Nexen BSB07 965040 - Manual (Page 11)

11 FORM NO. L-21225-F-0813
TROUBLESHOOTING
Problem Probable Cause Solution
Failure to engage (brake) Weak or broken springs Replace broken springs
Failure to disengage (1)
Control valve malfunction -
air not getting to brake
Check for low air pressure or replace the
control valve.
NOTE: The Unit has been designed to
release before (at or below) 5.5 bar [80
psi] Required disengagement pressure
higher than 5.5 bar [80 psi] may indicate
improper assembly.
Failure to disengage (2) Air is leaking around the O-ring seals. Replace the O-rings.
Loss of torque Fraction Facing is worn or dirty. Replace friction face.