6.5 Maintenance 
Spindle Hub Face and Shaft
Keep the shaft and wing nut threads clean and lubricated. Lubricate the shaft without 
contaminating the hub face. Select “Clean Spindle Threads” from the “Balance” 
primary screen. Run the edge of a rag between the threads while the spindle is 
slowly turned by the motor drive. If any signs of dirt or debris appear on the spindle 
threads, the spindle should be cleaned immediately prior to mounting a wheel. 
 CAUTION:  Failure to clean spindle properly will result in a loss of 
clamping force. Due to the force applied to the wheel by the 
load roller, it is critical to maintain optimum clamping force. 
Lubricate the shaft with a coating of light lubricant with Teflon® such as Super Lube® 
by Loctite after cleaning. Do not lubricate the spindle hub face mounting surface. This 
could cause slipping between the wheel and the hub face. Keep the hub face 
mounting surface clean and dry. 
BDC Laser Adhesive Weight Locator Maintenance or Service 
CAUTION:  Use of controls or adjustments or performance of procedures other than 
those specified herein may result in hazardous radiation exposure. 
This Laser Product is designated as Class 1M during all procedures of 
operation.
Never look directly into the laser. Doing so may cause serious injury. 
Do not intentional use a reflective device to enhance or re-direct the laser. 
Do not operate the laser if the cover or seal is damaged. 
There is no required maintenance or service to keep the BDC Laser in compliance. 
Any necessary repair or maintenance should be done by the factory only. The BDC 
Laser Locator has no field serviceable parts. 
The unit should never be opened or modified. 
Optional HammerHead™ TDC Laser Clip-On Weight Locator 
Maintenance or Service 
CAUTION:  Use of controls, adjustments, or performance of procedures 
other than those specified herein may result in hazardous 
radiation exposure. 
This Laser Product is designated as Class 2M during all 
procedures of operation. 
Do not stare into the beam or view directly with optical 
instruments. Doing so may cause serious injury. 
Do not intentionally use a reflective device to enhance or re-
direct the laser. 
Do not operate the laser if the cover or seal is damaged. 
GSP9720JLR Wheel Balancer Operation Instructions  Calibration and Maintenance 
 131