18
Clutch-Brake Maintenance
This stitcher is equipped with a solenoid actuated, continuous trip, wrap spring, clutch-brake unit.
It is a dependable device that seldom needs service, but should a malfunction occur, the following
information will serve as a service and trouble shooting guide for maintenance of this unit.
The actuator is a simple straight-forward mechanical linkage. When the actuator does not trip the
following checks should be made.
Always disconnect the power supply before
making any adjustments or servicing the stitcher
rWARNING
!
Actuator
Problem Cause and Remedy
No power to the Coil Check all wiring and switching in the
Clutch actuating system.
Lack of continuity in the Replace the Coil
Coil Windings
Mechanical binding of The Coil may have shifted or the Plunger end may
the Plunger have mushroomed due to striking the Backstop. In
the latter the Plunger may be filed to its true diameter.
Insufficient clearance for the Adjust the Linkage as needed
Actuator over the Stop Collar
Actuator loaded by the Braking force is exceeding the limits of the Brake
Stop Collar so hard that the or the Differential setting of the unit is too close
Actuator cannot be pulled by (see Assembly & Disassembly for instructions)
the Coil.
Figure 27 - Actuator Checklist
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