Howden WRV 204 (don't remember, might be a 163)

alignment check after 1 year of running.

aligned to within 0.05 mm when cold, howden used to say 0.1 mm, company I work for says max 0.08 mm.

after running the compressor for 1 hour and checking the alignment again, it had moved 0.02 mm on the height, making it 0.06 mm.

http://www.youtube.com/watch?v=bj27sJU5V6Y

balanced a coin on the compressor just for fun