Quote:
Originally Posted by suzublu
The pivot pin is eliptical in shape, like a cam lobe, it will only lift out if the lobe is lined up with theopening, which only happens if the backrest is flat, which is why seat base removal makes it easier 
To remove the base, lift up the front until it pops off the spring bars, then push back with your knees to disengage the spring bars from the rear hooks, at the same time, lift from the back, if that makes sense? 
Courtesy of T-Cut https://www.the75andztclub.co.uk/for...98&postcount=2 |
That's a better explanation than mine
Explains why I had to crush the back against the seat so firmly and also why a previous person had bent one of the hinge receptacles.
If those white plastic inserts have crumbled, the camlobe males on the backrest drop lower down into the hinge female cutouts and make it harder to get the lower seat out to release the back.
Anyone know if there are any available?