COMPACT FLOTATION MACHINES

IMPELLER AND DIFFUSER REPLACEMENT

• The impeller is attached to the shaft by two (2) set screws in the impeller hub. The diffuser is attached to the standpipe by three (3) screws at the top of the diffuser.
• In replacing the impeller and/or the diffuser, the clearance between the parts should be set at 1/8”.

BEARING REPLACEMENT

• Scribe a line on the shaft above the bushing for the drive sheave. Remove the drive sheave, with a wheel puller if necessary.
• Remove the impeller by undoing the set screws and sliding the impeller off of the shaft.
• Loosen the screw in the top of the diffuser and with a wood block tap the diffuser from the standpipe.
• Unbolt and remove the standpipe, at this time you should inspect the grease seal condition, also note the position of the grease seal if it is to be replaced.
• Remove the dust cap from the top of the mechanism.
• Before attempting to remove the bearing from the housing scribe a line at the bottom of the bearing locking collar for repositioning during reassembly.
• Lock spindle horizontally in a vise.
• Using a wood block and a mallet drive the shaft and lower bearing out of the mechanism.
• Using a piece of shaft or pipe with a diameter of 1/8” larger then the shaft tap the upper bearing out of the mechanism.
• Clean the spindle mechanism for reassembly.
• Reassemble in the reverse order of the above instructions.
• When reassembling the mechanism, it is critical that all components be placed in the same position they were in.
• Check to be sure there is 1/8” clearance between the impeller and diffuser before reinstalling the mechanism.
• Grease fittings of upper and lower bearing with several shots from a grease gun, any quality bearing grease will do. Grease one time every week thereafter.