On some Buffer Brush assemblies (294-116-065) used in the Phoenix Lite LT4 Lane Machine, we have seen premature wear on the pins and on the correlating holes in the drive pulley.  This wear is caused by poor engagement of the pins into the drive pulley. All Phoenix Lite LT4 Lane Machines manufactured before 5/5/2014 could potentially have the drive pin wear issue. 

If wearing is occurring between the pins and the drive pulley holes, the buffer brush will begin to make a scraping noise as it is operating. Continued wear will allow the buffer brush to disengage and fall out of the lane machine.

The pictures below, shows the wear of the drive pulley and engagement pins of the buffer brush hub (Figure 1)

Figure 1

It has been determined that the cause of this wear is due to poor engagement of the pins of the buffer brush hub into the drive pulley. This poor engagement is due to the pins being pressed too far into the buffer brush hub during the manufacturing process.

We recommend that you inspect the pins in the buffer brush assembly and the drive pulley for wear as shown in Figure 1.  If no wear has occurred, measure the height of the pins from the surface of the hub. The pins must protrude at least a 1/4" [6.35mm] but no more than 17/64” [6.74mm] from the surface of the hub. (Figure 2)

Figure 2

If upon inspection, there is wear showing on the pins of the buffer brush hub, in the holes of the drive pulley, or the pins measure less that 1/4” from the surface of the hub, contact Brunswick Technical Support 800-937-2695 or techsupport@brunswickbowling.com.

If you have questions regarding this or any other Service Bulletin, please contact the Brunswick Technical Support at 1-800-937-2695 or 231-725-4966, or Email techsupport@brunswickbowling.com.