1. CUBICLE
Check the fastening weather they are not loose
Check the packing weather they are not deteriorate
Check the foundation wether it is not deformed due to sinking or rising of ground
Check the door and window weather they are not bad condition
Check the patiton wall weather they are not deformed or damaged
Clean foreign matter and dust
Clean the body of frame
Tight bolts and nuts
Lubricate the mechanism