6
FORM NO. L-20203-H-0822
TROUBLESHOOTING
PROBLEM
PROBABLE CAUSE
SOLUTION
Failure to Engage
Control valve malfunction or low air pressure
Check system for air leaks or replace control
valve.
Lack of lubrication on the Hub spline or in the
Air Chamber
Lubricate the Hub spline or check the
lubrication of the Air Chamber.
Rigid pip or tubing is being used for the air line
connections.
Use flexible tubing for the air line
connections.
A rigid inline coupling is mounted directly to
the Drive Flange.
Use Nexen's Flexible Clutch Coupling for
inline applications. Never connect a rigid
coupling directly to the Drive Flange.
Failure to Disengage
Unexhausted air due to a control valve
malfunction
Replace the control valve.
Broken Return Springs
Replace the Return Springs.
Lack of lubrication on the Hub spline or in the
Air Chamber
Lubricate the Hub spline or check the
lubrication of the Air Chamber.
A rigid inline coupling is mounted directly to
the Drive Flange
Use Nexen's Flexible Clutch Coupling for
inline applications. Never connect a rigid
coupling directly to the Drive Flange.
Tooth Wear or
Clicking Sound
Excessive engagement RPM, or unintentional
disengagement due to torque overload
Contact Nexen for clutch specifications.
Bearing Failure
Limit the air pressure to 80 psi. Excessive air pressure increases the thrust load on the bearings.
Stay within specified speed limits as specified in the OPERATIONS SECTION.
Use Nexen's Flexible Clutch Coupling for inline applications. Never connect a rigid coupling
directly to the Drive Flange.
Avoid applying excessive overhung loads to Pilot Mount Clutches. Wide pulleys or sprockets
which extend beyond the end of the clutch will increase the radial load and reduce bearing
life.
Ball
Bearings
Rotary
Seal
Hub
Drive
Flange
O-ring Seal
Back-up
Ring
Ball
Bearing
Piston
Cylinder
Compression
Spring
FIGURE 2
Enclosure
