I have the above cross trainer but the tension doesn't seem to change when I turn the dial. Can anyone tell me how to fix this. I have lost the instructions used when building the machine.

Jan, May 2016

Instructions here. It would have taken you less than 2 minutes to find these had you bothered to search for yourself:

http://www.powerhouse-fitness.co.uk/downloads/dl/file/id/128/marcy_mxt200.pdf.

If you have a Google account store a copy on Google Drive

Anon, May 2016