# Reaction Brake Troubleshooting

Symptoms | Cause(s) | Solution(s)
--- | --- | ---
Brake not maintaining torque - not engaging | Tooth-to-tooth gap (gap between teeth) is set too large Excessive wear on teeth | Adjust the height (distance) of tooth-to-tooth gap (gap between teeth) Replace brake assembly
Unable to rotate the tool holder/vertical rod - brake will not disengage | Insufficient air pressure to disengage brake - air pressure too low Pneumatic/electric circuit issue Tooth-to-tooth gap (gap between teeth) is not large enough when disengaged Debris is obstructing rotation | Check compressed air supply. Increase air pressure to meet minimum supply pressure required at clutch Check circuit control valve and cabling for failure Adjust the height (distance) of tooth-to-tooth gap (gap between teeth) Clear debris from teeth
Difficult to rotate the tool holder/vertical rod - excessive resistance when rotating | Insufficient air pressure to fully disengage brake - air pressure too low Locknut too tight Debris within bearings | Check compressed air supply. Increase air pressure to meet minimum supply pressure required Adjust resistance by loosening nut Clear debris from bearings
Tool will not start (Brake related) | Sensor not set to proper distance from sensing block | Readjust sensor distance