owm said:
Clean and lightly lubricate the areas which latch the roof to the A frame and see if that helps.
Why do people keep saying this ^ ^^^^
The roof has 2 separate operations on roof opening , the first is to unlatch the roof from the screen , this uses a completely different motor and is completely different operation from the lowering/raising operation , the op has clear stated that it Unlatches ! Lubricating these areas will just attract unwanted dirt if over lubricated , if it works fine ....... Don't fix it !
Ok now ....... If your motor is now located in the boot , and works one way only ...... Carefully and one pair at a time remove the hydraulic lines union bolts and washers from the pump block and swap the pairs over ! ie : take the two from the left and replace then with the right pair and vice a versa , make sure they stay one above the other in there pairs, with all there cooper washers etc ( if you look at the block where they bolt on they are marked 11 and 13 one side and 12 and 14 the other side , and the pipes are marked too , so you can make a quick sketch to be sure , when you put it back after this check ) tighten the union bolts up again and , if you find that the motor now works ok the other way around, from the way it was, ie: goes down but not up , chances are the motor or pump are faulty....., weak in one direction . I've had this once from the source your link is for ,but he replaced it without question .
It is also possible that you have kinked a hydraulic line whilst doing the relocation. ,causing the pump to struggle to pump the fluid through the linked area . But if you follow the pipe swap trick above it will still struggle the same direction as it did .