<!-- from fixya rte -->How do I fix a loose blade. - Garden

By loose blade I assume you mean that it can be moved up and down at the tip of the blade. It is most unlikely that the central nut has come loose, but check anyway. If this nut is tight and the shaft is loose in the bearing this means the bearing has worn out. Remove the deck from the machine. Photograph the run of the belt as this has to be removed. Also the direction of the grease nipple. Remove pulley from loose spindle. Turn deck on its edge or mount on two saw horses or similar so you can get to top and bottom of spindle bolts. Remove cutting blade. Remove spindle housing and clean area so no rubbish gets caught when reassembling. Otherwise spindle may be set different and mower will leave a line of differing cut. Take spindle to vise and remove any retaining nuts or circlips from shaft and clean as clean as new. Apply light oil or CRC etc to help move bearing along shaft. Open vise wider that outside of bearing, usually 44 to 50mm [1 3/4" to 2"] and refit nut on thread. Check nut is always spaced free of top bearing. With cushion of hardwood or nylon tap the shaft to move it down with lower bearing coming out of spindle housing. To remove top bearing from housing, turn housing up other way and use a wooden shaft such as a broom handle to tap bearing free of housing. Clean out grease and replace when reassembling. Do not reuse other bearing. They are cheap and likely to fail shortly anyway. These bearings usually have no seals on inside.