19
Clutch-Brake Maintenance
This stitcher is equipped with a solenoid actuated, continuous trip, wrap spring clutch-brake unit.
It is a dependable device and seldom needs service. But should a malfunction occur, the following
information is a service and troubleshooting guide for the 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. Refer to
Figure 10
for more details.
Always disconnect the power supply before
making any adjustments or servicing the stitcher
WARNING
!
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 (850998 - 230 VAC
Coil Windings
or 850999 - 115 VAC)
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
Figure 12
for instructions)
the Coil.
Figure 10 - Actuator Checklist
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