010 is still quite ok, unfortunately once again the gas spring, the cause of all the anger - the seat height was no longer held the seat sagged over time just from (which is more than annoying).

Dismantling of old gas spring:
After I disassembled my office chair, I came upon the idea of ​​replacing the chair. All screws hold still and the cushion is also good. So economically thought only the gas spring should believe in it. Unfortunately, the dismantling of the gas spring proves (my first) a little difficult. The best way to solve under the star base backup (split pin), so the gas spring can be disassembled (definitely work on a suitable substrate or an old carpet / fabric inferior, it can always happen that!). The upper part could be easily removed with a pipe wrench from the seat mechanism (unscrew). The lower part of the old gas spring was pressed very tenaciously (my star base is made of die-cast aluminum) are knocked out, with a slightly bigger hammer he could after all. The next time that goes then easier because you know how hard it must strike: D. The old gas spring was also leaking, it could be seen traces of oil, that is really time to rebuild.

Installation of new gas spring:
This is very easy, even if the box was only the bill and no guidance here. Simply remove the protective cap, put the new gas spring on the star base, the seat lift it, load the chair, ready.

Shelf life:
For this I will write what in about a year. I weigh far less than 180 kg so that the gas spring is sufficiently dimensioned. My office chair itself is quite heavy (about 25 kg), so I am on the safe side.

Conclusion:
The gas spring does its job, the price is more than fair. In addition, it is more economical to replace only the defective component.